./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--misc--pch_phub.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--misc--pch_phub.ko-main.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 a5b351dc48b78577594847e2589a2433da4c3422ed74f69290b3f52d3ba2c2d2 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 16:04:59,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 16:04:59,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 16:04:59,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 16:04:59,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 16:04:59,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 16:04:59,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 16:04:59,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 16:04:59,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 16:04:59,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 16:04:59,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 16:04:59,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 16:04:59,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 16:04:59,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 16:04:59,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 16:04:59,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 16:04:59,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 16:04:59,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 16:04:59,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 16:04:59,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 16:04:59,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 16:04:59,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 16:04:59,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 16:04:59,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 16:04:59,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 16:04:59,495 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 16:04:59,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 16:04:59,498 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 16:04:59,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 16:04:59,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 16:04:59,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 16:04:59,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 16:04:59,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 16:04:59,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 16:04:59,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 16:04:59,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 16:04:59,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 16:04:59,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 16:04:59,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 16:04:59,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 16:04:59,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 16:04:59,508 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 16:04:59,525 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 16:04:59,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 16:04:59,525 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 16:04:59,525 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 16:04:59,526 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 16:04:59,526 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 16:04:59,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 16:04:59,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 16:04:59,527 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 16:04:59,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 16:04:59,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 16:04:59,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 16:04:59,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 16:04:59,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 16:04:59,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 16:04:59,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 16:04:59,529 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 16:04:59,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 16:04:59,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 16:04:59,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 16:04:59,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 16:04:59,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:04:59,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 16:04:59,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 16:04:59,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 16:04:59,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 16:04:59,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 16:04:59,531 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 16:04:59,531 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 16:04:59,532 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 16:04:59,532 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 16:04:59,532 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5b351dc48b78577594847e2589a2433da4c3422ed74f69290b3f52d3ba2c2d2 [2021-12-21 16:04:59,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 16:04:59,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 16:04:59,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 16:04:59,744 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 16:04:59,748 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 16:04:59,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--misc--pch_phub.ko-main.cil.out.i [2021-12-21 16:04:59,797 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4c0e63f3/b2912acc20a54978835c0ff76991b498/FLAGcbe173fbe [2021-12-21 16:05:00,321 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 16:05:00,321 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--misc--pch_phub.ko-main.cil.out.i [2021-12-21 16:05:00,344 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4c0e63f3/b2912acc20a54978835c0ff76991b498/FLAGcbe173fbe [2021-12-21 16:05:00,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4c0e63f3/b2912acc20a54978835c0ff76991b498 [2021-12-21 16:05:00,825 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 16:05:00,826 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 16:05:00,828 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 16:05:00,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 16:05:00,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 16:05:00,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:05:00" (1/1) ... [2021-12-21 16:05:00,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d4cfa10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:05:00, skipping insertion in model container [2021-12-21 16:05:00,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:05:00" (1/1) ... [2021-12-21 16:05:00,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 16:05:00,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 16:05:01,402 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-consumption/32_7a_cilled_linux-3.8-rc1-drivers--misc--pch_phub.ko-main.cil.out.i[106459,106472] [2021-12-21 16:05:01,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:05:01,474 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 16:05:01,626 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-consumption/32_7a_cilled_linux-3.8-rc1-drivers--misc--pch_phub.ko-main.cil.out.i[106459,106472] [2021-12-21 16:05:01,643 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:05:01,684 INFO L208 MainTranslator]: Completed translation [2021-12-21 16:05:01,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:05:01 WrapperNode [2021-12-21 16:05:01,686 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 16:05:01,687 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 16:05:01,687 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 16:05:01,687 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 16:05:01,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:05:01" (1/1) ... [2021-12-21 16:05:01,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:05:01" (1/1) ... [2021-12-21 16:05:01,801 INFO L137 Inliner]: procedures = 128, calls = 740, calls flagged for inlining = 53, calls inlined = 47, statements flattened = 2000 [2021-12-21 16:05:01,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 16:05:01,802 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 16:05:01,802 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 16:05:01,802 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 16:05:01,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:05:01" (1/1) ... [2021-12-21 16:05:01,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:05:01" (1/1) ... [2021-12-21 16:05:01,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:05:01" (1/1) ... [2021-12-21 16:05:01,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:05:01" (1/1) ... [2021-12-21 16:05:01,898 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:05:01" (1/1) ... [2021-12-21 16:05:01,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:05:01" (1/1) ... [2021-12-21 16:05:01,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:05:01" (1/1) ... [2021-12-21 16:05:01,935 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 16:05:01,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 16:05:01,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 16:05:01,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 16:05:01,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:05:01" (1/1) ... [2021-12-21 16:05:01,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:05:01,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:05:01,964 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 16:05:01,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 16:05:01,997 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2021-12-21 16:05:01,997 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2021-12-21 16:05:01,998 INFO L130 BoogieDeclarations]: Found specification of procedure pch_phub_remove [2021-12-21 16:05:01,998 INFO L138 BoogieDeclarations]: Found implementation of procedure pch_phub_remove [2021-12-21 16:05:01,998 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-12-21 16:05:01,998 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-12-21 16:05:01,998 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 16:05:01,998 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_create_bin_file [2021-12-21 16:05:01,998 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_create_bin_file [2021-12-21 16:05:01,998 INFO L130 BoogieDeclarations]: Found specification of procedure pch_phub_read_modify_write_reg [2021-12-21 16:05:01,998 INFO L138 BoogieDeclarations]: Found implementation of procedure pch_phub_read_modify_write_reg [2021-12-21 16:05:01,999 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_pch_phub_mutex [2021-12-21 16:05:01,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_pch_phub_mutex [2021-12-21 16:05:01,999 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-21 16:05:01,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-21 16:05:01,999 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-21 16:05:01,999 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-21 16:05:01,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 16:05:02,000 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-21 16:05:02,000 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-21 16:05:02,000 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-12-21 16:05:02,000 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-12-21 16:05:02,000 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-21 16:05:02,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-21 16:05:02,000 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-21 16:05:02,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-21 16:05:02,001 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32 [2021-12-21 16:05:02,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32 [2021-12-21 16:05:02,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 16:05:02,001 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_remove_file [2021-12-21 16:05:02,001 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_remove_file [2021-12-21 16:05:02,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 16:05:02,001 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_device [2021-12-21 16:05:02,001 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_device [2021-12-21 16:05:02,002 INFO L130 BoogieDeclarations]: Found specification of procedure pci_unmap_rom [2021-12-21 16:05:02,002 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_unmap_rom [2021-12-21 16:05:02,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 16:05:02,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 16:05:02,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 16:05:02,002 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-12-21 16:05:02,003 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-12-21 16:05:02,003 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite32 [2021-12-21 16:05:02,003 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite32 [2021-12-21 16:05:02,003 INFO L130 BoogieDeclarations]: Found specification of procedure ioread8 [2021-12-21 16:05:02,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread8 [2021-12-21 16:05:02,003 INFO L130 BoogieDeclarations]: Found specification of procedure pci_enable_wake [2021-12-21 16:05:02,003 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_enable_wake [2021-12-21 16:05:02,003 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2021-12-21 16:05:02,003 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2021-12-21 16:05:02,004 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-12-21 16:05:02,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 16:05:02,004 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_pch_phub_mutex [2021-12-21 16:05:02,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_pch_phub_mutex [2021-12-21 16:05:02,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 16:05:02,005 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iounmap [2021-12-21 16:05:02,005 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iounmap [2021-12-21 16:05:02,005 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_power_state [2021-12-21 16:05:02,006 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_power_state [2021-12-21 16:05:02,006 INFO L130 BoogieDeclarations]: Found specification of procedure pch_phub_write_serial_rom [2021-12-21 16:05:02,006 INFO L138 BoogieDeclarations]: Found implementation of procedure pch_phub_write_serial_rom [2021-12-21 16:05:02,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 16:05:02,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 16:05:02,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 16:05:02,007 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_create_file [2021-12-21 16:05:02,007 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_create_file [2021-12-21 16:05:02,007 INFO L130 BoogieDeclarations]: Found specification of procedure pch_phub_read_serial_rom [2021-12-21 16:05:02,007 INFO L138 BoogieDeclarations]: Found implementation of procedure pch_phub_read_serial_rom [2021-12-21 16:05:02,007 INFO L130 BoogieDeclarations]: Found specification of procedure pci_map_rom [2021-12-21 16:05:02,007 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_map_rom [2021-12-21 16:05:02,285 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 16:05:02,287 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 16:05:03,260 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 16:05:03,268 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 16:05:03,268 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 16:05:03,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:05:03 BoogieIcfgContainer [2021-12-21 16:05:03,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 16:05:03,271 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 16:05:03,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 16:05:03,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 16:05:03,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 04:05:00" (1/3) ... [2021-12-21 16:05:03,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59a0ce88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:05:03, skipping insertion in model container [2021-12-21 16:05:03,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:05:01" (2/3) ... [2021-12-21 16:05:03,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59a0ce88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:05:03, skipping insertion in model container [2021-12-21 16:05:03,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:05:03" (3/3) ... [2021-12-21 16:05:03,276 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--misc--pch_phub.ko-main.cil.out.i [2021-12-21 16:05:03,279 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 16:05:03,279 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 16:05:03,311 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 16:05:03,315 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 16:05:03,316 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 16:05:03,346 INFO L276 IsEmpty]: Start isEmpty. Operand has 606 states, 402 states have (on average 1.271144278606965) internal successors, (511), 412 states have internal predecessors, (511), 174 states have call successors, (174), 28 states have call predecessors, (174), 28 states have return successors, (174), 174 states have call predecessors, (174), 174 states have call successors, (174) [2021-12-21 16:05:03,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-21 16:05:03,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:05:03,351 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:05:03,351 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:05:03,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:05:03,355 INFO L85 PathProgramCache]: Analyzing trace with hash -838784516, now seen corresponding path program 1 times [2021-12-21 16:05:03,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:05:03,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279921189] [2021-12-21 16:05:03,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:05:03,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:05:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:03,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:05:03,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:05:03,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279921189] [2021-12-21 16:05:03,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279921189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:05:03,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:05:03,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 16:05:03,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655678831] [2021-12-21 16:05:03,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:05:03,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:05:03,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:05:03,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:05:03,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:05:03,655 INFO L87 Difference]: Start difference. First operand has 606 states, 402 states have (on average 1.271144278606965) internal successors, (511), 412 states have internal predecessors, (511), 174 states have call successors, (174), 28 states have call predecessors, (174), 28 states have return successors, (174), 174 states have call predecessors, (174), 174 states have call successors, (174) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 16:05:03,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:05:03,824 INFO L93 Difference]: Finished difference Result 1792 states and 2597 transitions. [2021-12-21 16:05:03,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:05:03,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-21 16:05:03,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:05:03,854 INFO L225 Difference]: With dead ends: 1792 [2021-12-21 16:05:03,854 INFO L226 Difference]: Without dead ends: 1185 [2021-12-21 16:05:03,863 INFO L932 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 [2021-12-21 16:05:03,866 INFO L933 BasicCegarLoop]: 1020 mSDtfsCounter, 823 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 1857 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:05:03,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [823 Valid, 1857 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:05:03,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-12-21 16:05:04,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1181. [2021-12-21 16:05:04,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 783 states have (on average 1.2630906768837804) internal successors, (989), 795 states have internal predecessors, (989), 343 states have call successors, (343), 55 states have call predecessors, (343), 54 states have return successors, (338), 338 states have call predecessors, (338), 338 states have call successors, (338) [2021-12-21 16:05:04,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1670 transitions. [2021-12-21 16:05:04,026 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1670 transitions. Word has length 15 [2021-12-21 16:05:04,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:05:04,026 INFO L470 AbstractCegarLoop]: Abstraction has 1181 states and 1670 transitions. [2021-12-21 16:05:04,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 16:05:04,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1670 transitions. [2021-12-21 16:05:04,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 16:05:04,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:05:04,031 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:05:04,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 16:05:04,031 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:05:04,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:05:04,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1677123996, now seen corresponding path program 1 times [2021-12-21 16:05:04,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:05:04,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033717268] [2021-12-21 16:05:04,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:05:04,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:05:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:05:04,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:05:04,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033717268] [2021-12-21 16:05:04,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033717268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:05:04,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:05:04,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 16:05:04,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321326194] [2021-12-21 16:05:04,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:05:04,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:05:04,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:05:04,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:05:04,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:05:04,137 INFO L87 Difference]: Start difference. First operand 1181 states and 1670 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 16:05:04,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:05:04,202 INFO L93 Difference]: Finished difference Result 1199 states and 1690 transitions. [2021-12-21 16:05:04,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:05:04,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-21 16:05:04,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:05:04,209 INFO L225 Difference]: With dead ends: 1199 [2021-12-21 16:05:04,209 INFO L226 Difference]: Without dead ends: 1190 [2021-12-21 16:05:04,212 INFO L932 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 [2021-12-21 16:05:04,214 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 842 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:05:04,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 866 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:05:04,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2021-12-21 16:05:04,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1181. [2021-12-21 16:05:04,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 783 states have (on average 1.2618135376756066) internal successors, (988), 795 states have internal predecessors, (988), 343 states have call successors, (343), 55 states have call predecessors, (343), 54 states have return successors, (338), 338 states have call predecessors, (338), 338 states have call successors, (338) [2021-12-21 16:05:04,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1669 transitions. [2021-12-21 16:05:04,274 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1669 transitions. Word has length 18 [2021-12-21 16:05:04,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:05:04,274 INFO L470 AbstractCegarLoop]: Abstraction has 1181 states and 1669 transitions. [2021-12-21 16:05:04,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 16:05:04,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1669 transitions. [2021-12-21 16:05:04,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-21 16:05:04,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:05:04,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:05:04,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 16:05:04,276 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:05:04,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:05:04,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1619865694, now seen corresponding path program 1 times [2021-12-21 16:05:04,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:05:04,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965984669] [2021-12-21 16:05:04,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:05:04,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:05:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:04,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:05:04,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:05:04,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965984669] [2021-12-21 16:05:04,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965984669] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:05:04,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:05:04,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 16:05:04,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538719190] [2021-12-21 16:05:04,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:05:04,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:05:04,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:05:04,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:05:04,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:05:04,319 INFO L87 Difference]: Start difference. First operand 1181 states and 1669 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 16:05:04,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:05:04,354 INFO L93 Difference]: Finished difference Result 1183 states and 1670 transitions. [2021-12-21 16:05:04,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:05:04,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-21 16:05:04,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:05:04,359 INFO L225 Difference]: With dead ends: 1183 [2021-12-21 16:05:04,359 INFO L226 Difference]: Without dead ends: 1180 [2021-12-21 16:05:04,360 INFO L932 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 [2021-12-21 16:05:04,361 INFO L933 BasicCegarLoop]: 844 mSDtfsCounter, 830 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:05:04,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [830 Valid, 844 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:05:04,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-12-21 16:05:04,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1180. [2021-12-21 16:05:04,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 783 states have (on average 1.260536398467433) internal successors, (987), 794 states have internal predecessors, (987), 342 states have call successors, (342), 55 states have call predecessors, (342), 54 states have return successors, (338), 338 states have call predecessors, (338), 338 states have call successors, (338) [2021-12-21 16:05:04,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 1667 transitions. [2021-12-21 16:05:04,409 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 1667 transitions. Word has length 18 [2021-12-21 16:05:04,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:05:04,409 INFO L470 AbstractCegarLoop]: Abstraction has 1180 states and 1667 transitions. [2021-12-21 16:05:04,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 16:05:04,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 1667 transitions. [2021-12-21 16:05:04,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 16:05:04,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:05:04,411 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:05:04,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 16:05:04,411 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:05:04,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:05:04,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1323407411, now seen corresponding path program 1 times [2021-12-21 16:05:04,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:05:04,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653961814] [2021-12-21 16:05:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:05:04,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:05:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:05:04,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:05:04,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653961814] [2021-12-21 16:05:04,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653961814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:05:04,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:05:04,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 16:05:04,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630743234] [2021-12-21 16:05:04,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:05:04,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:05:04,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:05:04,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:05:04,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:05:04,452 INFO L87 Difference]: Start difference. First operand 1180 states and 1667 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 16:05:04,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:05:04,485 INFO L93 Difference]: Finished difference Result 1182 states and 1668 transitions. [2021-12-21 16:05:04,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:05:04,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-21 16:05:04,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:05:04,489 INFO L225 Difference]: With dead ends: 1182 [2021-12-21 16:05:04,489 INFO L226 Difference]: Without dead ends: 1179 [2021-12-21 16:05:04,490 INFO L932 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 [2021-12-21 16:05:04,491 INFO L933 BasicCegarLoop]: 842 mSDtfsCounter, 827 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:05:04,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [827 Valid, 842 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:05:04,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-12-21 16:05:04,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1179. [2021-12-21 16:05:04,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 783 states have (on average 1.2592592592592593) internal successors, (986), 793 states have internal predecessors, (986), 341 states have call successors, (341), 55 states have call predecessors, (341), 54 states have return successors, (338), 338 states have call predecessors, (338), 338 states have call successors, (338) [2021-12-21 16:05:04,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1665 transitions. [2021-12-21 16:05:04,543 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1665 transitions. Word has length 19 [2021-12-21 16:05:04,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:05:04,543 INFO L470 AbstractCegarLoop]: Abstraction has 1179 states and 1665 transitions. [2021-12-21 16:05:04,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 16:05:04,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1665 transitions. [2021-12-21 16:05:04,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-21 16:05:04,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:05:04,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:05:04,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 16:05:04,545 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:05:04,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:05:04,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1924401979, now seen corresponding path program 1 times [2021-12-21 16:05:04,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:05:04,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962764181] [2021-12-21 16:05:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:05:04,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:05:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:04,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:05:04,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:05:04,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962764181] [2021-12-21 16:05:04,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962764181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:05:04,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:05:04,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 16:05:04,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479842242] [2021-12-21 16:05:04,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:05:04,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:05:04,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:05:04,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:05:04,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 16:05:04,602 INFO L87 Difference]: Start difference. First operand 1179 states and 1665 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 16:05:04,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:05:04,695 INFO L93 Difference]: Finished difference Result 3497 states and 4957 transitions. [2021-12-21 16:05:04,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:05:04,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-21 16:05:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:05:04,708 INFO L225 Difference]: With dead ends: 3497 [2021-12-21 16:05:04,708 INFO L226 Difference]: Without dead ends: 2315 [2021-12-21 16:05:04,715 INFO L932 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 [2021-12-21 16:05:04,716 INFO L933 BasicCegarLoop]: 1074 mSDtfsCounter, 821 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 1888 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:05:04,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 1888 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:05:04,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2021-12-21 16:05:04,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2300. [2021-12-21 16:05:04,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 1528 states have (on average 1.2604712041884816) internal successors, (1926), 1553 states have internal predecessors, (1926), 667 states have call successors, (667), 106 states have call predecessors, (667), 104 states have return successors, (668), 656 states have call predecessors, (668), 660 states have call successors, (668) [2021-12-21 16:05:04,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 3261 transitions. [2021-12-21 16:05:04,800 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 3261 transitions. Word has length 20 [2021-12-21 16:05:04,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:05:04,800 INFO L470 AbstractCegarLoop]: Abstraction has 2300 states and 3261 transitions. [2021-12-21 16:05:04,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 16:05:04,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 3261 transitions. [2021-12-21 16:05:04,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-21 16:05:04,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:05:04,804 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:05:04,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 16:05:04,804 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:05:04,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:05:04,804 INFO L85 PathProgramCache]: Analyzing trace with hash 389432597, now seen corresponding path program 1 times [2021-12-21 16:05:04,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:05:04,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841185952] [2021-12-21 16:05:04,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:05:04,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:05:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:04,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-21 16:05:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:04,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:05:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:04,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 16:05:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:04,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 16:05:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:04,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 16:05:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:05:04,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:05:04,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841185952] [2021-12-21 16:05:04,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841185952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:05:04,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:05:04,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:05:04,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589424833] [2021-12-21 16:05:04,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:05:04,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:05:04,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:05:04,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:05:04,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:05:04,917 INFO L87 Difference]: Start difference. First operand 2300 states and 3261 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 16:05:06,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:05:06,162 INFO L93 Difference]: Finished difference Result 6694 states and 9531 transitions. [2021-12-21 16:05:06,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 16:05:06,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2021-12-21 16:05:06,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:05:06,183 INFO L225 Difference]: With dead ends: 6694 [2021-12-21 16:05:06,183 INFO L226 Difference]: Without dead ends: 4397 [2021-12-21 16:05:06,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:05:06,192 INFO L933 BasicCegarLoop]: 975 mSDtfsCounter, 844 mSDsluCounter, 1548 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 783 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 985 SdHoareTripleChecker+Valid, 2523 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 783 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:05:06,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [985 Valid, 2523 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [783 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 16:05:06,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4397 states. [2021-12-21 16:05:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4397 to 4228. [2021-12-21 16:05:06,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 2788 states have (on average 1.2503586800573887) internal successors, (3486), 2829 states have internal predecessors, (3486), 1243 states have call successors, (1243), 198 states have call predecessors, (1243), 196 states have return successors, (1244), 1232 states have call predecessors, (1244), 1236 states have call successors, (1244) [2021-12-21 16:05:06,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 5973 transitions. [2021-12-21 16:05:06,359 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 5973 transitions. Word has length 49 [2021-12-21 16:05:06,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:05:06,359 INFO L470 AbstractCegarLoop]: Abstraction has 4228 states and 5973 transitions. [2021-12-21 16:05:06,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 16:05:06,359 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 5973 transitions. [2021-12-21 16:05:06,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-21 16:05:06,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:05:06,362 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:05:06,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 16:05:06,363 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:05:06,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:05:06,363 INFO L85 PathProgramCache]: Analyzing trace with hash 222631348, now seen corresponding path program 1 times [2021-12-21 16:05:06,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:05:06,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832412131] [2021-12-21 16:05:06,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:05:06,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:05:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:06,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-21 16:05:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:06,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:05:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:06,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 16:05:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:06,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:05:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:06,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 16:05:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:05:06,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:05:06,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832412131] [2021-12-21 16:05:06,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832412131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:05:06,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:05:06,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:05:06,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102357655] [2021-12-21 16:05:06,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:05:06,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:05:06,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:05:06,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:05:06,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:05:06,432 INFO L87 Difference]: Start difference. First operand 4228 states and 5973 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 16:05:07,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:05:07,524 INFO L93 Difference]: Finished difference Result 10670 states and 15167 transitions. [2021-12-21 16:05:07,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 16:05:07,524 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 60 [2021-12-21 16:05:07,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:05:07,594 INFO L225 Difference]: With dead ends: 10670 [2021-12-21 16:05:07,594 INFO L226 Difference]: Without dead ends: 6445 [2021-12-21 16:05:07,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:05:07,607 INFO L933 BasicCegarLoop]: 1486 mSDtfsCounter, 726 mSDsluCounter, 2144 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 3630 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 16:05:07,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [867 Valid, 3630 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 16:05:07,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6445 states. [2021-12-21 16:05:07,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6445 to 6196. [2021-12-21 16:05:07,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6196 states, 4088 states have (on average 1.2490215264187867) internal successors, (5106), 4145 states have internal predecessors, (5106), 1819 states have call successors, (1819), 290 states have call predecessors, (1819), 288 states have return successors, (1820), 1808 states have call predecessors, (1820), 1812 states have call successors, (1820) [2021-12-21 16:05:07,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 8745 transitions. [2021-12-21 16:05:07,830 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 8745 transitions. Word has length 60 [2021-12-21 16:05:07,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:05:07,830 INFO L470 AbstractCegarLoop]: Abstraction has 6196 states and 8745 transitions. [2021-12-21 16:05:07,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 16:05:07,831 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 8745 transitions. [2021-12-21 16:05:07,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-21 16:05:07,834 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:05:07,834 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 16:05:07,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 16:05:07,835 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:05:07,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:05:07,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1653090658, now seen corresponding path program 1 times [2021-12-21 16:05:07,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:05:07,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329072084] [2021-12-21 16:05:07,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:05:07,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:05:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:07,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 16:05:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:07,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:05:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:07,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:05:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:07,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 16:05:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:07,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 16:05:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 16:05:07,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:05:07,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329072084] [2021-12-21 16:05:07,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329072084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:05:07,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:05:07,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 16:05:07,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720472937] [2021-12-21 16:05:07,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:05:07,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 16:05:07,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:05:07,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 16:05:07,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:05:07,952 INFO L87 Difference]: Start difference. First operand 6196 states and 8745 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 4 states have internal predecessors, (52), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 16:05:09,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:05:09,383 INFO L93 Difference]: Finished difference Result 17321 states and 25243 transitions. [2021-12-21 16:05:09,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:05:09,383 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 4 states have internal predecessors, (52), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 72 [2021-12-21 16:05:09,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:05:09,453 INFO L225 Difference]: With dead ends: 17321 [2021-12-21 16:05:09,454 INFO L226 Difference]: Without dead ends: 11128 [2021-12-21 16:05:09,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-21 16:05:09,489 INFO L933 BasicCegarLoop]: 1245 mSDtfsCounter, 1260 mSDsluCounter, 2235 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 863 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1412 SdHoareTripleChecker+Valid, 3480 SdHoareTripleChecker+Invalid, 1859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 863 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:05:09,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1412 Valid, 3480 Invalid, 1859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [863 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 16:05:09,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11128 states. [2021-12-21 16:05:09,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11128 to 6196. [2021-12-21 16:05:09,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6196 states, 4088 states have (on average 1.2480430528375734) internal successors, (5102), 4145 states have internal predecessors, (5102), 1819 states have call successors, (1819), 290 states have call predecessors, (1819), 288 states have return successors, (1820), 1808 states have call predecessors, (1820), 1812 states have call successors, (1820) [2021-12-21 16:05:09,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 8741 transitions. [2021-12-21 16:05:09,919 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 8741 transitions. Word has length 72 [2021-12-21 16:05:09,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:05:09,920 INFO L470 AbstractCegarLoop]: Abstraction has 6196 states and 8741 transitions. [2021-12-21 16:05:09,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 4 states have internal predecessors, (52), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 16:05:09,920 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 8741 transitions. [2021-12-21 16:05:09,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 16:05:09,925 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:05:09,925 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 16:05:09,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 16:05:09,926 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:05:09,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:05:09,926 INFO L85 PathProgramCache]: Analyzing trace with hash 18352340, now seen corresponding path program 1 times [2021-12-21 16:05:09,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:05:09,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088915699] [2021-12-21 16:05:09,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:05:09,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:05:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:10,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 16:05:10,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:10,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:05:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:10,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:05:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:10,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 16:05:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:10,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 16:05:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 16:05:10,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:05:10,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088915699] [2021-12-21 16:05:10,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088915699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:05:10,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:05:10,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:05:10,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635975479] [2021-12-21 16:05:10,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:05:10,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:05:10,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:05:10,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:05:10,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:05:10,095 INFO L87 Difference]: Start difference. First operand 6196 states and 8741 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 16:05:11,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:05:11,490 INFO L93 Difference]: Finished difference Result 12631 states and 17904 transitions. [2021-12-21 16:05:11,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 16:05:11,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2021-12-21 16:05:11,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:05:11,513 INFO L225 Difference]: With dead ends: 12631 [2021-12-21 16:05:11,514 INFO L226 Difference]: Without dead ends: 6438 [2021-12-21 16:05:11,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 16:05:11,539 INFO L933 BasicCegarLoop]: 1395 mSDtfsCounter, 838 mSDsluCounter, 2047 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 511 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 511 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:05:11,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [995 Valid, 3442 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [511 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 16:05:11,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6438 states. [2021-12-21 16:05:11,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6438 to 6183. [2021-12-21 16:05:11,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6183 states, 4080 states have (on average 1.2475490196078431) internal successors, (5090), 4138 states have internal predecessors, (5090), 1815 states have call successors, (1815), 288 states have call predecessors, (1815), 287 states have return successors, (1810), 1804 states have call predecessors, (1810), 1806 states have call successors, (1810) [2021-12-21 16:05:11,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6183 states to 6183 states and 8715 transitions. [2021-12-21 16:05:11,854 INFO L78 Accepts]: Start accepts. Automaton has 6183 states and 8715 transitions. Word has length 73 [2021-12-21 16:05:11,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:05:11,854 INFO L470 AbstractCegarLoop]: Abstraction has 6183 states and 8715 transitions. [2021-12-21 16:05:11,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 16:05:11,854 INFO L276 IsEmpty]: Start isEmpty. Operand 6183 states and 8715 transitions. [2021-12-21 16:05:11,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 16:05:11,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:05:11,859 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 16:05:11,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 16:05:11,859 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:05:11,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:05:11,860 INFO L85 PathProgramCache]: Analyzing trace with hash -826119531, now seen corresponding path program 1 times [2021-12-21 16:05:11,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:05:11,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650299653] [2021-12-21 16:05:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:05:11,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:05:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:11,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 16:05:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:11,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:05:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:11,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:05:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:11,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 16:05:11,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:11,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 16:05:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 16:05:11,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:05:11,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650299653] [2021-12-21 16:05:11,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650299653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:05:11,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:05:11,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 16:05:11,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091978505] [2021-12-21 16:05:11,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:05:11,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 16:05:11,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:05:11,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 16:05:11,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:05:11,986 INFO L87 Difference]: Start difference. First operand 6183 states and 8715 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 16:05:13,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:05:13,510 INFO L93 Difference]: Finished difference Result 11211 states and 16571 transitions. [2021-12-21 16:05:13,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 16:05:13,511 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 73 [2021-12-21 16:05:13,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:05:13,558 INFO L225 Difference]: With dead ends: 11211 [2021-12-21 16:05:13,558 INFO L226 Difference]: Without dead ends: 11087 [2021-12-21 16:05:13,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-21 16:05:13,569 INFO L933 BasicCegarLoop]: 1452 mSDtfsCounter, 945 mSDsluCounter, 5945 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 718 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 7397 SdHoareTripleChecker+Invalid, 1899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 718 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:05:13,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [951 Valid, 7397 Invalid, 1899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [718 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 16:05:13,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11087 states. [2021-12-21 16:05:14,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11087 to 6150. [2021-12-21 16:05:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6150 states, 4057 states have (on average 1.2459945772738477) internal successors, (5055), 4111 states have internal predecessors, (5055), 1805 states have call successors, (1805), 288 states have call predecessors, (1805), 287 states have return successors, (1802), 1798 states have call predecessors, (1802), 1798 states have call successors, (1802) [2021-12-21 16:05:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6150 states to 6150 states and 8662 transitions. [2021-12-21 16:05:14,096 INFO L78 Accepts]: Start accepts. Automaton has 6150 states and 8662 transitions. Word has length 73 [2021-12-21 16:05:14,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:05:14,097 INFO L470 AbstractCegarLoop]: Abstraction has 6150 states and 8662 transitions. [2021-12-21 16:05:14,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-21 16:05:14,097 INFO L276 IsEmpty]: Start isEmpty. Operand 6150 states and 8662 transitions. [2021-12-21 16:05:14,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 16:05:14,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:05:14,101 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:05:14,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 16:05:14,102 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:05:14,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:05:14,103 INFO L85 PathProgramCache]: Analyzing trace with hash -672097803, now seen corresponding path program 1 times [2021-12-21 16:05:14,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:05:14,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164664167] [2021-12-21 16:05:14,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:05:14,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:05:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:14,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-21 16:05:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:14,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:05:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:14,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:05:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:14,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 16:05:14,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:14,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 16:05:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:14,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:05:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 16:05:14,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:05:14,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164664167] [2021-12-21 16:05:14,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164664167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:05:14,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:05:14,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 16:05:14,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853084526] [2021-12-21 16:05:14,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:05:14,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 16:05:14,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:05:14,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 16:05:14,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:05:14,225 INFO L87 Difference]: Start difference. First operand 6150 states and 8662 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 16:05:15,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:05:15,915 INFO L93 Difference]: Finished difference Result 11076 states and 16372 transitions. [2021-12-21 16:05:15,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 16:05:15,915 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 79 [2021-12-21 16:05:15,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:05:15,954 INFO L225 Difference]: With dead ends: 11076 [2021-12-21 16:05:15,955 INFO L226 Difference]: Without dead ends: 10980 [2021-12-21 16:05:15,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-21 16:05:15,963 INFO L933 BasicCegarLoop]: 1443 mSDtfsCounter, 937 mSDsluCounter, 5916 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 715 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 943 SdHoareTripleChecker+Valid, 7359 SdHoareTripleChecker+Invalid, 1884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 715 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 16:05:15,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [943 Valid, 7359 Invalid, 1884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [715 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 16:05:15,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10980 states. [2021-12-21 16:05:16,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10980 to 6102. [2021-12-21 16:05:16,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6102 states, 4026 states have (on average 1.2449080973671138) internal successors, (5012), 4076 states have internal predecessors, (5012), 1788 states have call successors, (1788), 287 states have call predecessors, (1788), 287 states have return successors, (1788), 1786 states have call predecessors, (1788), 1784 states have call successors, (1788) [2021-12-21 16:05:16,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6102 states to 6102 states and 8588 transitions. [2021-12-21 16:05:16,455 INFO L78 Accepts]: Start accepts. Automaton has 6102 states and 8588 transitions. Word has length 79 [2021-12-21 16:05:16,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:05:16,456 INFO L470 AbstractCegarLoop]: Abstraction has 6102 states and 8588 transitions. [2021-12-21 16:05:16,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 16:05:16,456 INFO L276 IsEmpty]: Start isEmpty. Operand 6102 states and 8588 transitions. [2021-12-21 16:05:16,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-21 16:05:16,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:05:16,461 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 16:05:16,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 16:05:16,461 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:05:16,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:05:16,461 INFO L85 PathProgramCache]: Analyzing trace with hash -265053531, now seen corresponding path program 1 times [2021-12-21 16:05:16,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:05:16,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558998191] [2021-12-21 16:05:16,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:05:16,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:05:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:16,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 16:05:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:16,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:05:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:16,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:05:16,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:16,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 16:05:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 16:05:16,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:05:16,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558998191] [2021-12-21 16:05:16,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558998191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:05:16,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:05:16,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 16:05:16,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832530156] [2021-12-21 16:05:16,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:05:16,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 16:05:16,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:05:16,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 16:05:16,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:05:16,557 INFO L87 Difference]: Start difference. First operand 6102 states and 8588 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 16:05:18,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:05:18,862 INFO L93 Difference]: Finished difference Result 18611 states and 27716 transitions. [2021-12-21 16:05:18,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 16:05:18,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 75 [2021-12-21 16:05:18,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:05:18,934 INFO L225 Difference]: With dead ends: 18611 [2021-12-21 16:05:18,934 INFO L226 Difference]: Without dead ends: 15645 [2021-12-21 16:05:18,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-21 16:05:18,957 INFO L933 BasicCegarLoop]: 1591 mSDtfsCounter, 1362 mSDsluCounter, 6696 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 8287 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 16:05:18,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1519 Valid, 8287 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [753 Valid, 1458 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 16:05:18,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15645 states. [2021-12-21 16:05:19,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15645 to 6100. [2021-12-21 16:05:19,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6100 states, 4024 states have (on average 1.2445328031809144) internal successors, (5008), 4074 states have internal predecessors, (5008), 1788 states have call successors, (1788), 287 states have call predecessors, (1788), 287 states have return successors, (1788), 1786 states have call predecessors, (1788), 1784 states have call successors, (1788) [2021-12-21 16:05:19,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6100 states to 6100 states and 8584 transitions. [2021-12-21 16:05:19,493 INFO L78 Accepts]: Start accepts. Automaton has 6100 states and 8584 transitions. Word has length 75 [2021-12-21 16:05:19,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:05:19,494 INFO L470 AbstractCegarLoop]: Abstraction has 6100 states and 8584 transitions. [2021-12-21 16:05:19,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 16:05:19,494 INFO L276 IsEmpty]: Start isEmpty. Operand 6100 states and 8584 transitions. [2021-12-21 16:05:19,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-21 16:05:19,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:05:19,500 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 16:05:19,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 16:05:19,500 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:05:19,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:05:19,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1225886074, now seen corresponding path program 1 times [2021-12-21 16:05:19,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:05:19,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041503349] [2021-12-21 16:05:19,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:05:19,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:05:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:19,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-21 16:05:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:19,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:05:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:19,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:05:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:19,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-21 16:05:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:05:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 16:05:19,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:05:19,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041503349] [2021-12-21 16:05:19,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041503349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:05:19,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:05:19,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 16:05:19,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237229111] [2021-12-21 16:05:19,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:05:19,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 16:05:19,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:05:19,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 16:05:19,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:05:19,623 INFO L87 Difference]: Start difference. First operand 6100 states and 8584 transitions. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 16:05:21,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:05:21,033 INFO L93 Difference]: Finished difference Result 8675 states and 12570 transitions. [2021-12-21 16:05:21,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 16:05:21,034 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 77 [2021-12-21 16:05:21,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:05:21,034 INFO L225 Difference]: With dead ends: 8675 [2021-12-21 16:05:21,034 INFO L226 Difference]: Without dead ends: 0 [2021-12-21 16:05:21,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-21 16:05:21,054 INFO L933 BasicCegarLoop]: 1462 mSDtfsCounter, 964 mSDsluCounter, 5915 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 700 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 7377 SdHoareTripleChecker+Invalid, 1854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 700 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:05:21,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [970 Valid, 7377 Invalid, 1854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [700 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 16:05:21,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-21 16:05:21,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-21 16:05:21,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-12-21 16:05:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-21 16:05:21,056 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 77 [2021-12-21 16:05:21,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:05:21,056 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-21 16:05:21,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 16:05:21,056 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-21 16:05:21,056 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-21 16:05:21,058 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 16:05:21,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 16:05:21,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.