./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--asb100.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a2c526-f60a-4859-80cc-5add2f5e3675/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a2c526-f60a-4859-80cc-5add2f5e3675/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a2c526-f60a-4859-80cc-5add2f5e3675/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a2c526-f60a-4859-80cc-5add2f5e3675/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--asb100.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a2c526-f60a-4859-80cc-5add2f5e3675/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a2c526-f60a-4859-80cc-5add2f5e3675/bin/utaipan-EQgc7hIp5V --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash a172742698d01ea3d6a7e277a97e7636a1425e62fd3035feb511b810f7b798f5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:54:07,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:54:07,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:54:07,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:54:07,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:54:07,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:54:07,582 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:54:07,585 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:54:07,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:54:07,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:54:07,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:54:07,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:54:07,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:54:07,593 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:54:07,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:54:07,597 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:54:07,598 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:54:07,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:54:07,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:54:07,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:54:07,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:54:07,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:54:07,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:54:07,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:54:07,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:54:07,628 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:54:07,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:54:07,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:54:07,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:54:07,633 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:54:07,634 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:54:07,635 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:54:07,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:54:07,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:54:07,640 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:54:07,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:54:07,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:54:07,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:54:07,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:54:07,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:54:07,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:54:07,645 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a2c526-f60a-4859-80cc-5add2f5e3675/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 03:54:07,694 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:54:07,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:54:07,695 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:54:07,695 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:54:07,702 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:54:07,703 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:54:07,703 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:54:07,703 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:54:07,703 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:54:07,703 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:54:07,705 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:54:07,705 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:54:07,705 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:54:07,705 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:54:07,706 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:54:07,706 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:54:07,706 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:54:07,706 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:54:07,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:54:07,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:54:07,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:54:07,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:54:07,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:54:07,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:54:07,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:54:07,709 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:54:07,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:54:07,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:54:07,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:54:07,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:54:07,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:54:07,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:54:07,713 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:54:07,713 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:54:07,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:54:07,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:54:07,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:54:07,714 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:54:07,714 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a2c526-f60a-4859-80cc-5add2f5e3675/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a2c526-f60a-4859-80cc-5add2f5e3675/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a172742698d01ea3d6a7e277a97e7636a1425e62fd3035feb511b810f7b798f5 [2021-11-23 03:54:08,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:54:08,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:54:08,034 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:54:08,035 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:54:08,036 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:54:08,037 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a2c526-f60a-4859-80cc-5add2f5e3675/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--asb100.ko-main.cil.out.i [2021-11-23 03:54:08,126 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a2c526-f60a-4859-80cc-5add2f5e3675/bin/utaipan-EQgc7hIp5V/data/33de9ff96/a73ed30ce5344fe18f54b2d30c6af2cd/FLAG2f4976c3c [2021-11-23 03:54:09,035 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:54:09,037 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a2c526-f60a-4859-80cc-5add2f5e3675/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--asb100.ko-main.cil.out.i [2021-11-23 03:54:09,097 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a2c526-f60a-4859-80cc-5add2f5e3675/bin/utaipan-EQgc7hIp5V/data/33de9ff96/a73ed30ce5344fe18f54b2d30c6af2cd/FLAG2f4976c3c [2021-11-23 03:54:09,543 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a2c526-f60a-4859-80cc-5add2f5e3675/bin/utaipan-EQgc7hIp5V/data/33de9ff96/a73ed30ce5344fe18f54b2d30c6af2cd [2021-11-23 03:54:09,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:54:09,547 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:54:09,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:54:09,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:54:09,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:54:09,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:54:09" (1/1) ... [2021-11-23 03:54:09,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fa12e0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:09, skipping insertion in model container [2021-11-23 03:54:09,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:54:09" (1/1) ... [2021-11-23 03:54:09,563 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:54:09,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:54:11,201 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a2c526-f60a-4859-80cc-5add2f5e3675/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--asb100.ko-main.cil.out.i[168612,168625] [2021-11-23 03:54:11,348 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:54:11,415 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:54:11,722 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a2c526-f60a-4859-80cc-5add2f5e3675/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--asb100.ko-main.cil.out.i[168612,168625] [2021-11-23 03:54:11,746 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:54:11,987 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:54:11,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:11 WrapperNode [2021-11-23 03:54:11,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:54:11,989 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:54:11,989 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:54:11,989 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:54:11,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:11" (1/1) ... [2021-11-23 03:54:12,110 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:11" (1/1) ... [2021-11-23 03:54:12,279 INFO L137 Inliner]: procedures = 184, calls = 1937, calls flagged for inlining = 74, calls inlined = 66, statements flattened = 5079 [2021-11-23 03:54:12,280 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:54:12,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:54:12,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:54:12,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:54:12,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:11" (1/1) ... [2021-11-23 03:54:12,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:11" (1/1) ... [2021-11-23 03:54:12,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:11" (1/1) ... [2021-11-23 03:54:12,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:11" (1/1) ... [2021-11-23 03:54:12,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:11" (1/1) ... [2021-11-23 03:54:12,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:11" (1/1) ... [2021-11-23 03:54:12,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:11" (1/1) ... [2021-11-23 03:54:12,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:54:12,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:54:12,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:54:12,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:54:12,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:11" (1/1) ... [2021-11-23 03:54:12,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:54:12,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a2c526-f60a-4859-80cc-5add2f5e3675/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:54:12,596 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a2c526-f60a-4859-80cc-5add2f5e3675/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:54:12,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a2c526-f60a-4859-80cc-5add2f5e3675/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:54:12,647 INFO L130 BoogieDeclarations]: Found specification of procedure show_fan [2021-11-23 03:54:12,648 INFO L138 BoogieDeclarations]: Found implementation of procedure show_fan [2021-11-23 03:54:12,648 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2021-11-23 03:54:12,648 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2021-11-23 03:54:12,649 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_read_word_swapped [2021-11-23 03:54:12,649 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_read_word_swapped [2021-11-23 03:54:12,649 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_update_lock_of_asb100_data [2021-11-23 03:54:12,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_update_lock_of_asb100_data [2021-11-23 03:54:12,649 INFO L130 BoogieDeclarations]: Found specification of procedure show_in_max [2021-11-23 03:54:12,649 INFO L138 BoogieDeclarations]: Found implementation of procedure show_in_max [2021-11-23 03:54:12,649 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_update_lock_of_asb100_data [2021-11-23 03:54:12,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_update_lock_of_asb100_data [2021-11-23 03:54:12,650 INFO L130 BoogieDeclarations]: Found specification of procedure set_in_max [2021-11-23 03:54:12,650 INFO L138 BoogieDeclarations]: Found implementation of procedure set_in_max [2021-11-23 03:54:12,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:54:12,650 INFO L130 BoogieDeclarations]: Found specification of procedure set_temp_hyst [2021-11-23 03:54:12,650 INFO L138 BoogieDeclarations]: Found implementation of procedure set_temp_hyst [2021-11-23 03:54:12,651 INFO L130 BoogieDeclarations]: Found specification of procedure FAN_TO_REG [2021-11-23 03:54:12,651 INFO L138 BoogieDeclarations]: Found implementation of procedure FAN_TO_REG [2021-11-23 03:54:12,651 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_remove_group [2021-11-23 03:54:12,651 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_remove_group [2021-11-23 03:54:12,651 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_get_clientdata [2021-11-23 03:54:12,651 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_get_clientdata [2021-11-23 03:54:12,651 INFO L130 BoogieDeclarations]: Found specification of procedure show_temp_hyst [2021-11-23 03:54:12,651 INFO L138 BoogieDeclarations]: Found implementation of procedure show_temp_hyst [2021-11-23 03:54:12,652 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf_temp_from_reg [2021-11-23 03:54:12,652 INFO L138 BoogieDeclarations]: Found implementation of procedure sprintf_temp_from_reg [2021-11-23 03:54:12,652 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 03:54:12,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 03:54:12,652 INFO L130 BoogieDeclarations]: Found specification of procedure asb100_update_device [2021-11-23 03:54:12,653 INFO L138 BoogieDeclarations]: Found implementation of procedure asb100_update_device [2021-11-23 03:54:12,653 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_write_word_swapped [2021-11-23 03:54:12,653 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_write_word_swapped [2021-11-23 03:54:12,653 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_lock_of_asb100_data [2021-11-23 03:54:12,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_lock_of_asb100_data [2021-11-23 03:54:12,653 INFO L130 BoogieDeclarations]: Found specification of procedure show_fan_div [2021-11-23 03:54:12,653 INFO L138 BoogieDeclarations]: Found implementation of procedure show_fan_div [2021-11-23 03:54:12,654 INFO L130 BoogieDeclarations]: Found specification of procedure set_fan_div [2021-11-23 03:54:12,654 INFO L138 BoogieDeclarations]: Found implementation of procedure set_fan_div [2021-11-23 03:54:12,654 INFO L130 BoogieDeclarations]: Found specification of procedure LM75_TEMP_TO_REG [2021-11-23 03:54:12,654 INFO L138 BoogieDeclarations]: Found implementation of procedure LM75_TEMP_TO_REG [2021-11-23 03:54:12,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:54:12,654 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 03:54:12,654 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 03:54:12,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 03:54:12,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 03:54:12,655 INFO L130 BoogieDeclarations]: Found specification of procedure show_temp [2021-11-23 03:54:12,655 INFO L138 BoogieDeclarations]: Found implementation of procedure show_temp [2021-11-23 03:54:12,656 INFO L130 BoogieDeclarations]: Found specification of procedure set_temp_max [2021-11-23 03:54:12,656 INFO L138 BoogieDeclarations]: Found implementation of procedure set_temp_max [2021-11-23 03:54:12,657 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 03:54:12,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 03:54:12,658 INFO L130 BoogieDeclarations]: Found specification of procedure IN_TO_REG [2021-11-23 03:54:12,658 INFO L138 BoogieDeclarations]: Found implementation of procedure IN_TO_REG [2021-11-23 03:54:12,659 INFO L130 BoogieDeclarations]: Found specification of procedure set_in_min [2021-11-23 03:54:12,659 INFO L138 BoogieDeclarations]: Found implementation of procedure set_in_min [2021-11-23 03:54:12,659 INFO L130 BoogieDeclarations]: Found specification of procedure asb100_write_value [2021-11-23 03:54:12,659 INFO L138 BoogieDeclarations]: Found implementation of procedure asb100_write_value [2021-11-23 03:54:12,659 INFO L130 BoogieDeclarations]: Found specification of procedure TEMP_TO_REG [2021-11-23 03:54:12,660 INFO L138 BoogieDeclarations]: Found implementation of procedure TEMP_TO_REG [2021-11-23 03:54:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:54:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-23 03:54:12,660 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-23 03:54:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure show_in_min [2021-11-23 03:54:12,660 INFO L138 BoogieDeclarations]: Found implementation of procedure show_in_min [2021-11-23 03:54:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:54:12,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:54:12,661 INFO L130 BoogieDeclarations]: Found specification of procedure set_fan_min [2021-11-23 03:54:12,661 INFO L138 BoogieDeclarations]: Found implementation of procedure set_fan_min [2021-11-23 03:54:12,661 INFO L130 BoogieDeclarations]: Found specification of procedure show_fan_min [2021-11-23 03:54:12,661 INFO L138 BoogieDeclarations]: Found implementation of procedure show_fan_min [2021-11-23 03:54:12,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:54:12,662 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_asb100_data [2021-11-23 03:54:12,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_asb100_data [2021-11-23 03:54:12,662 INFO L130 BoogieDeclarations]: Found specification of procedure show_temp_max [2021-11-23 03:54:12,662 INFO L138 BoogieDeclarations]: Found implementation of procedure show_temp_max [2021-11-23 03:54:12,662 INFO L130 BoogieDeclarations]: Found specification of procedure show_alarm [2021-11-23 03:54:12,663 INFO L138 BoogieDeclarations]: Found implementation of procedure show_alarm [2021-11-23 03:54:12,663 INFO L130 BoogieDeclarations]: Found specification of procedure SENSORS_LIMIT [2021-11-23 03:54:12,663 INFO L138 BoogieDeclarations]: Found implementation of procedure SENSORS_LIMIT [2021-11-23 03:54:12,663 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_read_byte_data [2021-11-23 03:54:12,663 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_read_byte_data [2021-11-23 03:54:12,664 INFO L130 BoogieDeclarations]: Found specification of procedure show_in [2021-11-23 03:54:12,664 INFO L138 BoogieDeclarations]: Found implementation of procedure show_in [2021-11-23 03:54:12,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:54:12,664 INFO L130 BoogieDeclarations]: Found specification of procedure kstrtol [2021-11-23 03:54:12,664 INFO L138 BoogieDeclarations]: Found implementation of procedure kstrtol [2021-11-23 03:54:12,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:54:12,665 INFO L130 BoogieDeclarations]: Found specification of procedure IN_FROM_REG [2021-11-23 03:54:12,665 INFO L138 BoogieDeclarations]: Found implementation of procedure IN_FROM_REG [2021-11-23 03:54:12,666 INFO L130 BoogieDeclarations]: Found specification of procedure kstrtoul [2021-11-23 03:54:12,666 INFO L138 BoogieDeclarations]: Found implementation of procedure kstrtoul [2021-11-23 03:54:12,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:54:12,667 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_unregister_device [2021-11-23 03:54:12,667 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_unregister_device [2021-11-23 03:54:12,667 INFO L130 BoogieDeclarations]: Found specification of procedure asb100_detect [2021-11-23 03:54:12,667 INFO L138 BoogieDeclarations]: Found implementation of procedure asb100_detect [2021-11-23 03:54:12,667 INFO L130 BoogieDeclarations]: Found specification of procedure asb100_read_value [2021-11-23 03:54:12,667 INFO L138 BoogieDeclarations]: Found implementation of procedure asb100_read_value [2021-11-23 03:54:12,669 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2021-11-23 03:54:12,669 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2021-11-23 03:54:12,669 INFO L130 BoogieDeclarations]: Found specification of procedure FAN_FROM_REG [2021-11-23 03:54:12,669 INFO L138 BoogieDeclarations]: Found implementation of procedure FAN_FROM_REG [2021-11-23 03:54:12,669 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-23 03:54:12,670 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-23 03:54:12,670 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_new_dummy [2021-11-23 03:54:12,670 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_new_dummy [2021-11-23 03:54:12,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:54:12,670 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_write_byte_data [2021-11-23 03:54:12,670 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_write_byte_data [2021-11-23 03:54:12,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:54:12,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:54:12,674 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-23 03:54:12,674 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-23 03:54:13,441 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:54:13,444 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:54:18,419 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:54:20,111 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:54:20,113 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:54:20,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:54:20 BoogieIcfgContainer [2021-11-23 03:54:20,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:54:20,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:54:20,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:54:20,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:54:20,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:54:09" (1/3) ... [2021-11-23 03:54:20,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d474e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:54:20, skipping insertion in model container [2021-11-23 03:54:20,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:11" (2/3) ... [2021-11-23 03:54:20,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d474e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:54:20, skipping insertion in model container [2021-11-23 03:54:20,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:54:20" (3/3) ... [2021-11-23 03:54:20,135 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--hwmon--asb100.ko-main.cil.out.i [2021-11-23 03:54:20,146 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:54:20,146 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:54:20,221 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:54:20,239 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:54:20,239 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:54:20,310 INFO L276 IsEmpty]: Start isEmpty. Operand has 1020 states, 690 states have (on average 1.5333333333333334) internal successors, (1058), 704 states have internal predecessors, (1058), 277 states have call successors, (277), 51 states have call predecessors, (277), 51 states have return successors, (277), 275 states have call predecessors, (277), 277 states have call successors, (277) [2021-11-23 03:54:20,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 03:54:20,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:20,330 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] [2021-11-23 03:54:20,331 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:20,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:20,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1046536679, now seen corresponding path program 1 times [2021-11-23 03:54:20,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:20,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616804664] [2021-11-23 03:54:20,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:20,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:21,203 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:21,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616804664] [2021-11-23 03:54:21,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616804664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:21,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:21,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:54:21,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570582708] [2021-11-23 03:54:21,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:21,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:21,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:21,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:21,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:21,255 INFO L87 Difference]: Start difference. First operand has 1020 states, 690 states have (on average 1.5333333333333334) internal successors, (1058), 704 states have internal predecessors, (1058), 277 states have call successors, (277), 51 states have call predecessors, (277), 51 states have return successors, (277), 275 states have call predecessors, (277), 277 states have call successors, (277) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:54:22,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:22,232 INFO L93 Difference]: Finished difference Result 3047 states and 5120 transitions. [2021-11-23 03:54:22,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:22,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2021-11-23 03:54:22,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:22,287 INFO L225 Difference]: With dead ends: 3047 [2021-11-23 03:54:22,287 INFO L226 Difference]: Without dead ends: 2024 [2021-11-23 03:54:22,324 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 [2021-11-23 03:54:22,328 INFO L933 BasicCegarLoop]: 1717 mSDtfsCounter, 1579 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1579 SdHoareTripleChecker+Valid, 3161 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:22,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1579 Valid, 3161 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:54:22,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2021-11-23 03:54:22,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 2007. [2021-11-23 03:54:22,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2007 states, 1363 states have (on average 1.5297138664710197) internal successors, (2085), 1379 states have internal predecessors, (2085), 543 states have call successors, (543), 101 states have call predecessors, (543), 100 states have return successors, (534), 530 states have call predecessors, (534), 534 states have call successors, (534) [2021-11-23 03:54:22,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 3162 transitions. [2021-11-23 03:54:22,583 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 3162 transitions. Word has length 32 [2021-11-23 03:54:22,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:22,584 INFO L470 AbstractCegarLoop]: Abstraction has 2007 states and 3162 transitions. [2021-11-23 03:54:22,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:54:22,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 3162 transitions. [2021-11-23 03:54:22,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 03:54:22,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:22,588 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] [2021-11-23 03:54:22,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:54:22,589 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:22,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:22,590 INFO L85 PathProgramCache]: Analyzing trace with hash -496954895, now seen corresponding path program 1 times [2021-11-23 03:54:22,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:22,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994662648] [2021-11-23 03:54:22,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:22,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:22,909 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:22,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994662648] [2021-11-23 03:54:22,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994662648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:22,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:22,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:54:22,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552515729] [2021-11-23 03:54:22,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:22,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:22,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:22,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:22,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:22,913 INFO L87 Difference]: Start difference. First operand 2007 states and 3162 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:54:23,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:23,598 INFO L93 Difference]: Finished difference Result 6002 states and 9454 transitions. [2021-11-23 03:54:23,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:23,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2021-11-23 03:54:23,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:23,647 INFO L225 Difference]: With dead ends: 6002 [2021-11-23 03:54:23,647 INFO L226 Difference]: Without dead ends: 3996 [2021-11-23 03:54:23,665 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 [2021-11-23 03:54:23,667 INFO L933 BasicCegarLoop]: 1728 mSDtfsCounter, 1575 mSDsluCounter, 1590 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1575 SdHoareTripleChecker+Valid, 3171 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:23,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1575 Valid, 3171 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:54:23,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3996 states. [2021-11-23 03:54:23,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3996 to 3979. [2021-11-23 03:54:23,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3979 states, 2705 states have (on average 1.5282809611829944) internal successors, (4134), 2729 states have internal predecessors, (4134), 1073 states have call successors, (1073), 201 states have call predecessors, (1073), 200 states have return successors, (1064), 1056 states have call predecessors, (1064), 1064 states have call successors, (1064) [2021-11-23 03:54:23,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3979 states to 3979 states and 6271 transitions. [2021-11-23 03:54:23,986 INFO L78 Accepts]: Start accepts. Automaton has 3979 states and 6271 transitions. Word has length 34 [2021-11-23 03:54:23,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:23,987 INFO L470 AbstractCegarLoop]: Abstraction has 3979 states and 6271 transitions. [2021-11-23 03:54:23,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:54:23,987 INFO L276 IsEmpty]: Start isEmpty. Operand 3979 states and 6271 transitions. [2021-11-23 03:54:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 03:54:23,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:23,990 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] [2021-11-23 03:54:23,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:54:23,991 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:23,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:23,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1438180659, now seen corresponding path program 1 times [2021-11-23 03:54:23,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:23,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244206979] [2021-11-23 03:54:23,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:23,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:24,267 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:24,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244206979] [2021-11-23 03:54:24,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244206979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:24,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:24,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:54:24,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009283983] [2021-11-23 03:54:24,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:24,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:24,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:24,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:24,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:24,270 INFO L87 Difference]: Start difference. First operand 3979 states and 6271 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:54:26,933 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 03:54:27,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:27,320 INFO L93 Difference]: Finished difference Result 11850 states and 18677 transitions. [2021-11-23 03:54:27,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:27,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2021-11-23 03:54:27,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:27,398 INFO L225 Difference]: With dead ends: 11850 [2021-11-23 03:54:27,398 INFO L226 Difference]: Without dead ends: 7872 [2021-11-23 03:54:27,426 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 [2021-11-23 03:54:27,430 INFO L933 BasicCegarLoop]: 1734 mSDtfsCounter, 1550 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1552 SdHoareTripleChecker+Valid, 3178 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:27,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1552 Valid, 3178 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 304 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 03:54:27,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7872 states. [2021-11-23 03:54:27,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7872 to 7851. [2021-11-23 03:54:27,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7851 states, 5349 states have (on average 1.5288839035333708) internal successors, (8178), 5389 states have internal predecessors, (8178), 2105 states have call successors, (2105), 401 states have call predecessors, (2105), 396 states have return successors, (2096), 2076 states have call predecessors, (2096), 2096 states have call successors, (2096) [2021-11-23 03:54:27,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7851 states to 7851 states and 12379 transitions. [2021-11-23 03:54:27,913 INFO L78 Accepts]: Start accepts. Automaton has 7851 states and 12379 transitions. Word has length 35 [2021-11-23 03:54:27,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:27,913 INFO L470 AbstractCegarLoop]: Abstraction has 7851 states and 12379 transitions. [2021-11-23 03:54:27,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:54:27,914 INFO L276 IsEmpty]: Start isEmpty. Operand 7851 states and 12379 transitions. [2021-11-23 03:54:27,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 03:54:27,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:27,916 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] [2021-11-23 03:54:27,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:54:27,916 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:27,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:27,917 INFO L85 PathProgramCache]: Analyzing trace with hash 990886339, now seen corresponding path program 1 times [2021-11-23 03:54:27,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:27,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358366788] [2021-11-23 03:54:27,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:27,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:28,265 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:28,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358366788] [2021-11-23 03:54:28,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358366788] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:28,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:28,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:54:28,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117402293] [2021-11-23 03:54:28,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:28,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:28,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:28,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:28,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:28,269 INFO L87 Difference]: Start difference. First operand 7851 states and 12379 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:54:31,261 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 03:54:31,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:31,663 INFO L93 Difference]: Finished difference Result 23486 states and 37021 transitions. [2021-11-23 03:54:31,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:31,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-11-23 03:54:31,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:31,830 INFO L225 Difference]: With dead ends: 23486 [2021-11-23 03:54:31,831 INFO L226 Difference]: Without dead ends: 15636 [2021-11-23 03:54:31,898 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 [2021-11-23 03:54:31,905 INFO L933 BasicCegarLoop]: 1834 mSDtfsCounter, 1578 mSDsluCounter, 1590 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1578 SdHoareTripleChecker+Valid, 3277 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:31,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1578 Valid, 3277 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 317 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 03:54:31,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15636 states. [2021-11-23 03:54:32,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15636 to 15619. [2021-11-23 03:54:32,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15619 states, 10641 states have (on average 1.527488018043417) internal successors, (16254), 10713 states have internal predecessors, (16254), 4185 states have call successors, (4185), 801 states have call predecessors, (4185), 792 states have return successors, (4176), 4136 states have call predecessors, (4176), 4176 states have call successors, (4176) [2021-11-23 03:54:33,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15619 states to 15619 states and 24615 transitions. [2021-11-23 03:54:33,097 INFO L78 Accepts]: Start accepts. Automaton has 15619 states and 24615 transitions. Word has length 31 [2021-11-23 03:54:33,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:33,097 INFO L470 AbstractCegarLoop]: Abstraction has 15619 states and 24615 transitions. [2021-11-23 03:54:33,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:54:33,098 INFO L276 IsEmpty]: Start isEmpty. Operand 15619 states and 24615 transitions. [2021-11-23 03:54:33,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 03:54:33,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:33,100 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] [2021-11-23 03:54:33,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:54:33,101 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:33,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:33,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1561764982, now seen corresponding path program 1 times [2021-11-23 03:54:33,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:33,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032888481] [2021-11-23 03:54:33,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:33,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:33,412 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:33,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032888481] [2021-11-23 03:54:33,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032888481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:33,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:33,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:54:33,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169717135] [2021-11-23 03:54:33,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:33,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:33,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:33,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:33,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:33,415 INFO L87 Difference]: Start difference. First operand 15619 states and 24615 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:54:36,790 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 03:54:37,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:37,414 INFO L93 Difference]: Finished difference Result 46502 states and 73265 transitions. [2021-11-23 03:54:37,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:37,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2021-11-23 03:54:37,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:37,651 INFO L225 Difference]: With dead ends: 46502 [2021-11-23 03:54:37,651 INFO L226 Difference]: Without dead ends: 30884 [2021-11-23 03:54:37,724 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 [2021-11-23 03:54:37,725 INFO L933 BasicCegarLoop]: 1839 mSDtfsCounter, 1551 mSDsluCounter, 1590 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1551 SdHoareTripleChecker+Valid, 3283 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:37,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1551 Valid, 3283 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 317 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 03:54:37,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30884 states. [2021-11-23 03:54:39,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30884 to 30867. [2021-11-23 03:54:39,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30867 states, 21065 states have (on average 1.5281272252551625) internal successors, (32190), 21201 states have internal predecessors, (32190), 8217 states have call successors, (8217), 1601 states have call predecessors, (8217), 1584 states have return successors, (8208), 8128 states have call predecessors, (8208), 8208 states have call successors, (8208) [2021-11-23 03:54:39,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30867 states to 30867 states and 48615 transitions. [2021-11-23 03:54:39,889 INFO L78 Accepts]: Start accepts. Automaton has 30867 states and 48615 transitions. Word has length 34 [2021-11-23 03:54:39,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:39,890 INFO L470 AbstractCegarLoop]: Abstraction has 30867 states and 48615 transitions. [2021-11-23 03:54:39,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:54:39,890 INFO L276 IsEmpty]: Start isEmpty. Operand 30867 states and 48615 transitions. [2021-11-23 03:54:39,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 03:54:39,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:39,894 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] [2021-11-23 03:54:39,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:54:39,895 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:39,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:39,896 INFO L85 PathProgramCache]: Analyzing trace with hash -162565216, now seen corresponding path program 1 times [2021-11-23 03:54:39,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:39,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853965537] [2021-11-23 03:54:39,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:39,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:40,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:40,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853965537] [2021-11-23 03:54:40,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853965537] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:40,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:40,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:54:40,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841752128] [2021-11-23 03:54:40,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:40,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:40,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:40,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:40,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:40,521 INFO L87 Difference]: Start difference. First operand 30867 states and 48615 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:54:44,646 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 03:54:45,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:45,469 INFO L93 Difference]: Finished difference Result 92326 states and 145393 transitions. [2021-11-23 03:54:45,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:45,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-11-23 03:54:45,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:46,079 INFO L225 Difference]: With dead ends: 92326 [2021-11-23 03:54:46,080 INFO L226 Difference]: Without dead ends: 61460 [2021-11-23 03:54:46,237 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 [2021-11-23 03:54:46,239 INFO L933 BasicCegarLoop]: 1908 mSDtfsCounter, 1576 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1578 SdHoareTripleChecker+Valid, 3351 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:46,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1578 Valid, 3351 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 325 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-11-23 03:54:46,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61460 states. [2021-11-23 03:54:49,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61460 to 61427. [2021-11-23 03:54:49,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61427 states, 41913 states have (on average 1.526924820461432) internal successors, (63998), 42177 states have internal predecessors, (63998), 16361 states have call successors, (16361), 3201 states have call predecessors, (16361), 3152 states have return successors, (16352), 16176 states have call predecessors, (16352), 16352 states have call successors, (16352) [2021-11-23 03:54:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61427 states to 61427 states and 96711 transitions. [2021-11-23 03:54:49,983 INFO L78 Accepts]: Start accepts. Automaton has 61427 states and 96711 transitions. Word has length 30 [2021-11-23 03:54:49,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:49,983 INFO L470 AbstractCegarLoop]: Abstraction has 61427 states and 96711 transitions. [2021-11-23 03:54:49,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:54:49,984 INFO L276 IsEmpty]: Start isEmpty. Operand 61427 states and 96711 transitions. [2021-11-23 03:54:49,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 03:54:49,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:49,987 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] [2021-11-23 03:54:49,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:54:49,987 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:49,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:49,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1464344391, now seen corresponding path program 1 times [2021-11-23 03:54:49,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:49,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702709614] [2021-11-23 03:54:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:49,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:50,278 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:50,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702709614] [2021-11-23 03:54:50,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702709614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:50,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:50,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:54:50,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939970646] [2021-11-23 03:54:50,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:50,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:50,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:50,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:50,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:50,281 INFO L87 Difference]: Start difference. First operand 61427 states and 96711 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:54:54,982 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 03:54:56,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:56,335 INFO L93 Difference]: Finished difference Result 184006 states and 289681 transitions. [2021-11-23 03:54:56,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:56,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2021-11-23 03:54:56,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:57,082 INFO L225 Difference]: With dead ends: 184006 [2021-11-23 03:54:57,082 INFO L226 Difference]: Without dead ends: 122580 [2021-11-23 03:54:57,366 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 [2021-11-23 03:54:57,367 INFO L933 BasicCegarLoop]: 2059 mSDtfsCounter, 1580 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1582 SdHoareTripleChecker+Valid, 3505 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:57,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1582 Valid, 3505 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 347 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 03:54:57,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122580 states. [2021-11-23 03:55:01,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122580 to 122547. [2021-11-23 03:55:02,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122547 states, 83609 states have (on average 1.5259362030403425) internal successors, (127582), 84129 states have internal predecessors, (127582), 32649 states have call successors, (32649), 6401 states have call predecessors, (32649), 6288 states have return successors, (32640), 32272 states have call predecessors, (32640), 32640 states have call successors, (32640) [2021-11-23 03:55:03,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122547 states to 122547 states and 192871 transitions. [2021-11-23 03:55:03,551 INFO L78 Accepts]: Start accepts. Automaton has 122547 states and 192871 transitions. Word has length 32 [2021-11-23 03:55:03,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:55:03,554 INFO L470 AbstractCegarLoop]: Abstraction has 122547 states and 192871 transitions. [2021-11-23 03:55:03,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:55:03,555 INFO L276 IsEmpty]: Start isEmpty. Operand 122547 states and 192871 transitions. [2021-11-23 03:55:03,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 03:55:03,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:03,558 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] [2021-11-23 03:55:03,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:55:03,559 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:03,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:03,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1050527673, now seen corresponding path program 1 times [2021-11-23 03:55:03,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:03,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132333981] [2021-11-23 03:55:03,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:03,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:03,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:55:03,876 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:55:03,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132333981] [2021-11-23 03:55:03,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132333981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:55:03,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:55:03,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:55:03,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767271501] [2021-11-23 03:55:03,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:55:03,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:55:03,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:55:03,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:55:03,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:55:03,880 INFO L87 Difference]: Start difference. First operand 122547 states and 192871 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:55:10,597 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:13,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:55:13,529 INFO L93 Difference]: Finished difference Result 366598 states and 576817 transitions. [2021-11-23 03:55:13,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:55:13,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-11-23 03:55:13,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:55:14,830 INFO L225 Difference]: With dead ends: 366598 [2021-11-23 03:55:14,830 INFO L226 Difference]: Without dead ends: 244052 [2021-11-23 03:55:15,883 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 [2021-11-23 03:55:15,884 INFO L933 BasicCegarLoop]: 2063 mSDtfsCounter, 1565 mSDsluCounter, 1589 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1567 SdHoareTripleChecker+Valid, 3506 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:55:15,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1567 Valid, 3506 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 351 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 03:55:16,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244052 states. [2021-11-23 03:55:24,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244052 to 244019. [2021-11-23 03:55:25,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244019 states, 166425 states have (on average 1.5245666216013218) internal successors, (253726), 167457 states have internal predecessors, (253726), 65033 states have call successors, (65033), 12801 states have call predecessors, (65033), 12560 states have return successors, (65024), 64272 states have call predecessors, (65024), 65024 states have call successors, (65024) [2021-11-23 03:55:27,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244019 states to 244019 states and 383783 transitions. [2021-11-23 03:55:27,703 INFO L78 Accepts]: Start accepts. Automaton has 244019 states and 383783 transitions. Word has length 41 [2021-11-23 03:55:27,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:55:27,704 INFO L470 AbstractCegarLoop]: Abstraction has 244019 states and 383783 transitions. [2021-11-23 03:55:27,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:55:27,705 INFO L276 IsEmpty]: Start isEmpty. Operand 244019 states and 383783 transitions. [2021-11-23 03:55:27,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 03:55:27,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:27,706 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] [2021-11-23 03:55:27,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:55:27,707 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:27,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:27,708 INFO L85 PathProgramCache]: Analyzing trace with hash -860987992, now seen corresponding path program 1 times [2021-11-23 03:55:27,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:27,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946457805] [2021-11-23 03:55:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:27,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:55:27,940 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:55:27,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946457805] [2021-11-23 03:55:27,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946457805] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:55:27,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:55:27,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:55:27,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001541288] [2021-11-23 03:55:27,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:55:27,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:55:27,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:55:27,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:55:27,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:55:27,943 INFO L87 Difference]: Start difference. First operand 244019 states and 383783 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)