./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--media--dvb-frontends--stv090x.ko-ldv_main0_sequence_infinite_withcheck_stateful.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_3327822e-4495-43b0-8fcc-5871335a9bac/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3327822e-4495-43b0-8fcc-5871335a9bac/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_3327822e-4495-43b0-8fcc-5871335a9bac/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3327822e-4495-43b0-8fcc-5871335a9bac/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--media--dvb-frontends--stv090x.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3327822e-4495-43b0-8fcc-5871335a9bac/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_3327822e-4495-43b0-8fcc-5871335a9bac/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 83231938a54e9ae94bbb1bd48018cfe01091365ca5db88cfd1292dc620f78e56 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:51:38,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:51:38,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:51:38,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:51:38,528 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:51:38,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:51:38,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:51:38,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:51:38,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:51:38,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:51:38,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:51:38,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:51:38,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:51:38,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:51:38,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:51:38,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:51:38,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:51:38,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:51:38,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:51:38,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:51:38,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:51:38,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:51:38,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:51:38,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:51:38,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:51:38,564 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:51:38,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:51:38,566 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:51:38,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:51:38,568 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:51:38,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:51:38,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:51:38,571 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:51:38,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:51:38,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:51:38,573 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:51:38,574 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:51:38,575 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:51:38,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:51:38,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:51:38,578 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:51:38,579 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3327822e-4495-43b0-8fcc-5871335a9bac/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:51:38,627 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:51:38,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:51:38,628 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:51:38,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:51:38,629 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:51:38,629 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:51:38,630 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:51:38,630 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:51:38,630 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:51:38,630 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:51:38,630 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:51:38,631 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:51:38,631 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:51:38,631 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:51:38,631 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:51:38,632 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:51:38,632 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:51:38,635 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:51:38,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:51:38,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:51:38,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:51:38,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:51:38,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:51:38,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:51:38,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:51:38,639 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:51:38,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:51:38,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:51:38,641 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:51:38,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:51:38,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:51:38,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:51:38,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:51:38,643 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:51:38,643 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:51:38,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:51:38,644 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:51:38,645 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:51:38,653 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_3327822e-4495-43b0-8fcc-5871335a9bac/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3327822e-4495-43b0-8fcc-5871335a9bac/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83231938a54e9ae94bbb1bd48018cfe01091365ca5db88cfd1292dc620f78e56 [2021-11-23 02:51:38,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:51:39,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:51:39,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:51:39,062 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:51:39,063 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:51:39,065 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3327822e-4495-43b0-8fcc-5871335a9bac/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--media--dvb-frontends--stv090x.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2021-11-23 02:51:39,157 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3327822e-4495-43b0-8fcc-5871335a9bac/bin/utaipan-EQgc7hIp5V/data/69f50f5f7/82b48196713f41a898eb75a917961751/FLAG732abd343 [2021-11-23 02:51:40,430 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:51:40,432 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3327822e-4495-43b0-8fcc-5871335a9bac/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--media--dvb-frontends--stv090x.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2021-11-23 02:51:40,502 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3327822e-4495-43b0-8fcc-5871335a9bac/bin/utaipan-EQgc7hIp5V/data/69f50f5f7/82b48196713f41a898eb75a917961751/FLAG732abd343 [2021-11-23 02:51:40,633 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3327822e-4495-43b0-8fcc-5871335a9bac/bin/utaipan-EQgc7hIp5V/data/69f50f5f7/82b48196713f41a898eb75a917961751 [2021-11-23 02:51:40,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:51:40,640 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:51:40,643 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:51:40,643 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:51:40,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:51:40,648 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:51:40" (1/1) ... [2021-11-23 02:51:40,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67bed5c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:40, skipping insertion in model container [2021-11-23 02:51:40,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:51:40" (1/1) ... [2021-11-23 02:51:40,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:51:40,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:51:43,375 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_3327822e-4495-43b0-8fcc-5871335a9bac/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--media--dvb-frontends--stv090x.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i[419026,419039] [2021-11-23 02:51:43,511 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:51:43,610 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:51:44,376 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_3327822e-4495-43b0-8fcc-5871335a9bac/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--media--dvb-frontends--stv090x.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i[419026,419039] [2021-11-23 02:51:44,398 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:51:44,566 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:51:44,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:44 WrapperNode [2021-11-23 02:51:44,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:51:44,568 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:51:44,569 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:51:44,569 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:51:44,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:44" (1/1) ... [2021-11-23 02:51:44,831 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:44" (1/1) ... [2021-11-23 02:51:45,373 INFO L137 Inliner]: procedures = 170, calls = 6771, calls flagged for inlining = 68, calls inlined = 55, statements flattened = 16522 [2021-11-23 02:51:45,374 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:51:45,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:51:45,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:51:45,376 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:51:45,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:44" (1/1) ... [2021-11-23 02:51:45,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:44" (1/1) ... [2021-11-23 02:51:45,623 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:44" (1/1) ... [2021-11-23 02:51:45,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:44" (1/1) ... [2021-11-23 02:51:45,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:44" (1/1) ... [2021-11-23 02:51:45,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:44" (1/1) ... [2021-11-23 02:51:46,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:44" (1/1) ... [2021-11-23 02:51:46,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:51:46,082 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:51:46,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:51:46,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:51:46,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:44" (1/1) ... [2021-11-23 02:51:46,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:51:46,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3327822e-4495-43b0-8fcc-5871335a9bac/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:46,126 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3327822e-4495-43b0-8fcc-5871335a9bac/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:51:46,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3327822e-4495-43b0-8fcc-5871335a9bac/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:51:46,191 INFO L130 BoogieDeclarations]: Found specification of procedure find_dev [2021-11-23 02:51:46,191 INFO L138 BoogieDeclarations]: Found implementation of procedure find_dev [2021-11-23 02:51:46,192 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_vitclk_ctl [2021-11-23 02:51:46,192 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_vitclk_ctl [2021-11-23 02:51:46,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:51:46,192 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-23 02:51:46,192 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-23 02:51:46,193 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_send_diseqc_burst [2021-11-23 02:51:46,193 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_send_diseqc_burst [2021-11-23 02:51:46,193 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_i2c_gate_ctrl [2021-11-23 02:51:46,193 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_i2c_gate_ctrl [2021-11-23 02:51:46,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:51:46,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:51:46,194 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_get_srate [2021-11-23 02:51:46,194 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_get_srate [2021-11-23 02:51:46,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:51:46,194 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_read_per [2021-11-23 02:51:46,194 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_read_per [2021-11-23 02:51:46,195 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_demod_lock_of_stv090x_internal [2021-11-23 02:51:46,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_demod_lock_of_stv090x_internal [2021-11-23 02:51:46,195 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_activate_modcod [2021-11-23 02:51:46,195 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_activate_modcod [2021-11-23 02:51:46,195 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_dvbs_track_crl [2021-11-23 02:51:46,196 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_dvbs_track_crl [2021-11-23 02:51:46,196 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:51:46,196 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:51:46,196 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_set_viterbi [2021-11-23 02:51:46,196 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_set_viterbi [2021-11-23 02:51:46,197 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_read_signal_strength [2021-11-23 02:51:46,197 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_read_signal_strength [2021-11-23 02:51:46,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:51:46,197 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 02:51:46,197 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 02:51:46,198 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_send_diseqc_msg [2021-11-23 02:51:46,198 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_send_diseqc_msg [2021-11-23 02:51:46,198 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 02:51:46,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 02:51:46,199 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_set_vit_thacq [2021-11-23 02:51:46,199 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_set_vit_thacq [2021-11-23 02:51:46,199 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_car_width [2021-11-23 02:51:46,199 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_car_width [2021-11-23 02:51:46,200 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_recv_slave_reply [2021-11-23 02:51:46,200 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_recv_slave_reply [2021-11-23 02:51:46,200 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_transfer [2021-11-23 02:51:46,200 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_transfer [2021-11-23 02:51:46,200 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:51:46,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:51:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u32~0~TO~int [2021-11-23 02:51:46,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u32~0~TO~int [2021-11-23 02:51:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_init [2021-11-23 02:51:46,203 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_init [2021-11-23 02:51:46,203 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_demod_lock_of_stv090x_internal [2021-11-23 02:51:46,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_demod_lock_of_stv090x_internal [2021-11-23 02:51:46,204 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-23 02:51:46,205 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-23 02:51:46,205 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-23 02:51:46,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-23 02:51:46,205 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_get_dmdlock [2021-11-23 02:51:46,205 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_get_dmdlock [2021-11-23 02:51:46,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:51:46,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:51:46,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:51:46,207 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_tuner_lock_of_stv090x_internal [2021-11-23 02:51:46,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_tuner_lock_of_stv090x_internal [2021-11-23 02:51:46,207 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_sleep [2021-11-23 02:51:46,207 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_sleep [2021-11-23 02:51:46,208 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_read_reg [2021-11-23 02:51:46,208 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_read_reg [2021-11-23 02:51:46,208 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_chk_signal [2021-11-23 02:51:46,208 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_chk_signal [2021-11-23 02:51:46,208 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:51:46,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:51:46,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:51:46,209 INFO L130 BoogieDeclarations]: Found specification of procedure comp2 [2021-11-23 02:51:46,209 INFO L138 BoogieDeclarations]: Found implementation of procedure comp2 [2021-11-23 02:51:46,209 INFO L130 BoogieDeclarations]: Found specification of procedure remove_dev [2021-11-23 02:51:46,210 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_dev [2021-11-23 02:51:46,210 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_search [2021-11-23 02:51:46,211 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_search [2021-11-23 02:51:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_write_reg [2021-11-23 02:51:46,211 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_write_reg [2021-11-23 02:51:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_frontend_algo [2021-11-23 02:51:46,211 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_frontend_algo [2021-11-23 02:51:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:51:46,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:51:46,213 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_read_status [2021-11-23 02:51:46,213 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_read_status [2021-11-23 02:51:46,213 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_set_vit_thtracq [2021-11-23 02:51:46,213 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_set_vit_thtracq [2021-11-23 02:51:46,214 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_chk_tmg [2021-11-23 02:51:46,214 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_chk_tmg [2021-11-23 02:51:46,215 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_read_cnr [2021-11-23 02:51:46,215 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_read_cnr [2021-11-23 02:51:46,216 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 02:51:46,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 02:51:46,216 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_set_srate [2021-11-23 02:51:46,217 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_set_srate [2021-11-23 02:51:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_activate_modcod_single [2021-11-23 02:51:46,217 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_activate_modcod_single [2021-11-23 02:51:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:51:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-11-23 02:51:46,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-11-23 02:51:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_get_viterbi [2021-11-23 02:51:46,218 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_get_viterbi [2021-11-23 02:51:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:51:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_get_mclk [2021-11-23 02:51:46,219 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_get_mclk [2021-11-23 02:51:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:51:46,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:51:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_get_lock_tmg [2021-11-23 02:51:46,220 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_get_lock_tmg [2021-11-23 02:51:47,685 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:51:47,688 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:52:04,485 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:52:16,797 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:52:16,798 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:52:16,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:52:16 BoogieIcfgContainer [2021-11-23 02:52:16,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:52:16,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:52:16,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:52:16,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:52:16,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:51:40" (1/3) ... [2021-11-23 02:52:16,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd18b68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:52:16, skipping insertion in model container [2021-11-23 02:52:16,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:51:44" (2/3) ... [2021-11-23 02:52:16,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd18b68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:52:16, skipping insertion in model container [2021-11-23 02:52:16,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:52:16" (3/3) ... [2021-11-23 02:52:16,824 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--media--dvb-frontends--stv090x.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2021-11-23 02:52:16,831 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:52:16,831 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:52:17,049 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:52:17,074 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 02:52:17,074 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:52:17,293 INFO L276 IsEmpty]: Start isEmpty. Operand has 4209 states, 2866 states have (on average 1.4410327983251918) internal successors, (4130), 2878 states have internal predecessors, (4130), 1293 states have call successors, (1293), 48 states have call predecessors, (1293), 48 states have return successors, (1293), 1292 states have call predecessors, (1293), 1293 states have call successors, (1293) [2021-11-23 02:52:17,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:52:17,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:17,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:52:17,326 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:52:17,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:17,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1078225845, now seen corresponding path program 1 times [2021-11-23 02:52:17,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:52:17,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371141321] [2021-11-23 02:52:17,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:17,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:52:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:18,670 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 02:52:18,671 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:52:18,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371141321] [2021-11-23 02:52:18,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371141321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:52:18,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:52:18,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:52:18,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579963630] [2021-11-23 02:52:18,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:52:18,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:52:18,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:52:18,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:52:18,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:52:18,786 INFO L87 Difference]: Start difference. First operand has 4209 states, 2866 states have (on average 1.4410327983251918) internal successors, (4130), 2878 states have internal predecessors, (4130), 1293 states have call successors, (1293), 48 states have call predecessors, (1293), 48 states have return successors, (1293), 1292 states have call predecessors, (1293), 1293 states have call successors, (1293) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:52:21,591 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:23,883 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:52:26,010 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:52:28,635 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:33,152 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 02:52:33,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:52:33,406 INFO L93 Difference]: Finished difference Result 12134 states and 19476 transitions. [2021-11-23 02:52:33,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:52:33,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 02:52:33,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:52:33,506 INFO L225 Difference]: With dead ends: 12134 [2021-11-23 02:52:33,506 INFO L226 Difference]: Without dead ends: 7924 [2021-11-23 02:52:33,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 02:52:33,817 INFO L933 BasicCegarLoop]: 7594 mSDtfsCounter, 6429 mSDsluCounter, 6201 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6429 SdHoareTripleChecker+Valid, 13565 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:52:33,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6429 Valid, 13565 Invalid, 486 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4 Valid, 479 Invalid, 3 Unknown, 0 Unchecked, 13.9s Time] [2021-11-23 02:52:33,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7924 states. [2021-11-23 02:52:36,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7924 to 7920. [2021-11-23 02:52:36,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7920 states, 5412 states have (on average 1.4406873614190687) internal successors, (7797), 5427 states have internal predecessors, (7797), 2415 states have call successors, (2415), 94 states have call predecessors, (2415), 92 states have return successors, (2427), 2402 states have call predecessors, (2427), 2407 states have call successors, (2427) [2021-11-23 02:52:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7920 states to 7920 states and 12639 transitions. [2021-11-23 02:52:36,859 INFO L78 Accepts]: Start accepts. Automaton has 7920 states and 12639 transitions. Word has length 6 [2021-11-23 02:52:36,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:52:36,860 INFO L470 AbstractCegarLoop]: Abstraction has 7920 states and 12639 transitions. [2021-11-23 02:52:36,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:52:36,862 INFO L276 IsEmpty]: Start isEmpty. Operand 7920 states and 12639 transitions. [2021-11-23 02:52:36,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:52:36,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:36,864 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:52:36,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:52:36,864 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:52:36,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:36,868 INFO L85 PathProgramCache]: Analyzing trace with hash -937236781, now seen corresponding path program 1 times [2021-11-23 02:52:36,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:52:36,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146343402] [2021-11-23 02:52:36,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:36,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:52:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:37,304 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 02:52:37,305 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:52:37,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146343402] [2021-11-23 02:52:37,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146343402] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:52:37,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:52:37,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:52:37,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998116016] [2021-11-23 02:52:37,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:52:37,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:52:37,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:52:37,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:52:37,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:52:37,309 INFO L87 Difference]: Start difference. First operand 7920 states and 12639 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:52:40,057 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:42,281 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:52:44,453 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:52:46,895 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:52:49,773 WARN L534 Checker$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 02:52:50,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:52:50,308 INFO L93 Difference]: Finished difference Result 13659 states and 21770 transitions. [2021-11-23 02:52:50,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:52:50,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 02:52:50,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:52:50,493 INFO L225 Difference]: With dead ends: 13659 [2021-11-23 02:52:50,493 INFO L226 Difference]: Without dead ends: 13656 [2021-11-23 02:52:50,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 02:52:50,522 INFO L933 BasicCegarLoop]: 7379 mSDtfsCounter, 6349 mSDsluCounter, 5035 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6354 SdHoareTripleChecker+Valid, 12251 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:52:50,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6354 Valid, 12251 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 403 Invalid, 5 Unknown, 0 Unchecked, 12.6s Time] [2021-11-23 02:52:50,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13656 states. [2021-11-23 02:52:53,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13656 to 13639. [2021-11-23 02:52:53,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13639 states, 9339 states have (on average 1.4405182567726738) internal successors, (13453), 9359 states have internal predecessors, (13453), 4138 states have call successors, (4138), 161 states have call predecessors, (4138), 161 states have return successors, (4156), 4124 states have call predecessors, (4156), 4131 states have call successors, (4156) [2021-11-23 02:52:53,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13639 states to 13639 states and 21747 transitions. [2021-11-23 02:52:53,354 INFO L78 Accepts]: Start accepts. Automaton has 13639 states and 21747 transitions. Word has length 7 [2021-11-23 02:52:53,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:52:53,354 INFO L470 AbstractCegarLoop]: Abstraction has 13639 states and 21747 transitions. [2021-11-23 02:52:53,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:52:53,355 INFO L276 IsEmpty]: Start isEmpty. Operand 13639 states and 21747 transitions. [2021-11-23 02:52:53,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 02:52:53,356 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:52:53,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:52:53,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:52:53,357 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:52:53,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:52:53,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1007936120, now seen corresponding path program 1 times [2021-11-23 02:52:53,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:52:53,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059943738] [2021-11-23 02:52:53,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:52:53,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:52:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:52:53,845 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 02:52:53,845 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:52:53,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059943738] [2021-11-23 02:52:53,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059943738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:52:53,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:52:53,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:52:53,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274862367] [2021-11-23 02:52:53,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:52:53,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:52:53,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:52:53,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:52:53,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:52:53,857 INFO L87 Difference]: Start difference. First operand 13639 states and 21747 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:52:55,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:52:58,208 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:53:00,374 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:53:02,738 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:53:05,827 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:53:08,956 WARN L534 Checker$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 02:53:09,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:53:09,313 INFO L93 Difference]: Finished difference Result 17481 states and 27773 transitions. [2021-11-23 02:53:09,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:53:09,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 02:53:09,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:53:09,679 INFO L225 Difference]: With dead ends: 17481 [2021-11-23 02:53:09,680 INFO L226 Difference]: Without dead ends: 17478 [2021-11-23 02:53:09,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 02:53:09,689 INFO L933 BasicCegarLoop]: 7377 mSDtfsCounter, 6351 mSDsluCounter, 5038 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6353 SdHoareTripleChecker+Valid, 12249 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:53:09,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6353 Valid, 12249 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 407 Invalid, 4 Unknown, 0 Unchecked, 15.1s Time] [2021-11-23 02:53:09,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17478 states. [2021-11-23 02:53:12,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17478 to 17454. [2021-11-23 02:53:12,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17454 states, 11955 states have (on average 1.4357172731074863) internal successors, (17164), 11984 states have internal predecessors, (17164), 5279 states have call successors, (5279), 219 states have call predecessors, (5279), 219 states have return successors, (5298), 5258 states have call predecessors, (5298), 5273 states have call successors, (5298) [2021-11-23 02:53:12,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17454 states to 17454 states and 27741 transitions. [2021-11-23 02:53:12,668 INFO L78 Accepts]: Start accepts. Automaton has 17454 states and 27741 transitions. Word has length 8 [2021-11-23 02:53:12,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:53:12,668 INFO L470 AbstractCegarLoop]: Abstraction has 17454 states and 27741 transitions. [2021-11-23 02:53:12,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:53:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 17454 states and 27741 transitions. [2021-11-23 02:53:12,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:53:12,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:53:12,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:53:12,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:53:12,670 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:53:12,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:53:12,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1178758774, now seen corresponding path program 1 times [2021-11-23 02:53:12,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:53:12,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594862224] [2021-11-23 02:53:12,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:12,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:53:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:13,026 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 02:53:13,026 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:53:13,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594862224] [2021-11-23 02:53:13,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594862224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:53:13,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:53:13,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:53:13,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280785849] [2021-11-23 02:53:13,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:53:13,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:53:13,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:53:13,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:53:13,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:53:13,029 INFO L87 Difference]: Start difference. First operand 17454 states and 27741 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:53:17,176 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:53:19,450 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:53:21,633 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:53:25,221 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:53:27,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:53:27,284 INFO L93 Difference]: Finished difference Result 52243 states and 83598 transitions. [2021-11-23 02:53:27,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:53:27,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 02:53:27,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:53:27,803 INFO L225 Difference]: With dead ends: 52243 [2021-11-23 02:53:27,803 INFO L226 Difference]: Without dead ends: 34786 [2021-11-23 02:53:27,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 02:53:27,989 INFO L933 BasicCegarLoop]: 7821 mSDtfsCounter, 6653 mSDsluCounter, 6724 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6653 SdHoareTripleChecker+Valid, 14306 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:53:27,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6653 Valid, 14306 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 490 Invalid, 3 Unknown, 0 Unchecked, 13.4s Time] [2021-11-23 02:53:28,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34786 states. [2021-11-23 02:53:33,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34786 to 34760. [2021-11-23 02:53:33,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34760 states, 23824 states have (on average 1.4360728676964405) internal successors, (34213), 23877 states have internal predecessors, (34213), 10511 states have call successors, (10511), 424 states have call predecessors, (10511), 424 states have return successors, (10880), 10474 states have call predecessors, (10880), 10503 states have call successors, (10880) [2021-11-23 02:53:33,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34760 states to 34760 states and 55604 transitions. [2021-11-23 02:53:33,967 INFO L78 Accepts]: Start accepts. Automaton has 34760 states and 55604 transitions. Word has length 9 [2021-11-23 02:53:33,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:53:33,968 INFO L470 AbstractCegarLoop]: Abstraction has 34760 states and 55604 transitions. [2021-11-23 02:53:33,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:53:33,969 INFO L276 IsEmpty]: Start isEmpty. Operand 34760 states and 55604 transitions. [2021-11-23 02:53:33,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 02:53:33,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:53:33,982 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:53:33,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:53:33,983 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:53:33,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:53:33,984 INFO L85 PathProgramCache]: Analyzing trace with hash -2144597385, now seen corresponding path program 1 times [2021-11-23 02:53:33,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:53:33,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952363790] [2021-11-23 02:53:33,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:33,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:53:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:53:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:53:34,561 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:53:34,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952363790] [2021-11-23 02:53:34,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952363790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:53:34,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:53:34,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:53:34,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973839581] [2021-11-23 02:53:34,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:53:34,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:53:34,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:53:34,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:53:34,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:53:34,565 INFO L87 Difference]: Start difference. First operand 34760 states and 55604 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:53:39,027 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:53:40,119 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:53:41,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:53:43,756 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:53:45,901 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:53:47,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:53:51,805 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 02:53:52,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:53:52,844 INFO L93 Difference]: Finished difference Result 70130 states and 112973 transitions. [2021-11-23 02:53:52,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:53:52,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 53 [2021-11-23 02:53:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:53:53,110 INFO L225 Difference]: With dead ends: 70130 [2021-11-23 02:53:53,110 INFO L226 Difference]: Without dead ends: 35371 [2021-11-23 02:53:54,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:53:54,094 INFO L933 BasicCegarLoop]: 6435 mSDtfsCounter, 160 mSDsluCounter, 19858 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 49 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 25583 SdHoareTripleChecker+Invalid, 1162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:53:54,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 25583 Invalid, 1162 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [49 Valid, 1110 Invalid, 3 Unknown, 0 Unchecked, 16.6s Time] [2021-11-23 02:53:54,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35371 states. [2021-11-23 02:53:59,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35371 to 35300. [2021-11-23 02:53:59,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35300 states, 24226 states have (on average 1.4323041360521753) internal successors, (34699), 24285 states have internal predecessors, (34699), 10631 states have call successors, (10631), 436 states have call predecessors, (10631), 442 states have return successors, (11079), 10594 states have call predecessors, (11079), 10623 states have call successors, (11079) [2021-11-23 02:53:59,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35300 states to 35300 states and 56409 transitions. [2021-11-23 02:53:59,844 INFO L78 Accepts]: Start accepts. Automaton has 35300 states and 56409 transitions. Word has length 53 [2021-11-23 02:53:59,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:53:59,846 INFO L470 AbstractCegarLoop]: Abstraction has 35300 states and 56409 transitions. [2021-11-23 02:53:59,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:53:59,847 INFO L276 IsEmpty]: Start isEmpty. Operand 35300 states and 56409 transitions. [2021-11-23 02:53:59,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 02:53:59,853 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:53:59,854 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:53:59,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:53:59,854 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:53:59,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:53:59,855 INFO L85 PathProgramCache]: Analyzing trace with hash 544504532, now seen corresponding path program 1 times [2021-11-23 02:53:59,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:53:59,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142571178] [2021-11-23 02:53:59,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:53:59,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:54:00,781 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:00,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142571178] [2021-11-23 02:54:00,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142571178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:00,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:00,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:54:00,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955417866] [2021-11-23 02:54:00,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:00,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:54:00,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:00,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:54:00,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:54:00,787 INFO L87 Difference]: Start difference. First operand 35300 states and 56409 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:54:06,259 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:54:08,420 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:54:10,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:10,998 INFO L93 Difference]: Finished difference Result 35398 states and 56524 transitions. [2021-11-23 02:54:11,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:54:11,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2021-11-23 02:54:11,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:11,166 INFO L225 Difference]: With dead ends: 35398 [2021-11-23 02:54:11,166 INFO L226 Difference]: Without dead ends: 35395 [2021-11-23 02:54:11,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 02:54:11,199 INFO L933 BasicCegarLoop]: 6459 mSDtfsCounter, 224 mSDsluCounter, 6484 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 12713 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:11,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 12713 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 478 Invalid, 2 Unknown, 0 Unchecked, 9.3s Time] [2021-11-23 02:54:11,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35395 states. [2021-11-23 02:54:16,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35395 to 35395. [2021-11-23 02:54:16,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35395 states, 24288 states have (on average 1.4318593544137022) internal successors, (34777), 24346 states have internal predecessors, (34777), 10646 states have call successors, (10646), 454 states have call predecessors, (10646), 460 states have return successors, (11095), 10610 states have call predecessors, (11095), 10639 states have call successors, (11095) [2021-11-23 02:54:16,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35395 states to 35395 states and 56518 transitions. [2021-11-23 02:54:16,557 INFO L78 Accepts]: Start accepts. Automaton has 35395 states and 56518 transitions. Word has length 54 [2021-11-23 02:54:16,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:16,558 INFO L470 AbstractCegarLoop]: Abstraction has 35395 states and 56518 transitions. [2021-11-23 02:54:16,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:54:16,558 INFO L276 IsEmpty]: Start isEmpty. Operand 35395 states and 56518 transitions. [2021-11-23 02:54:16,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 02:54:16,565 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:16,566 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:16,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:54:16,566 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:54:16,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:16,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1689897456, now seen corresponding path program 1 times [2021-11-23 02:54:16,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:16,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418521863] [2021-11-23 02:54:16,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:16,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:54:20,222 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:20,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418521863] [2021-11-23 02:54:20,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418521863] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:20,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:20,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:54:20,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820406842] [2021-11-23 02:54:20,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:20,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:54:20,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:20,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:54:20,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:54:20,225 INFO L87 Difference]: Start difference. First operand 35395 states and 56518 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:54:23,227 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:54:24,241 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:54:26,562 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:54:30,471 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 02:54:31,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:31,387 INFO L93 Difference]: Finished difference Result 70805 states and 120504 transitions. [2021-11-23 02:54:31,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:54:31,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2021-11-23 02:54:31,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:31,561 INFO L225 Difference]: With dead ends: 70805 [2021-11-23 02:54:31,562 INFO L226 Difference]: Without dead ends: 35411 [2021-11-23 02:54:32,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 02:54:32,017 INFO L933 BasicCegarLoop]: 6455 mSDtfsCounter, 0 mSDsluCounter, 6692 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12907 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:32,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12907 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 486 Invalid, 2 Unknown, 0 Unchecked, 9.9s Time] [2021-11-23 02:54:32,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35411 states. [2021-11-23 02:54:37,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35411 to 35411. [2021-11-23 02:54:37,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35411 states, 24304 states have (on average 1.4315750493745885) internal successors, (34793), 24362 states have internal predecessors, (34793), 10646 states have call successors, (10646), 454 states have call predecessors, (10646), 460 states have return successors, (11095), 10610 states have call predecessors, (11095), 10639 states have call successors, (11095) [2021-11-23 02:54:37,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35411 states to 35411 states and 56534 transitions. [2021-11-23 02:54:37,661 INFO L78 Accepts]: Start accepts. Automaton has 35411 states and 56534 transitions. Word has length 58 [2021-11-23 02:54:37,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:37,661 INFO L470 AbstractCegarLoop]: Abstraction has 35411 states and 56534 transitions. [2021-11-23 02:54:37,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:54:37,662 INFO L276 IsEmpty]: Start isEmpty. Operand 35411 states and 56534 transitions. [2021-11-23 02:54:37,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-23 02:54:37,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:37,666 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:37,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:54:37,666 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:54:37,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:37,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1933143808, now seen corresponding path program 1 times [2021-11-23 02:54:37,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:37,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891994359] [2021-11-23 02:54:37,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:37,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:54:38,863 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:38,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891994359] [2021-11-23 02:54:38,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891994359] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:38,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:38,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:54:38,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605321092] [2021-11-23 02:54:38,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:38,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:54:38,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:38,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:54:38,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:54:38,866 INFO L87 Difference]: Start difference. First operand 35411 states and 56534 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:54:42,158 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:54:43,183 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:54:45,454 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:54:48,049 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:54:51,263 WARN L534 Checker$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 02:54:52,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:52,312 INFO L93 Difference]: Finished difference Result 70837 states and 120536 transitions. [2021-11-23 02:54:52,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:54:52,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 59 [2021-11-23 02:54:52,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:52,537 INFO L225 Difference]: With dead ends: 70837 [2021-11-23 02:54:52,537 INFO L226 Difference]: Without dead ends: 35427 [2021-11-23 02:54:52,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:54:52,890 INFO L933 BasicCegarLoop]: 6453 mSDtfsCounter, 10 mSDsluCounter, 6689 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12903 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:52,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12903 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 488 Invalid, 3 Unknown, 0 Unchecked, 11.8s Time] [2021-11-23 02:54:52,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35427 states. [2021-11-23 02:54:58,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35427 to 35427. [2021-11-23 02:54:58,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35427 states, 24320 states have (on average 1.4312911184210526) internal successors, (34809), 24378 states have internal predecessors, (34809), 10646 states have call successors, (10646), 454 states have call predecessors, (10646), 460 states have return successors, (11095), 10610 states have call predecessors, (11095), 10639 states have call successors, (11095) [2021-11-23 02:54:58,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35427 states to 35427 states and 56550 transitions. [2021-11-23 02:54:58,302 INFO L78 Accepts]: Start accepts. Automaton has 35427 states and 56550 transitions. Word has length 59 [2021-11-23 02:54:58,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:58,302 INFO L470 AbstractCegarLoop]: Abstraction has 35427 states and 56550 transitions. [2021-11-23 02:54:58,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:54:58,302 INFO L276 IsEmpty]: Start isEmpty. Operand 35427 states and 56550 transitions. [2021-11-23 02:54:58,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 02:54:58,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:58,306 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:58,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:54:58,307 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:54:58,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:58,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1677215838, now seen corresponding path program 1 times [2021-11-23 02:54:58,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:58,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128828014] [2021-11-23 02:54:58,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:58,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms