./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.7.3/main0_drivers--media--dvb-frontends--stv090x-ko---32_7a--linux-3.7.3.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_a355b17e-a292-4097-b6be-8ce92941c937/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a355b17e-a292-4097-b6be-8ce92941c937/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_a355b17e-a292-4097-b6be-8ce92941c937/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a355b17e-a292-4097-b6be-8ce92941c937/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.7.3/main0_drivers--media--dvb-frontends--stv090x-ko---32_7a--linux-3.7.3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a355b17e-a292-4097-b6be-8ce92941c937/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_a355b17e-a292-4097-b6be-8ce92941c937/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 1edb128dac5f1749a8164cdbec3766f388b8d95e25a83a97d25b5ef9e1604ba3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:24:31,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:24:31,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:24:31,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:24:31,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:24:31,686 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:24:31,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:24:31,693 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:24:31,696 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:24:31,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:24:31,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:24:31,706 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:24:31,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:24:31,710 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:24:31,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:24:31,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:24:31,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:24:31,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:24:31,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:24:31,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:24:31,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:24:31,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:24:31,743 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:24:31,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:24:31,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:24:31,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:24:31,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:24:31,758 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:24:31,759 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:24:31,760 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:24:31,761 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:24:31,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:24:31,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:24:31,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:24:31,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:24:31,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:24:31,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:24:31,770 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:24:31,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:24:31,771 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:24:31,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:24:31,773 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a355b17e-a292-4097-b6be-8ce92941c937/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:24:31,830 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:24:31,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:24:31,831 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:24:31,831 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:24:31,832 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:24:31,833 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:24:31,833 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:24:31,833 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:24:31,833 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:24:31,834 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:24:31,834 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:24:31,834 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:24:31,834 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:24:31,834 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:24:31,835 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:24:31,835 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:24:31,835 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:24:31,835 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:24:31,836 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:24:31,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:24:31,837 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:24:31,837 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:24:31,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:24:31,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:24:31,838 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:24:31,838 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:24:31,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:24:31,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:24:31,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:24:31,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:24:31,839 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:24:31,839 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:24:31,839 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:24:31,840 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:24:31,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:24:31,840 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:24:31,840 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:24:31,841 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:24:31,841 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_a355b17e-a292-4097-b6be-8ce92941c937/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a355b17e-a292-4097-b6be-8ce92941c937/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1edb128dac5f1749a8164cdbec3766f388b8d95e25a83a97d25b5ef9e1604ba3 [2021-11-23 02:24:32,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:24:32,131 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:24:32,134 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:24:32,137 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:24:32,137 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:24:32,139 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a355b17e-a292-4097-b6be-8ce92941c937/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-3.7.3/main0_drivers--media--dvb-frontends--stv090x-ko---32_7a--linux-3.7.3.i [2021-11-23 02:24:32,218 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a355b17e-a292-4097-b6be-8ce92941c937/bin/utaipan-EQgc7hIp5V/data/a801dae60/8d1be1d24ec34eb6990f23c5f94901d9/FLAG41c62789b [2021-11-23 02:24:33,252 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:24:33,253 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a355b17e-a292-4097-b6be-8ce92941c937/sv-benchmarks/c/ldv-linux-3.7.3/main0_drivers--media--dvb-frontends--stv090x-ko---32_7a--linux-3.7.3.i [2021-11-23 02:24:33,332 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a355b17e-a292-4097-b6be-8ce92941c937/bin/utaipan-EQgc7hIp5V/data/a801dae60/8d1be1d24ec34eb6990f23c5f94901d9/FLAG41c62789b [2021-11-23 02:24:33,642 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a355b17e-a292-4097-b6be-8ce92941c937/bin/utaipan-EQgc7hIp5V/data/a801dae60/8d1be1d24ec34eb6990f23c5f94901d9 [2021-11-23 02:24:33,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:24:33,646 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:24:33,647 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:24:33,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:24:33,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:24:33,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:24:33" (1/1) ... [2021-11-23 02:24:33,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23376b02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:33, skipping insertion in model container [2021-11-23 02:24:33,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:24:33" (1/1) ... [2021-11-23 02:24:33,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:24:33,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:24:36,386 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_a355b17e-a292-4097-b6be-8ce92941c937/sv-benchmarks/c/ldv-linux-3.7.3/main0_drivers--media--dvb-frontends--stv090x-ko---32_7a--linux-3.7.3.i[424236,424249] [2021-11-23 02:24:36,592 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:24:36,665 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:24:37,365 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_a355b17e-a292-4097-b6be-8ce92941c937/sv-benchmarks/c/ldv-linux-3.7.3/main0_drivers--media--dvb-frontends--stv090x-ko---32_7a--linux-3.7.3.i[424236,424249] [2021-11-23 02:24:37,376 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:24:37,515 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:24:37,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:37 WrapperNode [2021-11-23 02:24:37,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:24:37,517 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:24:37,517 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:24:37,517 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:24:37,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:37" (1/1) ... [2021-11-23 02:24:37,801 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:37" (1/1) ... [2021-11-23 02:24:38,442 INFO L137 Inliner]: procedures = 189, calls = 6921, calls flagged for inlining = 69, calls inlined = 54, statements flattened = 16566 [2021-11-23 02:24:38,443 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:24:38,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:24:38,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:24:38,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:24:38,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:37" (1/1) ... [2021-11-23 02:24:38,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:37" (1/1) ... [2021-11-23 02:24:38,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:37" (1/1) ... [2021-11-23 02:24:38,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:37" (1/1) ... [2021-11-23 02:24:38,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:37" (1/1) ... [2021-11-23 02:24:38,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:37" (1/1) ... [2021-11-23 02:24:38,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:37" (1/1) ... [2021-11-23 02:24:39,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:24:39,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:24:39,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:24:39,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:24:39,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:37" (1/1) ... [2021-11-23 02:24:39,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:24:39,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a355b17e-a292-4097-b6be-8ce92941c937/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:24:39,143 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a355b17e-a292-4097-b6be-8ce92941c937/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:24:39,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a355b17e-a292-4097-b6be-8ce92941c937/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:24:39,198 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_demod_lock [2021-11-23 02:24:39,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_demod_lock [2021-11-23 02:24:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure find_dev [2021-11-23 02:24:39,199 INFO L138 BoogieDeclarations]: Found implementation of procedure find_dev [2021-11-23 02:24:39,199 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_vitclk_ctl [2021-11-23 02:24:39,199 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_vitclk_ctl [2021-11-23 02:24:39,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:24:39,200 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-23 02:24:39,200 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-23 02:24:39,200 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_send_diseqc_burst [2021-11-23 02:24:39,200 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_send_diseqc_burst [2021-11-23 02:24:39,200 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_demod_lock [2021-11-23 02:24:39,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_demod_lock [2021-11-23 02:24:39,201 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_i2c_gate_ctrl [2021-11-23 02:24:39,201 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_i2c_gate_ctrl [2021-11-23 02:24:39,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 02:24:39,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:24:39,202 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_get_srate [2021-11-23 02:24:39,202 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_get_srate [2021-11-23 02:24:39,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:24:39,202 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_read_per [2021-11-23 02:24:39,202 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_read_per [2021-11-23 02:24:39,202 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_activate_modcod [2021-11-23 02:24:39,203 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_activate_modcod [2021-11-23 02:24:39,203 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_dvbs_track_crl [2021-11-23 02:24:39,203 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_dvbs_track_crl [2021-11-23 02:24:39,203 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:24:39,203 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:24:39,204 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_set_viterbi [2021-11-23 02:24:39,204 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_set_viterbi [2021-11-23 02:24:39,204 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_read_signal_strength [2021-11-23 02:24:39,204 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_read_signal_strength [2021-11-23 02:24:39,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:24:39,205 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 02:24:39,205 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 02:24:39,205 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_send_diseqc_msg [2021-11-23 02:24:39,205 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_send_diseqc_msg [2021-11-23 02:24:39,206 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 02:24:39,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 02:24:39,206 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_set_vit_thacq [2021-11-23 02:24:39,206 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_set_vit_thacq [2021-11-23 02:24:39,206 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_car_width [2021-11-23 02:24:39,207 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_car_width [2021-11-23 02:24:39,207 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_recv_slave_reply [2021-11-23 02:24:39,207 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_recv_slave_reply [2021-11-23 02:24:39,207 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_transfer [2021-11-23 02:24:39,208 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_transfer [2021-11-23 02:24:39,208 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:24:39,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:24:39,209 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u32~0~TO~int [2021-11-23 02:24:39,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u32~0~TO~int [2021-11-23 02:24:39,210 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_init [2021-11-23 02:24:39,210 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_init [2021-11-23 02:24:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-23 02:24:39,211 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-23 02:24:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-23 02:24:39,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-23 02:24:39,211 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_get_dmdlock [2021-11-23 02:24:39,211 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_get_dmdlock [2021-11-23 02:24:39,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:24:39,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:24:39,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:24:39,213 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_sleep [2021-11-23 02:24:39,213 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_sleep [2021-11-23 02:24:39,214 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_read_reg [2021-11-23 02:24:39,214 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_read_reg [2021-11-23 02:24:39,214 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_chk_signal [2021-11-23 02:24:39,214 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_chk_signal [2021-11-23 02:24:39,214 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:24:39,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:24:39,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:24:39,215 INFO L130 BoogieDeclarations]: Found specification of procedure comp2 [2021-11-23 02:24:39,216 INFO L138 BoogieDeclarations]: Found implementation of procedure comp2 [2021-11-23 02:24:39,216 INFO L130 BoogieDeclarations]: Found specification of procedure remove_dev [2021-11-23 02:24:39,216 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_dev [2021-11-23 02:24:39,216 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_search [2021-11-23 02:24:39,217 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_search [2021-11-23 02:24:39,217 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_write_reg [2021-11-23 02:24:39,217 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_write_reg [2021-11-23 02:24:39,217 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_frontend_algo [2021-11-23 02:24:39,217 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_frontend_algo [2021-11-23 02:24:39,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:24:39,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:24:39,219 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_read_status [2021-11-23 02:24:39,219 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_read_status [2021-11-23 02:24:39,219 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_set_vit_thtracq [2021-11-23 02:24:39,219 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_set_vit_thtracq [2021-11-23 02:24:39,219 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_chk_tmg [2021-11-23 02:24:39,220 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_chk_tmg [2021-11-23 02:24:39,221 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_read_cnr [2021-11-23 02:24:39,221 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_read_cnr [2021-11-23 02:24:39,221 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 02:24:39,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 02:24:39,222 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_set_srate [2021-11-23 02:24:39,222 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_set_srate [2021-11-23 02:24:39,222 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_activate_modcod_single [2021-11-23 02:24:39,223 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_activate_modcod_single [2021-11-23 02:24:39,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:24:39,223 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-11-23 02:24:39,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-11-23 02:24:39,223 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_tuner_lock [2021-11-23 02:24:39,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_tuner_lock [2021-11-23 02:24:39,224 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_get_viterbi [2021-11-23 02:24:39,224 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_get_viterbi [2021-11-23 02:24:39,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 02:24:39,225 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_get_mclk [2021-11-23 02:24:39,225 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_get_mclk [2021-11-23 02:24:39,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:24:39,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:24:39,225 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_get_lock_tmg [2021-11-23 02:24:39,226 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_get_lock_tmg [2021-11-23 02:24:40,604 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:24:40,607 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:25:00,666 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:25:10,298 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:25:10,299 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:25:10,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:25:10 BoogieIcfgContainer [2021-11-23 02:25:10,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:25:10,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:25:10,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:25:10,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:25:10,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:24:33" (1/3) ... [2021-11-23 02:25:10,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea437be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:25:10, skipping insertion in model container [2021-11-23 02:25:10,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:37" (2/3) ... [2021-11-23 02:25:10,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea437be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:25:10, skipping insertion in model container [2021-11-23 02:25:10,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:25:10" (3/3) ... [2021-11-23 02:25:10,321 INFO L111 eAbstractionObserver]: Analyzing ICFG main0_drivers--media--dvb-frontends--stv090x-ko---32_7a--linux-3.7.3.i [2021-11-23 02:25:10,325 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:25:10,326 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:25:10,414 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:25:10,425 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 02:25:10,426 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:25:10,530 INFO L276 IsEmpty]: Start isEmpty. Operand has 4156 states, 2829 states have (on average 1.44220572640509) internal successors, (4080), 2843 states have internal predecessors, (4080), 1277 states have call successors, (1277), 48 states have call predecessors, (1277), 48 states have return successors, (1277), 1276 states have call predecessors, (1277), 1277 states have call successors, (1277) [2021-11-23 02:25:10,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:25:10,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:25:10,544 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:25:10,544 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:25:10,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:25:10,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1988632696, now seen corresponding path program 1 times [2021-11-23 02:25:10,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:25:10,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162946027] [2021-11-23 02:25:10,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:25:10,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:25:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:25:11,441 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 02:25:11,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:25:11,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162946027] [2021-11-23 02:25:11,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162946027] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:25:11,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:25:11,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:25:11,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452865059] [2021-11-23 02:25:11,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:25:11,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:25:11,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:25:11,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:25:11,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:25:11,508 INFO L87 Difference]: Start difference. First operand has 4156 states, 2829 states have (on average 1.44220572640509) internal successors, (4080), 2843 states have internal predecessors, (4080), 1277 states have call successors, (1277), 48 states have call predecessors, (1277), 48 states have return successors, (1277), 1276 states have call predecessors, (1277), 1277 states have call successors, (1277) 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 02:25:15,270 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:25:17,441 WARN L534 Checker$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 02:25:19,889 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:25:21,979 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:25:23,813 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:24,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:25:24,173 INFO L93 Difference]: Finished difference Result 11270 states and 18067 transitions. [2021-11-23 02:25:24,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:25:24,177 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 02:25:24,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:25:24,299 INFO L225 Difference]: With dead ends: 11270 [2021-11-23 02:25:24,299 INFO L226 Difference]: Without dead ends: 7113 [2021-11-23 02:25:24,378 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 02:25:24,386 INFO L933 BasicCegarLoop]: 7302 mSDtfsCounter, 6273 mSDsluCounter, 5047 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6275 SdHoareTripleChecker+Valid, 12181 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:25:24,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6275 Valid, 12181 Invalid, 408 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 405 Invalid, 3 Unknown, 0 Unchecked, 12.1s Time] [2021-11-23 02:25:24,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7113 states. [2021-11-23 02:25:26,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7113 to 7097. [2021-11-23 02:25:26,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7097 states, 4847 states have (on average 1.441510212502579) internal successors, (6987), 4864 states have internal predecessors, (6987), 2166 states have call successors, (2166), 84 states have call predecessors, (2166), 83 states have return successors, (2157), 2151 states have call predecessors, (2157), 2157 states have call successors, (2157) [2021-11-23 02:25:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7097 states to 7097 states and 11310 transitions. [2021-11-23 02:25:26,748 INFO L78 Accepts]: Start accepts. Automaton has 7097 states and 11310 transitions. Word has length 6 [2021-11-23 02:25:26,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:25:26,749 INFO L470 AbstractCegarLoop]: Abstraction has 7097 states and 11310 transitions. [2021-11-23 02:25:26,750 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 02:25:26,750 INFO L276 IsEmpty]: Start isEmpty. Operand 7097 states and 11310 transitions. [2021-11-23 02:25:26,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:25:26,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:25:26,751 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:25:26,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:25:26,752 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:25:26,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:25:26,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1515576348, now seen corresponding path program 1 times [2021-11-23 02:25:26,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:25:26,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349374717] [2021-11-23 02:25:26,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:25:26,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:25:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:25:27,323 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 02:25:27,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:25:27,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349374717] [2021-11-23 02:25:27,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349374717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:25:27,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:25:27,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:25:27,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261723581] [2021-11-23 02:25:27,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:25:27,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:25:27,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:25:27,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:25:27,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:25:27,328 INFO L87 Difference]: Start difference. First operand 7097 states and 11310 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 02:25:29,947 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:32,157 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:25:34,444 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:37,091 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:25:38,421 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:25:40,961 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 02:25:41,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:25:41,332 INFO L93 Difference]: Finished difference Result 20630 states and 32901 transitions. [2021-11-23 02:25:41,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:25:41,333 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 02:25:41,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:25:41,488 INFO L225 Difference]: With dead ends: 20630 [2021-11-23 02:25:41,489 INFO L226 Difference]: Without dead ends: 13534 [2021-11-23 02:25:41,586 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 02:25:41,596 INFO L933 BasicCegarLoop]: 7494 mSDtfsCounter, 6344 mSDsluCounter, 6105 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6344 SdHoareTripleChecker+Valid, 13376 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:25:41,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6344 Valid, 13376 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 465 Invalid, 3 Unknown, 0 Unchecked, 13.4s Time] [2021-11-23 02:25:41,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13534 states. [2021-11-23 02:25:43,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13534 to 13529. [2021-11-23 02:25:43,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13529 states, 9262 states have (on average 1.441589289570287) internal successors, (13352), 9288 states have internal predecessors, (13352), 4105 states have call successors, (4105), 164 states have call predecessors, (4105), 161 states have return successors, (4114), 4082 states have call predecessors, (4114), 4095 states have call successors, (4114) [2021-11-23 02:25:44,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13529 states to 13529 states and 21571 transitions. [2021-11-23 02:25:44,050 INFO L78 Accepts]: Start accepts. Automaton has 13529 states and 21571 transitions. Word has length 7 [2021-11-23 02:25:44,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:25:44,050 INFO L470 AbstractCegarLoop]: Abstraction has 13529 states and 21571 transitions. [2021-11-23 02:25:44,051 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 02:25:44,051 INFO L276 IsEmpty]: Start isEmpty. Operand 13529 states and 21571 transitions. [2021-11-23 02:25:44,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 02:25:44,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:25:44,052 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:25:44,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:25:44,052 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:25:44,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:25:44,052 INFO L85 PathProgramCache]: Analyzing trace with hash -264263685, now seen corresponding path program 1 times [2021-11-23 02:25:44,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:25:44,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55240408] [2021-11-23 02:25:44,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:25:44,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:25:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:25:44,466 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 02:25:44,467 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:25:44,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55240408] [2021-11-23 02:25:44,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55240408] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:25:44,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:25:44,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:25:44,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504740148] [2021-11-23 02:25:44,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:25:44,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:25:44,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:25:44,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:25:44,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:25:44,479 INFO L87 Difference]: Start difference. First operand 13529 states and 21571 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 02:25:48,092 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 02:25:50,298 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:25:53,421 WARN L534 Checker$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 02:25:55,487 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:55,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:25:55,873 INFO L93 Difference]: Finished difference Result 16494 states and 26154 transitions. [2021-11-23 02:25:55,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:25:55,874 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 02:25:55,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:25:55,998 INFO L225 Difference]: With dead ends: 16494 [2021-11-23 02:25:55,998 INFO L226 Difference]: Without dead ends: 16491 [2021-11-23 02:25:56,017 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 02:25:56,018 INFO L933 BasicCegarLoop]: 7327 mSDtfsCounter, 6573 mSDsluCounter, 5047 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6577 SdHoareTripleChecker+Valid, 12204 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:25:56,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6577 Valid, 12204 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 406 Invalid, 3 Unknown, 0 Unchecked, 11.1s Time] [2021-11-23 02:25:56,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16491 states. [2021-11-23 02:25:58,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16491 to 16450. [2021-11-23 02:25:58,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16450 states, 11270 states have (on average 1.435226264418811) internal successors, (16175), 11307 states have internal predecessors, (16175), 4954 states have call successors, (4954), 228 states have call predecessors, (4954), 225 states have return successors, (4964), 4922 states have call predecessors, (4964), 4945 states have call successors, (4964) [2021-11-23 02:25:58,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16450 states to 16450 states and 26093 transitions. [2021-11-23 02:25:58,785 INFO L78 Accepts]: Start accepts. Automaton has 16450 states and 26093 transitions. Word has length 8 [2021-11-23 02:25:58,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:25:58,787 INFO L470 AbstractCegarLoop]: Abstraction has 16450 states and 26093 transitions. [2021-11-23 02:25:58,787 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 02:25:58,787 INFO L276 IsEmpty]: Start isEmpty. Operand 16450 states and 26093 transitions. [2021-11-23 02:25:58,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:25:58,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:25:58,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:25:58,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:25:58,789 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:25:58,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:25:58,789 INFO L85 PathProgramCache]: Analyzing trace with hash 395275007, now seen corresponding path program 1 times [2021-11-23 02:25:58,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:25:58,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119834518] [2021-11-23 02:25:58,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:25:58,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:25:58,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:25:59,319 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 02:25:59,320 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:25:59,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119834518] [2021-11-23 02:25:59,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119834518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:25:59,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:25:59,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:25:59,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298108021] [2021-11-23 02:25:59,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:25:59,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:25:59,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:25:59,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:25:59,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:25:59,322 INFO L87 Difference]: Start difference. First operand 16450 states and 26093 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 02:26:01,646 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 02:26:03,800 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:26:05,950 WARN L534 Checker$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 02:26:10,719 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:11,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:26:11,342 INFO L93 Difference]: Finished difference Result 16492 states and 26144 transitions. [2021-11-23 02:26:11,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:26:11,343 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 02:26:11,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:26:11,450 INFO L225 Difference]: With dead ends: 16492 [2021-11-23 02:26:11,450 INFO L226 Difference]: Without dead ends: 16489 [2021-11-23 02:26:11,468 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 02:26:11,469 INFO L933 BasicCegarLoop]: 7316 mSDtfsCounter, 6537 mSDsluCounter, 5048 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6539 SdHoareTripleChecker+Valid, 12195 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:26:11,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6539 Valid, 12195 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 405 Invalid, 2 Unknown, 0 Unchecked, 11.7s Time] [2021-11-23 02:26:11,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16489 states. [2021-11-23 02:26:14,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16489 to 16464. [2021-11-23 02:26:14,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16464 states, 11280 states have (on average 1.4351063829787234) internal successors, (16188), 11316 states have internal predecessors, (16188), 4955 states have call successors, (4955), 231 states have call predecessors, (4955), 228 states have return successors, (4966), 4924 states have call predecessors, (4966), 4947 states have call successors, (4966) [2021-11-23 02:26:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16464 states to 16464 states and 26109 transitions. [2021-11-23 02:26:14,516 INFO L78 Accepts]: Start accepts. Automaton has 16464 states and 26109 transitions. Word has length 9 [2021-11-23 02:26:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:26:14,517 INFO L470 AbstractCegarLoop]: Abstraction has 16464 states and 26109 transitions. [2021-11-23 02:26:14,517 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 02:26:14,518 INFO L276 IsEmpty]: Start isEmpty. Operand 16464 states and 26109 transitions. [2021-11-23 02:26:14,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:26:14,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:14,519 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:26:14,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:26:14,520 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:14,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:14,520 INFO L85 PathProgramCache]: Analyzing trace with hash -633857154, now seen corresponding path program 1 times [2021-11-23 02:26:14,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:26:14,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604511951] [2021-11-23 02:26:14,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:14,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:26:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:14,902 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 02:26:14,902 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:26:14,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604511951] [2021-11-23 02:26:14,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604511951] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:26:14,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:26:14,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:26:14,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129624235] [2021-11-23 02:26:14,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:26:14,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:26:14,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:26:14,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:26:14,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:26:14,905 INFO L87 Difference]: Start difference. First operand 16464 states and 26109 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 02:26:17,140 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 02:26:19,286 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:26:21,466 WARN L534 Checker$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 02:26:23,913 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:26:26,096 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:26,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:26:26,453 INFO L93 Difference]: Finished difference Result 16491 states and 26142 transitions. [2021-11-23 02:26:26,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:26:26,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 10 [2021-11-23 02:26:26,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:26:26,558 INFO L225 Difference]: With dead ends: 16491 [2021-11-23 02:26:26,558 INFO L226 Difference]: Without dead ends: 16488 [2021-11-23 02:26:26,575 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 02:26:26,576 INFO L933 BasicCegarLoop]: 7295 mSDtfsCounter, 6261 mSDsluCounter, 5047 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6263 SdHoareTripleChecker+Valid, 12174 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:26:26,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6263 Valid, 12174 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 404 Invalid, 3 Unknown, 0 Unchecked, 11.2s Time] [2021-11-23 02:26:26,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16488 states. [2021-11-23 02:26:29,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16488 to 16463. [2021-11-23 02:26:29,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16463 states, 11280 states have (on average 1.435017730496454) internal successors, (16187), 11315 states have internal predecessors, (16187), 4954 states have call successors, (4954), 231 states have call predecessors, (4954), 228 states have return successors, (4966), 4924 states have call predecessors, (4966), 4947 states have call successors, (4966) [2021-11-23 02:26:29,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16463 states to 16463 states and 26107 transitions. [2021-11-23 02:26:29,457 INFO L78 Accepts]: Start accepts. Automaton has 16463 states and 26107 transitions. Word has length 10 [2021-11-23 02:26:29,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:26:29,458 INFO L470 AbstractCegarLoop]: Abstraction has 16463 states and 26107 transitions. [2021-11-23 02:26:29,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 02:26:29,459 INFO L276 IsEmpty]: Start isEmpty. Operand 16463 states and 26107 transitions. [2021-11-23 02:26:29,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:26:29,461 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:29,462 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:26:29,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:26:29,462 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:29,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:29,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1822789090, now seen corresponding path program 1 times [2021-11-23 02:26:29,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:26:29,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737628224] [2021-11-23 02:26:29,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:29,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:26:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:29,954 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 02:26:29,954 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:26:29,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737628224] [2021-11-23 02:26:29,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737628224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:26:29,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:26:29,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:26:29,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75676597] [2021-11-23 02:26:29,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:26:29,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:26:29,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:26:29,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:26:29,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:26:29,957 INFO L87 Difference]: Start difference. First operand 16463 states and 26107 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 02:26:33,575 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:35,834 WARN L534 Checker$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 02:26:39,620 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 02:26:40,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:26:40,547 INFO L93 Difference]: Finished difference Result 49255 states and 78624 transitions. [2021-11-23 02:26:40,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:26:40,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 11 [2021-11-23 02:26:40,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:26:40,738 INFO L225 Difference]: With dead ends: 49255 [2021-11-23 02:26:40,739 INFO L226 Difference]: Without dead ends: 32787 [2021-11-23 02:26:40,903 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 02:26:40,905 INFO L933 BasicCegarLoop]: 7719 mSDtfsCounter, 6563 mSDsluCounter, 6636 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6563 SdHoareTripleChecker+Valid, 14122 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:26:40,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6563 Valid, 14122 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 480 Invalid, 2 Unknown, 0 Unchecked, 9.7s Time] [2021-11-23 02:26:40,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32787 states. [2021-11-23 02:26:46,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32787 to 32756. [2021-11-23 02:26:46,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32756 states, 22458 states have (on average 1.4355240894113457) internal successors, (32239), 22524 states have internal predecessors, (32239), 9858 states have call successors, (9858), 444 states have call predecessors, (9858), 439 states have return successors, (10182), 9803 states have call predecessors, (10182), 9849 states have call successors, (10182) [2021-11-23 02:26:47,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32756 states to 32756 states and 52279 transitions. [2021-11-23 02:26:47,107 INFO L78 Accepts]: Start accepts. Automaton has 32756 states and 52279 transitions. Word has length 11 [2021-11-23 02:26:47,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:26:47,107 INFO L470 AbstractCegarLoop]: Abstraction has 32756 states and 52279 transitions. [2021-11-23 02:26:47,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 02:26:47,108 INFO L276 IsEmpty]: Start isEmpty. Operand 32756 states and 52279 transitions. [2021-11-23 02:26:47,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 02:26:47,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:47,117 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 02:26:47,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:26:47,118 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:47,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:47,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1621656475, now seen corresponding path program 1 times [2021-11-23 02:26:47,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:26:47,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115956269] [2021-11-23 02:26:47,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:47,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:26:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:47,647 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 02:26:47,648 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:26:47,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115956269] [2021-11-23 02:26:47,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115956269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:26:47,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:26:47,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:26:47,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697299650] [2021-11-23 02:26:47,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:26:47,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:26:47,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:26:47,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:26:47,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:26:47,652 INFO L87 Difference]: Start difference. First operand 32756 states and 52279 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 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 02:26:51,831 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:53,846 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:56,122 WARN L534 Checker$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 02:26:58,258 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 02:27:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:01,489 INFO L93 Difference]: Finished difference Result 65897 states and 105421 transitions. [2021-11-23 02:27:01,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:27:01,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 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 02:27:01,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:01,833 INFO L225 Difference]: With dead ends: 65897 [2021-11-23 02:27:01,834 INFO L226 Difference]: Without dead ends: 33142 [2021-11-23 02:27:02,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:27:02,430 INFO L933 BasicCegarLoop]: 6372 mSDtfsCounter, 61 mSDsluCounter, 13161 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 31 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 19065 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:02,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 19065 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 768 Invalid, 3 Unknown, 0 Unchecked, 11.7s Time] [2021-11-23 02:27:02,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33142 states. [2021-11-23 02:27:07,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33142 to 33140. [2021-11-23 02:27:07,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33140 states, 22740 states have (on average 1.4330255057167987) internal successors, (32587), 22806 states have internal predecessors, (32587), 9948 states have call successors, (9948), 456 states have call predecessors, (9948), 451 states have return successors, (10272), 9893 states have call predecessors, (10272), 9939 states have call successors, (10272) [2021-11-23 02:27:07,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33140 states to 33140 states and 52807 transitions. [2021-11-23 02:27:07,272 INFO L78 Accepts]: Start accepts. Automaton has 33140 states and 52807 transitions. Word has length 53 [2021-11-23 02:27:07,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:07,273 INFO L470 AbstractCegarLoop]: Abstraction has 33140 states and 52807 transitions. [2021-11-23 02:27:07,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 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 02:27:07,273 INFO L276 IsEmpty]: Start isEmpty. Operand 33140 states and 52807 transitions. [2021-11-23 02:27:07,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 02:27:07,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:07,279 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 02:27:07,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:27:07,280 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:07,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:07,280 INFO L85 PathProgramCache]: Analyzing trace with hash 527686513, now seen corresponding path program 1 times [2021-11-23 02:27:07,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:07,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297326294] [2021-11-23 02:27:07,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:07,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:07,789 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 02:27:07,790 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:07,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297326294] [2021-11-23 02:27:07,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297326294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:07,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:07,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:27:07,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082408255] [2021-11-23 02:27:07,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:07,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:27:07,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:07,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:27:07,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:07,792 INFO L87 Difference]: Start difference. First operand 33140 states and 52807 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 02:27:10,950 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:12,466 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:14,648 WARN L534 Checker$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 02:27:16,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:16,253 INFO L93 Difference]: Finished difference Result 33247 states and 52935 transitions. [2021-11-23 02:27:16,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:27:16,255 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 02:27:16,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:16,531 INFO L225 Difference]: With dead ends: 33247 [2021-11-23 02:27:16,531 INFO L226 Difference]: Without dead ends: 33244 [2021-11-23 02:27:16,552 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 02:27:16,553 INFO L933 BasicCegarLoop]: 6388 mSDtfsCounter, 224 mSDsluCounter, 6402 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 12565 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:16,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 12565 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 474 Invalid, 1 Unknown, 0 Unchecked, 7.4s Time] [2021-11-23 02:27:16,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33244 states. [2021-11-23 02:27:20,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33244 to 33244. [2021-11-23 02:27:21,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33244 states, 22808 states have (on average 1.4325236759031919) internal successors, (32673), 22874 states have internal predecessors, (32673), 9966 states have call successors, (9966), 476 states have call predecessors, (9966), 469 states have return successors, (10290), 9909 states have call predecessors, (10290), 9957 states have call successors, (10290) [2021-11-23 02:27:21,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33244 states to 33244 states and 52929 transitions. [2021-11-23 02:27:21,230 INFO L78 Accepts]: Start accepts. Automaton has 33244 states and 52929 transitions. Word has length 54 [2021-11-23 02:27:21,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:21,230 INFO L470 AbstractCegarLoop]: Abstraction has 33244 states and 52929 transitions. [2021-11-23 02:27:21,231 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 02:27:21,231 INFO L276 IsEmpty]: Start isEmpty. Operand 33244 states and 52929 transitions. [2021-11-23 02:27:21,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 02:27:21,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:21,236 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 02:27:21,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:27:21,237 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:21,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:21,237 INFO L85 PathProgramCache]: Analyzing trace with hash -222032567, now seen corresponding path program 1 times [2021-11-23 02:27:21,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:21,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4287814] [2021-11-23 02:27:21,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:21,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:25,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:25,477 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 02:27:25,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:25,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4287814] [2021-11-23 02:27:25,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4287814] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:25,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:25,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:27:25,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985142185] [2021-11-23 02:27:25,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:25,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:27:25,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:25,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:27:25,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:25,481 INFO L87 Difference]: Start difference. First operand 33244 states and 52929 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 02:27:28,602 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:30,781 WARN L534 Checker$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 02:27:33,060 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:27:35,260 WARN L534 Checker$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 02:27:37,887 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 02:27:40,748 WARN L534 Checker$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 02:27:41,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:41,642 INFO L93 Difference]: Finished difference Result 66508 states and 112689 transitions. [2021-11-23 02:27:41,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:27:41,643 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 02:27:41,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:41,837 INFO L225 Difference]: With dead ends: 66508 [2021-11-23 02:27:41,837 INFO L226 Difference]: Without dead ends: 33265 [2021-11-23 02:27:42,493 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 02:27:42,496 INFO L933 BasicCegarLoop]: 6375 mSDtfsCounter, 0 mSDsluCounter, 6605 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12747 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:42,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12747 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 470 Invalid, 5 Unknown, 0 Unchecked, 14.8s Time] [2021-11-23 02:27:42,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33265 states. [2021-11-23 02:27:46,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33265 to 33265. [2021-11-23 02:27:46,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33265 states, 22829 states have (on average 1.4321258048972798) internal successors, (32694), 22895 states have internal predecessors, (32694), 9966 states have call successors, (9966), 476 states have call predecessors, (9966), 469 states have return successors, (10290), 9909 states have call predecessors, (10290), 9957 states have call successors, (10290) [2021-11-23 02:27:47,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33265 states to 33265 states and 52950 transitions. [2021-11-23 02:27:47,242 INFO L78 Accepts]: Start accepts. Automaton has 33265 states and 52950 transitions. Word has length 58 [2021-11-23 02:27:47,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:47,243 INFO L470 AbstractCegarLoop]: Abstraction has 33265 states and 52950 transitions. [2021-11-23 02:27:47,243 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 02:27:47,243 INFO L276 IsEmpty]: Start isEmpty. Operand 33265 states and 52950 transitions. [2021-11-23 02:27:47,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-23 02:27:47,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:47,247 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 02:27:47,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:27:47,247 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:47,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:47,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1792112437, now seen corresponding path program 1 times [2021-11-23 02:27:47,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:47,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200398327] [2021-11-23 02:27:47,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:47,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:49,992 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 02:27:49,993 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:49,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200398327] [2021-11-23 02:27:49,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200398327] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:49,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:49,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:27:49,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263643896] [2021-11-23 02:27:49,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:49,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:27:49,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:49,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:27:49,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:27:49,997 INFO L87 Difference]: Start difference. First operand 33265 states and 52950 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 02:27:54,244 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:56,515 WARN L534 Checker$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 02:28:00,856 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 02:28:01,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:01,511 INFO L93 Difference]: Finished difference Result 66550 states and 112731 transitions. [2021-11-23 02:28:01,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:28:01,512 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 02:28:01,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:01,753 INFO L225 Difference]: With dead ends: 66550 [2021-11-23 02:28:01,754 INFO L226 Difference]: Without dead ends: 33286 [2021-11-23 02:28:02,466 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 02:28:02,467 INFO L933 BasicCegarLoop]: 6373 mSDtfsCounter, 10 mSDsluCounter, 13200 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 19108 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:02,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 19108 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 708 Invalid, 3 Unknown, 0 Unchecked, 10.2s Time] [2021-11-23 02:28:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33286 states. [2021-11-23 02:28:07,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33286 to 33286. [2021-11-23 02:28:07,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33286 states, 22850 states have (on average 1.4317286652078776) internal successors, (32715), 22916 states have internal predecessors, (32715), 9966 states have call successors, (9966), 476 states have call predecessors, (9966), 469 states have return successors, (10290), 9909 states have call predecessors, (10290), 9957 states have call successors, (10290) [2021-11-23 02:28:07,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33286 states to 33286 states and 52971 transitions. [2021-11-23 02:28:07,259 INFO L78 Accepts]: Start accepts. Automaton has 33286 states and 52971 transitions. Word has length 59 [2021-11-23 02:28:07,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:07,260 INFO L470 AbstractCegarLoop]: Abstraction has 33286 states and 52971 transitions. [2021-11-23 02:28:07,260 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 02:28:07,260 INFO L276 IsEmpty]: Start isEmpty. Operand 33286 states and 52971 transitions. [2021-11-23 02:28:07,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 02:28:07,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:07,265 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 02:28:07,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:28:07,266 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:07,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:07,266 INFO L85 PathProgramCache]: Analyzing trace with hash 972261690, now seen corresponding path program 1 times [2021-11-23 02:28:07,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:07,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063796257] [2021-11-23 02:28:07,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:07,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms