./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW --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 be936ec9376452d086f72aa92ac4fe7deb233a068e40e0ed8f478fbc228d19b6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 13:48:05,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:48:05,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:48:05,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:48:05,712 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:48:05,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:48:05,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:48:05,721 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:48:05,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:48:05,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:48:05,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:48:05,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:48:05,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:48:05,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:48:05,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:48:05,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:48:05,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:48:05,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:48:05,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:48:05,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:48:05,748 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:48:05,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:48:05,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:48:05,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:48:05,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:48:05,755 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:48:05,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:48:05,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:48:05,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:48:05,757 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:48:05,758 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:48:05,758 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:48:05,759 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:48:05,760 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:48:05,760 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:48:05,761 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:48:05,761 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:48:05,762 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:48:05,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:48:05,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:48:05,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:48:05,764 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 13:48:05,786 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:48:05,787 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:48:05,787 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:48:05,787 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:48:05,788 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:48:05,788 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:48:05,788 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:48:05,789 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:48:05,789 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:48:05,789 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:48:05,789 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:48:05,789 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:48:05,789 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:48:05,790 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:48:05,790 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:48:05,790 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:48:05,790 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:48:05,790 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:48:05,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:48:05,791 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:48:05,791 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:48:05,792 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 13:48:05,792 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:48:05,792 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 13:48:05,792 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 13:48:05,792 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:48:05,793 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 13:48:05,793 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:48:05,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:48:05,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:48:05,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:48:05,794 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:48:05,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:48:05,794 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 13:48:05,794 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:48:05,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:48:05,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 13:48:05,795 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:48:05,795 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be936ec9376452d086f72aa92ac4fe7deb233a068e40e0ed8f478fbc228d19b6 [2022-11-23 13:48:06,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:48:06,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:48:06,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:48:06,156 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:48:06,157 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:48:06,158 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2022-11-23 13:48:09,217 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:48:09,837 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:48:09,838 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2022-11-23 13:48:09,874 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/data/0e8160caf/8a9716f18a9c4cb6bb9d2a2cac0386c8/FLAG9584c4b93 [2022-11-23 13:48:09,893 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/data/0e8160caf/8a9716f18a9c4cb6bb9d2a2cac0386c8 [2022-11-23 13:48:09,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:48:09,899 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:48:09,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:48:09,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:48:09,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:48:09,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:48:09" (1/1) ... [2022-11-23 13:48:09,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a3b3815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:09, skipping insertion in model container [2022-11-23 13:48:09,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:48:09" (1/1) ... [2022-11-23 13:48:09,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:48:10,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:48:10,852 WARN L237 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_b61718ed-d592-471c-910a-e9748721c875/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i[164250,164263] [2022-11-23 13:48:11,370 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:48:11,405 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:48:11,586 WARN L237 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_b61718ed-d592-471c-910a-e9748721c875/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i[164250,164263] [2022-11-23 13:48:11,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:48:11,826 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:48:11,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:11 WrapperNode [2022-11-23 13:48:11,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:48:11,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:48:11,828 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:48:11,828 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:48:11,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:11" (1/1) ... [2022-11-23 13:48:11,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:11" (1/1) ... [2022-11-23 13:48:11,991 INFO L138 Inliner]: procedures = 169, calls = 735, calls flagged for inlining = 77, calls inlined = 77, statements flattened = 1996 [2022-11-23 13:48:11,992 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:48:11,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:48:11,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:48:11,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:48:12,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:11" (1/1) ... [2022-11-23 13:48:12,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:11" (1/1) ... [2022-11-23 13:48:12,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:11" (1/1) ... [2022-11-23 13:48:12,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:11" (1/1) ... [2022-11-23 13:48:12,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:11" (1/1) ... [2022-11-23 13:48:12,142 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:11" (1/1) ... [2022-11-23 13:48:12,169 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:11" (1/1) ... [2022-11-23 13:48:12,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:11" (1/1) ... [2022-11-23 13:48:12,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:48:12,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:48:12,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:48:12,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:48:12,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:11" (1/1) ... [2022-11-23 13:48:12,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:48:12,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:12,260 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:48:12,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:48:12,306 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-23 13:48:12,307 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-23 13:48:12,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 13:48:12,307 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_18 [2022-11-23 13:48:12,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_18 [2022-11-23 13:48:12,307 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_4 [2022-11-23 13:48:12,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_4 [2022-11-23 13:48:12,308 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_3 [2022-11-23 13:48:12,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_3 [2022-11-23 13:48:12,308 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_2 [2022-11-23 13:48:12,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_2 [2022-11-23 13:48:12,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 13:48:12,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 13:48:12,309 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 13:48:12,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 13:48:12,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 13:48:12,309 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-23 13:48:12,309 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-23 13:48:12,310 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_read_bulk_callback [2022-11-23 13:48:12,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_read_bulk_callback [2022-11-23 13:48:12,310 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-11-23 13:48:12,310 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-11-23 13:48:12,310 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2022-11-23 13:48:12,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2022-11-23 13:48:12,311 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_control_cmd [2022-11-23 13:48:12,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_control_cmd [2022-11-23 13:48:12,312 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-23 13:48:12,312 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-23 13:48:12,313 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-23 13:48:12,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-23 13:48:12,313 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 13:48:12,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 13:48:12,313 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2022-11-23 13:48:12,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2022-11-23 13:48:12,314 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-23 13:48:12,314 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-23 13:48:12,314 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2022-11-23 13:48:12,314 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2022-11-23 13:48:12,315 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 13:48:12,315 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 13:48:12,315 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2022-11-23 13:48:12,315 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2022-11-23 13:48:12,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 13:48:12,315 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-23 13:48:12,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-23 13:48:12,316 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 13:48:12,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 13:48:12,316 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 13:48:12,316 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 13:48:12,317 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-23 13:48:12,317 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-23 13:48:12,317 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_command_msg [2022-11-23 13:48:12,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_command_msg [2022-11-23 13:48:12,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 13:48:12,319 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2022-11-23 13:48:12,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2022-11-23 13:48:12,319 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2022-11-23 13:48:12,319 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2022-11-23 13:48:12,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:48:12,320 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-23 13:48:12,320 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-23 13:48:12,321 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-23 13:48:12,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-23 13:48:12,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 13:48:12,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 13:48:12,321 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_write_mode [2022-11-23 13:48:12,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_write_mode [2022-11-23 13:48:12,322 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 13:48:12,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 13:48:12,322 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-11-23 13:48:12,322 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-11-23 13:48:12,323 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2022-11-23 13:48:12,323 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2022-11-23 13:48:12,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 13:48:12,324 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_disconnect [2022-11-23 13:48:12,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_disconnect [2022-11-23 13:48:12,324 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-11-23 13:48:12,324 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-11-23 13:48:12,325 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2022-11-23 13:48:12,325 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2022-11-23 13:48:12,326 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_read_interrupt_callback [2022-11-23 13:48:12,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_read_interrupt_callback [2022-11-23 13:48:12,326 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2022-11-23 13:48:12,326 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2022-11-23 13:48:12,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 13:48:12,326 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2022-11-23 13:48:12,327 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2022-11-23 13:48:12,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 13:48:12,327 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_rx_err [2022-11-23 13:48:12,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_rx_err [2022-11-23 13:48:12,327 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-11-23 13:48:12,328 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-11-23 13:48:12,328 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2022-11-23 13:48:12,328 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2022-11-23 13:48:12,328 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-23 13:48:12,329 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-23 13:48:12,329 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2022-11-23 13:48:12,329 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2022-11-23 13:48:12,329 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-23 13:48:12,330 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-23 13:48:12,330 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2022-11-23 13:48:12,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2022-11-23 13:48:12,330 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2022-11-23 13:48:12,330 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2022-11-23 13:48:12,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 13:48:12,331 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2022-11-23 13:48:12,331 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2022-11-23 13:48:12,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-23 13:48:12,331 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-23 13:48:12,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-23 13:48:12,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:48:12,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:48:12,944 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:48:12,949 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:48:13,199 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 13:48:13,871 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2022-11-23 13:48:16,246 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:48:16,881 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:48:16,881 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 13:48:16,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:48:16 BoogieIcfgContainer [2022-11-23 13:48:16,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:48:16,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:48:16,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:48:16,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:48:16,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:48:09" (1/3) ... [2022-11-23 13:48:16,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19fa6c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:48:16, skipping insertion in model container [2022-11-23 13:48:16,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:48:11" (2/3) ... [2022-11-23 13:48:16,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19fa6c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:48:16, skipping insertion in model container [2022-11-23 13:48:16,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:48:16" (3/3) ... [2022-11-23 13:48:16,894 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2022-11-23 13:48:16,915 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:48:16,915 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 13:48:16,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:48:16,985 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1ec19ca8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:48:16,986 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 13:48:16,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 484 states, 301 states have (on average 1.372093023255814) internal successors, (413), 325 states have internal predecessors, (413), 135 states have call successors, (135), 48 states have call predecessors, (135), 46 states have return successors, (129), 124 states have call predecessors, (129), 129 states have call successors, (129) [2022-11-23 13:48:17,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 13:48:17,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:17,003 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:17,004 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:17,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:17,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1992315457, now seen corresponding path program 1 times [2022-11-23 13:48:17,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:17,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586344869] [2022-11-23 13:48:17,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:17,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 13:48:17,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:17,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586344869] [2022-11-23 13:48:17,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586344869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:17,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:17,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:48:17,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839296307] [2022-11-23 13:48:17,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:17,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:17,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:17,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:17,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:48:17,698 INFO L87 Difference]: Start difference. First operand has 484 states, 301 states have (on average 1.372093023255814) internal successors, (413), 325 states have internal predecessors, (413), 135 states have call successors, (135), 48 states have call predecessors, (135), 46 states have return successors, (129), 124 states have call predecessors, (129), 129 states have call successors, (129) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 13:48:21,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:48:23,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:23,507 INFO L93 Difference]: Finished difference Result 1418 states and 1985 transitions. [2022-11-23 13:48:23,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:48:23,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-11-23 13:48:23,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:23,528 INFO L225 Difference]: With dead ends: 1418 [2022-11-23 13:48:23,528 INFO L226 Difference]: Without dead ends: 919 [2022-11-23 13:48:23,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:48:23,538 INFO L413 NwaCegarLoop]: 694 mSDtfsCounter, 629 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:23,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 1257 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 204 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2022-11-23 13:48:23,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-11-23 13:48:23,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 919. [2022-11-23 13:48:23,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 580 states have (on average 1.3413793103448275) internal successors, (778), 608 states have internal predecessors, (778), 248 states have call successors, (248), 91 states have call predecessors, (248), 90 states have return successors, (246), 233 states have call predecessors, (246), 243 states have call successors, (246) [2022-11-23 13:48:23,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1272 transitions. [2022-11-23 13:48:23,659 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1272 transitions. Word has length 23 [2022-11-23 13:48:23,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:23,659 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1272 transitions. [2022-11-23 13:48:23,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 13:48:23,660 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1272 transitions. [2022-11-23 13:48:23,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 13:48:23,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:23,663 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:23,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 13:48:23,664 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:23,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:23,664 INFO L85 PathProgramCache]: Analyzing trace with hash -2091634095, now seen corresponding path program 1 times [2022-11-23 13:48:23,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:23,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422434742] [2022-11-23 13:48:23,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:23,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 13:48:24,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:24,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422434742] [2022-11-23 13:48:24,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422434742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:24,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:24,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:48:24,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425267558] [2022-11-23 13:48:24,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:24,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:24,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:24,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:24,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:48:24,253 INFO L87 Difference]: Start difference. First operand 919 states and 1272 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 13:48:27,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:48:30,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:30,236 INFO L93 Difference]: Finished difference Result 1621 states and 2230 transitions. [2022-11-23 13:48:30,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:48:30,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2022-11-23 13:48:30,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:30,249 INFO L225 Difference]: With dead ends: 1621 [2022-11-23 13:48:30,250 INFO L226 Difference]: Without dead ends: 1618 [2022-11-23 13:48:30,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:48:30,253 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 471 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:30,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 1202 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 201 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2022-11-23 13:48:30,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2022-11-23 13:48:30,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1606. [2022-11-23 13:48:30,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1021 states have (on average 1.3486777668952008) internal successors, (1377), 1075 states have internal predecessors, (1377), 416 states have call successors, (416), 171 states have call predecessors, (416), 168 states have return successors, (420), 385 states have call predecessors, (420), 411 states have call successors, (420) [2022-11-23 13:48:30,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2213 transitions. [2022-11-23 13:48:30,356 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2213 transitions. Word has length 32 [2022-11-23 13:48:30,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:30,357 INFO L495 AbstractCegarLoop]: Abstraction has 1606 states and 2213 transitions. [2022-11-23 13:48:30,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 13:48:30,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2213 transitions. [2022-11-23 13:48:30,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 13:48:30,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:30,360 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:30,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 13:48:30,361 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:30,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:30,361 INFO L85 PathProgramCache]: Analyzing trace with hash -416460031, now seen corresponding path program 1 times [2022-11-23 13:48:30,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:30,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485428640] [2022-11-23 13:48:30,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:30,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 13:48:30,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:30,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485428640] [2022-11-23 13:48:30,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485428640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:30,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:30,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:48:30,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116575287] [2022-11-23 13:48:30,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:30,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:30,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:30,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:30,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:48:30,723 INFO L87 Difference]: Start difference. First operand 1606 states and 2213 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 13:48:33,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:48:34,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:34,578 INFO L93 Difference]: Finished difference Result 1612 states and 2219 transitions. [2022-11-23 13:48:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:48:34,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2022-11-23 13:48:34,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:34,589 INFO L225 Difference]: With dead ends: 1612 [2022-11-23 13:48:34,590 INFO L226 Difference]: Without dead ends: 1609 [2022-11-23 13:48:34,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:48:34,593 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 629 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:34,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 556 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-11-23 13:48:34,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2022-11-23 13:48:34,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1609. [2022-11-23 13:48:34,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1023 states have (on average 1.3470185728250244) internal successors, (1378), 1077 states have internal predecessors, (1378), 415 states have call successors, (415), 172 states have call predecessors, (415), 170 states have return successors, (423), 385 states have call predecessors, (423), 411 states have call successors, (423) [2022-11-23 13:48:34,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 2216 transitions. [2022-11-23 13:48:34,719 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 2216 transitions. Word has length 33 [2022-11-23 13:48:34,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:34,720 INFO L495 AbstractCegarLoop]: Abstraction has 1609 states and 2216 transitions. [2022-11-23 13:48:34,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 13:48:34,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 2216 transitions. [2022-11-23 13:48:34,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 13:48:34,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:34,722 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:34,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 13:48:34,723 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:34,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:34,723 INFO L85 PathProgramCache]: Analyzing trace with hash -25666732, now seen corresponding path program 1 times [2022-11-23 13:48:34,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:34,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342365163] [2022-11-23 13:48:34,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:34,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 13:48:34,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:34,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342365163] [2022-11-23 13:48:34,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342365163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:34,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:34,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:48:34,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704764748] [2022-11-23 13:48:34,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:34,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:34,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:34,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:34,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:48:34,881 INFO L87 Difference]: Start difference. First operand 1609 states and 2216 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 13:48:37,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:48:38,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:38,905 INFO L93 Difference]: Finished difference Result 1611 states and 2217 transitions. [2022-11-23 13:48:38,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:48:38,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2022-11-23 13:48:38,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:38,915 INFO L225 Difference]: With dead ends: 1611 [2022-11-23 13:48:38,916 INFO L226 Difference]: Without dead ends: 1608 [2022-11-23 13:48:38,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:48:38,918 INFO L413 NwaCegarLoop]: 550 mSDtfsCounter, 626 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:38,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [629 Valid, 554 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-11-23 13:48:38,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2022-11-23 13:48:39,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1608. [2022-11-23 13:48:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1023 states have (on average 1.346041055718475) internal successors, (1377), 1076 states have internal predecessors, (1377), 414 states have call successors, (414), 172 states have call predecessors, (414), 170 states have return successors, (423), 385 states have call predecessors, (423), 411 states have call successors, (423) [2022-11-23 13:48:39,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 2214 transitions. [2022-11-23 13:48:39,037 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 2214 transitions. Word has length 34 [2022-11-23 13:48:39,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:39,037 INFO L495 AbstractCegarLoop]: Abstraction has 1608 states and 2214 transitions. [2022-11-23 13:48:39,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 13:48:39,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 2214 transitions. [2022-11-23 13:48:39,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 13:48:39,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:39,039 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:39,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 13:48:39,040 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:39,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:39,040 INFO L85 PathProgramCache]: Analyzing trace with hash -795971484, now seen corresponding path program 1 times [2022-11-23 13:48:39,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:39,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328379378] [2022-11-23 13:48:39,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:39,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:39,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 13:48:39,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:39,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328379378] [2022-11-23 13:48:39,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328379378] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:39,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:39,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:48:39,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946791625] [2022-11-23 13:48:39,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:39,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:39,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:39,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:39,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:48:39,173 INFO L87 Difference]: Start difference. First operand 1608 states and 2214 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 13:48:42,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:48:43,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:48:43,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:43,641 INFO L93 Difference]: Finished difference Result 1610 states and 2215 transitions. [2022-11-23 13:48:43,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:48:43,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2022-11-23 13:48:43,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:43,651 INFO L225 Difference]: With dead ends: 1610 [2022-11-23 13:48:43,651 INFO L226 Difference]: Without dead ends: 1607 [2022-11-23 13:48:43,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:48:43,653 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 623 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:43,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 552 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-11-23 13:48:43,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2022-11-23 13:48:43,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1607. [2022-11-23 13:48:43,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1023 states have (on average 1.3450635386119256) internal successors, (1376), 1075 states have internal predecessors, (1376), 413 states have call successors, (413), 172 states have call predecessors, (413), 170 states have return successors, (423), 385 states have call predecessors, (423), 411 states have call successors, (423) [2022-11-23 13:48:43,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 2212 transitions. [2022-11-23 13:48:43,776 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 2212 transitions. Word has length 35 [2022-11-23 13:48:43,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:43,776 INFO L495 AbstractCegarLoop]: Abstraction has 1607 states and 2212 transitions. [2022-11-23 13:48:43,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 13:48:43,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 2212 transitions. [2022-11-23 13:48:43,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 13:48:43,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:43,779 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:43,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 13:48:43,779 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:43,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:43,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1094389847, now seen corresponding path program 1 times [2022-11-23 13:48:43,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:43,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043348424] [2022-11-23 13:48:43,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:43,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 13:48:43,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:43,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043348424] [2022-11-23 13:48:43,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043348424] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:43,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:43,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:48:43,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015400824] [2022-11-23 13:48:43,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:43,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:43,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:43,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:43,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:48:43,915 INFO L87 Difference]: Start difference. First operand 1607 states and 2212 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 13:48:47,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:48:49,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:48:50,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:50,797 INFO L93 Difference]: Finished difference Result 2504 states and 3450 transitions. [2022-11-23 13:48:50,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:48:50,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-11-23 13:48:50,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:50,813 INFO L225 Difference]: With dead ends: 2504 [2022-11-23 13:48:50,814 INFO L226 Difference]: Without dead ends: 2495 [2022-11-23 13:48:50,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:48:50,817 INFO L413 NwaCegarLoop]: 668 mSDtfsCounter, 608 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:50,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 1211 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-11-23 13:48:50,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2022-11-23 13:48:51,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2490. [2022-11-23 13:48:51,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 1580 states have (on average 1.3417721518987342) internal successors, (2120), 1658 states have internal predecessors, (2120), 649 states have call successors, (649), 262 states have call predecessors, (649), 260 states have return successors, (665), 609 states have call predecessors, (665), 647 states have call successors, (665) [2022-11-23 13:48:51,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 3434 transitions. [2022-11-23 13:48:51,051 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 3434 transitions. Word has length 36 [2022-11-23 13:48:51,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:51,051 INFO L495 AbstractCegarLoop]: Abstraction has 2490 states and 3434 transitions. [2022-11-23 13:48:51,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 13:48:51,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 3434 transitions. [2022-11-23 13:48:51,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-23 13:48:51,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:51,056 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:51,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 13:48:51,057 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:51,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:51,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1950397490, now seen corresponding path program 1 times [2022-11-23 13:48:51,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:51,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029446261] [2022-11-23 13:48:51,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:51,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:51,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 13:48:51,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:51,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029446261] [2022-11-23 13:48:51,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029446261] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:51,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:51,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:48:51,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955502790] [2022-11-23 13:48:51,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:51,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:51,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:51,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:51,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:48:51,198 INFO L87 Difference]: Start difference. First operand 2490 states and 3434 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:48:55,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:48:56,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:48:58,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:48:58,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:58,535 INFO L93 Difference]: Finished difference Result 5683 states and 7765 transitions. [2022-11-23 13:48:58,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:48:58,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 70 [2022-11-23 13:48:58,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:58,553 INFO L225 Difference]: With dead ends: 5683 [2022-11-23 13:48:58,554 INFO L226 Difference]: Without dead ends: 3198 [2022-11-23 13:48:58,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:48:58,563 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 191 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:58,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 1130 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 7.1s Time] [2022-11-23 13:48:58,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3198 states. [2022-11-23 13:48:58,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3198 to 3178. [2022-11-23 13:48:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3178 states, 2023 states have (on average 1.3306969846762233) internal successors, (2692), 2105 states have internal predecessors, (2692), 802 states have call successors, (802), 356 states have call predecessors, (802), 352 states have return successors, (818), 756 states have call predecessors, (818), 800 states have call successors, (818) [2022-11-23 13:48:58,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 4312 transitions. [2022-11-23 13:48:58,803 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 4312 transitions. Word has length 70 [2022-11-23 13:48:58,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:58,804 INFO L495 AbstractCegarLoop]: Abstraction has 3178 states and 4312 transitions. [2022-11-23 13:48:58,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-23 13:48:58,804 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 4312 transitions. [2022-11-23 13:48:58,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 13:48:58,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:58,808 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:58,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 13:48:58,809 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:58,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:58,809 INFO L85 PathProgramCache]: Analyzing trace with hash -645718642, now seen corresponding path program 1 times [2022-11-23 13:48:58,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:58,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032053131] [2022-11-23 13:48:58,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:58,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 13:48:59,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:59,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032053131] [2022-11-23 13:48:59,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032053131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:48:59,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:48:59,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:48:59,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868973703] [2022-11-23 13:48:59,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:48:59,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:48:59,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:48:59,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:48:59,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:48:59,093 INFO L87 Difference]: Start difference. First operand 3178 states and 4312 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 13:49:03,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:49:05,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:49:05,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:05,406 INFO L93 Difference]: Finished difference Result 7075 states and 9571 transitions. [2022-11-23 13:49:05,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:49:05,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 82 [2022-11-23 13:49:05,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:05,426 INFO L225 Difference]: With dead ends: 7075 [2022-11-23 13:49:05,426 INFO L226 Difference]: Without dead ends: 3908 [2022-11-23 13:49:05,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:49:05,438 INFO L413 NwaCegarLoop]: 684 mSDtfsCounter, 172 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1221 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:05,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 1221 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 230 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2022-11-23 13:49:05,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3908 states. [2022-11-23 13:49:05,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3908 to 3886. [2022-11-23 13:49:05,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3886 states, 2498 states have (on average 1.3270616493194556) internal successors, (3315), 2586 states have internal predecessors, (3315), 948 states have call successors, (948), 445 states have call predecessors, (948), 439 states have return successors, (964), 894 states have call predecessors, (964), 946 states have call successors, (964) [2022-11-23 13:49:05,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3886 states to 3886 states and 5227 transitions. [2022-11-23 13:49:05,782 INFO L78 Accepts]: Start accepts. Automaton has 3886 states and 5227 transitions. Word has length 82 [2022-11-23 13:49:05,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:05,783 INFO L495 AbstractCegarLoop]: Abstraction has 3886 states and 5227 transitions. [2022-11-23 13:49:05,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 13:49:05,784 INFO L276 IsEmpty]: Start isEmpty. Operand 3886 states and 5227 transitions. [2022-11-23 13:49:05,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-23 13:49:05,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:05,788 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:49:05,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 13:49:05,788 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:05,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:05,789 INFO L85 PathProgramCache]: Analyzing trace with hash -272602039, now seen corresponding path program 1 times [2022-11-23 13:49:05,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:05,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999129573] [2022-11-23 13:49:05,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:05,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 13:49:05,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:05,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999129573] [2022-11-23 13:49:05,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999129573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:49:05,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:49:05,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:49:05,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488628772] [2022-11-23 13:49:05,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:49:05,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:49:05,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:05,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:49:05,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:49:05,977 INFO L87 Difference]: Start difference. First operand 3886 states and 5227 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-23 13:49:07,058 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:49:10,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:49:12,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:49:14,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:49:14,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:14,309 INFO L93 Difference]: Finished difference Result 10169 states and 13767 transitions. [2022-11-23 13:49:14,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:49:14,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 87 [2022-11-23 13:49:14,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:14,337 INFO L225 Difference]: With dead ends: 10169 [2022-11-23 13:49:14,338 INFO L226 Difference]: Without dead ends: 6294 [2022-11-23 13:49:14,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:49:14,351 INFO L413 NwaCegarLoop]: 835 mSDtfsCounter, 545 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1372 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:14,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 1372 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 243 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2022-11-23 13:49:14,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6294 states. [2022-11-23 13:49:14,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6294 to 6273. [2022-11-23 13:49:14,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6273 states, 4090 states have (on average 1.3400977995110024) internal successors, (5481), 4250 states have internal predecessors, (5481), 1500 states have call successors, (1500), 690 states have call predecessors, (1500), 682 states have return successors, (1534), 1412 states have call predecessors, (1534), 1498 states have call successors, (1534) [2022-11-23 13:49:14,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6273 states to 6273 states and 8515 transitions. [2022-11-23 13:49:14,839 INFO L78 Accepts]: Start accepts. Automaton has 6273 states and 8515 transitions. Word has length 87 [2022-11-23 13:49:14,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:14,839 INFO L495 AbstractCegarLoop]: Abstraction has 6273 states and 8515 transitions. [2022-11-23 13:49:14,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-23 13:49:14,840 INFO L276 IsEmpty]: Start isEmpty. Operand 6273 states and 8515 transitions. [2022-11-23 13:49:14,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-23 13:49:14,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:14,845 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:49:14,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 13:49:14,846 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:14,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:14,846 INFO L85 PathProgramCache]: Analyzing trace with hash 978163387, now seen corresponding path program 1 times [2022-11-23 13:49:14,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:14,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049460695] [2022-11-23 13:49:14,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:14,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 13:49:15,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:15,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049460695] [2022-11-23 13:49:15,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049460695] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:49:15,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959632007] [2022-11-23 13:49:15,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:15,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:49:15,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:49:15,587 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:49:15,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 13:49:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:16,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:49:16,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:49:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-23 13:49:16,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:49:16,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959632007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:49:16,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:49:16,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-11-23 13:49:16,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025543026] [2022-11-23 13:49:16,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:49:16,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:49:16,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:16,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:49:16,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-23 13:49:16,325 INFO L87 Difference]: Start difference. First operand 6273 states and 8515 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-23 13:49:21,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:49:24,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:49:24,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:24,759 INFO L93 Difference]: Finished difference Result 13115 states and 18270 transitions. [2022-11-23 13:49:24,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:49:24,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 91 [2022-11-23 13:49:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:24,799 INFO L225 Difference]: With dead ends: 13115 [2022-11-23 13:49:24,799 INFO L226 Difference]: Without dead ends: 8551 [2022-11-23 13:49:24,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-23 13:49:24,813 INFO L413 NwaCegarLoop]: 766 mSDtfsCounter, 302 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 86 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 1951 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:24,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 1951 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 319 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2022-11-23 13:49:24,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8551 states. [2022-11-23 13:49:25,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8551 to 6297. [2022-11-23 13:49:25,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6297 states, 4114 states have (on average 1.338113757899854) internal successors, (5505), 4274 states have internal predecessors, (5505), 1500 states have call successors, (1500), 690 states have call predecessors, (1500), 682 states have return successors, (1534), 1412 states have call predecessors, (1534), 1498 states have call successors, (1534) [2022-11-23 13:49:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6297 states to 6297 states and 8539 transitions. [2022-11-23 13:49:25,381 INFO L78 Accepts]: Start accepts. Automaton has 6297 states and 8539 transitions. Word has length 91 [2022-11-23 13:49:25,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:25,382 INFO L495 AbstractCegarLoop]: Abstraction has 6297 states and 8539 transitions. [2022-11-23 13:49:25,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-23 13:49:25,383 INFO L276 IsEmpty]: Start isEmpty. Operand 6297 states and 8539 transitions. [2022-11-23 13:49:25,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-23 13:49:25,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:25,388 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:49:25,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 13:49:25,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:49:25,598 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:25,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:25,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1200687291, now seen corresponding path program 1 times [2022-11-23 13:49:25,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:25,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812399587] [2022-11-23 13:49:25,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:25,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 13:49:25,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:25,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812399587] [2022-11-23 13:49:25,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812399587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:49:25,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:49:25,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:49:25,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510771256] [2022-11-23 13:49:25,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:49:25,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:49:25,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:49:25,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:49:25,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:49:25,863 INFO L87 Difference]: Start difference. First operand 6297 states and 8539 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 13:49:30,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:49:31,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:49:32,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:49:32,390 INFO L93 Difference]: Finished difference Result 10909 states and 14814 transitions. [2022-11-23 13:49:32,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:49:32,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 99 [2022-11-23 13:49:32,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:49:32,419 INFO L225 Difference]: With dead ends: 10909 [2022-11-23 13:49:32,419 INFO L226 Difference]: Without dead ends: 6315 [2022-11-23 13:49:32,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:49:32,433 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 0 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1095 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:49:32,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1095 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 196 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2022-11-23 13:49:32,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6315 states. [2022-11-23 13:49:32,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6315 to 6315. [2022-11-23 13:49:32,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6315 states, 4132 states have (on average 1.3366408518877058) internal successors, (5523), 4292 states have internal predecessors, (5523), 1500 states have call successors, (1500), 690 states have call predecessors, (1500), 682 states have return successors, (1534), 1412 states have call predecessors, (1534), 1498 states have call successors, (1534) [2022-11-23 13:49:33,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6315 states to 6315 states and 8557 transitions. [2022-11-23 13:49:33,002 INFO L78 Accepts]: Start accepts. Automaton has 6315 states and 8557 transitions. Word has length 99 [2022-11-23 13:49:33,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:49:33,004 INFO L495 AbstractCegarLoop]: Abstraction has 6315 states and 8557 transitions. [2022-11-23 13:49:33,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-23 13:49:33,004 INFO L276 IsEmpty]: Start isEmpty. Operand 6315 states and 8557 transitions. [2022-11-23 13:49:33,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-23 13:49:33,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:49:33,010 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:49:33,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 13:49:33,010 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:49:33,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:49:33,011 INFO L85 PathProgramCache]: Analyzing trace with hash -665223782, now seen corresponding path program 1 times [2022-11-23 13:49:33,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:49:33,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660510741] [2022-11-23 13:49:33,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:33,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:49:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 13:49:33,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:49:33,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660510741] [2022-11-23 13:49:33,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660510741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:49:33,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333870278] [2022-11-23 13:49:33,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:49:33,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:49:33,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:49:33,298 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:49:33,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 13:49:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:49:34,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 1783 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:49:34,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:49:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 13:49:34,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:49:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 13:49:34,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333870278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:49:34,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [369938200] [2022-11-23 13:49:34,209 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-23 13:49:34,209 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:49:34,213 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:49:34,218 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:49:34,219 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:49:36,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:36,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:36,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:36,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:36,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:36,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:36,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:36,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:36,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:36,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:36,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:36,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 66 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 98 [2022-11-23 13:49:36,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 13:49:36,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 175 [2022-11-23 13:49:37,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:37,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-23 13:49:38,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 55 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 91 [2022-11-23 13:49:39,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 509 treesize of output 401 [2022-11-23 13:49:39,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:39,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 24 select indices, 24 select index equivalence classes, 276 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 73 [2022-11-23 13:49:39,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2022-11-23 13:49:41,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 509 treesize of output 401 [2022-11-23 13:49:41,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:41,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 24 select indices, 24 select index equivalence classes, 276 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 73 [2022-11-23 13:49:41,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2022-11-23 13:50:16,529 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 221 for LOIs [2022-11-23 13:50:16,714 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 649 for LOIs [2022-11-23 13:50:17,123 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:50:26,196 WARN L233 SmtUtils]: Spent 8.64s on a formula simplification that was a NOOP. DAG size: 1010 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:50:43,657 WARN L233 SmtUtils]: Spent 6.83s on a formula simplification. DAG size of input: 655 DAG size of output: 652 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:51:10,484 WARN L233 SmtUtils]: Spent 26.52s on a formula simplification. DAG size of input: 928 DAG size of output: 754 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:51:35,765 WARN L233 SmtUtils]: Spent 24.97s on a formula simplification. DAG size of input: 808 DAG size of output: 765 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:52:06,037 WARN L233 SmtUtils]: Spent 10.31s on a formula simplification. DAG size of input: 784 DAG size of output: 745 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:52:30,936 WARN L233 SmtUtils]: Spent 24.38s on a formula simplification. DAG size of input: 798 DAG size of output: 755 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:52:42,330 WARN L233 SmtUtils]: Spent 10.86s on a formula simplification. DAG size of input: 801 DAG size of output: 758 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:52:53,518 WARN L233 SmtUtils]: Spent 10.64s on a formula simplification. DAG size of input: 791 DAG size of output: 748 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:53:05,551 WARN L233 SmtUtils]: Spent 11.42s on a formula simplification. DAG size of input: 821 DAG size of output: 778 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:53:29,711 WARN L233 SmtUtils]: Spent 12.07s on a formula simplification. DAG size of input: 845 DAG size of output: 786 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:53:42,644 WARN L233 SmtUtils]: Spent 12.21s on a formula simplification. DAG size of input: 849 DAG size of output: 790 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:53:46,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [369938200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:53:46,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:53:46,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [4, 4, 4] total 38 [2022-11-23 13:53:46,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073199482] [2022-11-23 13:53:46,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:53:46,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-23 13:53:46,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:53:46,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-23 13:53:46,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1239, Unknown=0, NotChecked=0, Total=1406 [2022-11-23 13:53:46,244 INFO L87 Difference]: Start difference. First operand 6315 states and 8557 transitions. Second operand has 33 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-23 13:54:09,379 WARN L233 SmtUtils]: Spent 18.73s on a formula simplification. DAG size of input: 1043 DAG size of output: 1019 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:54:28,854 WARN L233 SmtUtils]: Spent 18.95s on a formula simplification. DAG size of input: 1051 DAG size of output: 1027 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:54:48,299 WARN L233 SmtUtils]: Spent 18.94s on a formula simplification. DAG size of input: 1057 DAG size of output: 1033 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:54:57,575 WARN L233 SmtUtils]: Spent 8.55s on a formula simplification that was a NOOP. DAG size: 1014 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:55:06,793 WARN L233 SmtUtils]: Spent 8.68s on a formula simplification that was a NOOP. DAG size: 1018 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:55:16,520 WARN L233 SmtUtils]: Spent 8.78s on a formula simplification that was a NOOP. DAG size: 1023 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:55:28,630 WARN L233 SmtUtils]: Spent 11.11s on a formula simplification. DAG size of input: 758 DAG size of output: 660 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:55:40,325 WARN L233 SmtUtils]: Spent 11.21s on a formula simplification. DAG size of input: 768 DAG size of output: 670 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:56:01,888 WARN L233 SmtUtils]: Spent 20.94s on a formula simplification. DAG size of input: 779 DAG size of output: 761 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:56:23,708 WARN L233 SmtUtils]: Spent 20.92s on a formula simplification. DAG size of input: 779 DAG size of output: 761 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:56:46,082 WARN L233 SmtUtils]: Spent 13.28s on a formula simplification. DAG size of input: 805 DAG size of output: 761 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:57:00,184 WARN L233 SmtUtils]: Spent 13.37s on a formula simplification. DAG size of input: 808 DAG size of output: 750 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:57:37,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:42,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:57:54,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:04,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:06,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:07,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:10,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:11,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:14,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:35,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:37,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 13:58:40,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:58:40,135 INFO L93 Difference]: Finished difference Result 13021 states and 17693 transitions. [2022-11-23 13:58:40,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-23 13:58:40,136 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 100 [2022-11-23 13:58:40,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:58:40,159 INFO L225 Difference]: With dead ends: 13021 [2022-11-23 13:58:40,159 INFO L226 Difference]: Without dead ends: 6709 [2022-11-23 13:58:40,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 395.6s TimeCoverageRelationStatistics Valid=297, Invalid=2673, Unknown=0, NotChecked=0, Total=2970 [2022-11-23 13:58:40,175 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 299 mSDsluCounter, 5057 mSDsCounter, 0 mSdLazyCounter, 3725 mSolverCounterSat, 107 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 5661 SdHoareTripleChecker+Invalid, 3837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 3725 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 106.6s IncrementalHoareTripleChecker+Time [2022-11-23 13:58:40,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 5661 Invalid, 3837 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [107 Valid, 3725 Invalid, 5 Unknown, 0 Unchecked, 106.6s Time] [2022-11-23 13:58:40,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6709 states. [2022-11-23 13:58:40,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6709 to 6561. [2022-11-23 13:58:40,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6561 states, 4362 states have (on average 1.3392939018798715) internal successors, (5842), 4525 states have internal predecessors, (5842), 1508 states have call successors, (1508), 694 states have call predecessors, (1508), 690 states have return successors, (1549), 1421 states have call predecessors, (1549), 1506 states have call successors, (1549) [2022-11-23 13:58:40,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6561 states to 6561 states and 8899 transitions. [2022-11-23 13:58:40,823 INFO L78 Accepts]: Start accepts. Automaton has 6561 states and 8899 transitions. Word has length 100 [2022-11-23 13:58:40,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:58:40,823 INFO L495 AbstractCegarLoop]: Abstraction has 6561 states and 8899 transitions. [2022-11-23 13:58:40,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 25 states have internal predecessors, (50), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-23 13:58:40,824 INFO L276 IsEmpty]: Start isEmpty. Operand 6561 states and 8899 transitions. [2022-11-23 13:58:40,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-23 13:58:40,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:58:40,900 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:58:40,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 13:58:41,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 13:58:41,101 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:58:41,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:58:41,102 INFO L85 PathProgramCache]: Analyzing trace with hash -143345502, now seen corresponding path program 1 times [2022-11-23 13:58:41,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:58:41,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830674095] [2022-11-23 13:58:41,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:41,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:58:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 13:58:41,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:58:41,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830674095] [2022-11-23 13:58:41,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830674095] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:58:41,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347345080] [2022-11-23 13:58:41,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:58:41,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:58:41,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:58:41,367 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:58:41,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b61718ed-d592-471c-910a-e9748721c875/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 13:58:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:58:42,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 1824 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:58:42,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:58:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 13:58:42,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:58:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 13:58:42,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347345080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:58:42,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [161688075] [2022-11-23 13:58:42,257 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2022-11-23 13:58:42,257 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:58:42,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:58:42,258 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:58:42,258 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:58:43,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:43,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:43,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:43,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:43,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:43,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:43,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:43,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:43,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:43,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:43,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:43,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 66 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 98 [2022-11-23 13:58:43,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 13:58:43,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 175 [2022-11-23 13:58:44,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:44,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:44,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:44,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:44,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:44,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:44,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:44,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:44,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:44,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:44,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:44,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:44,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 78 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 107 [2022-11-23 13:58:45,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 13:58:45,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 13:58:45,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-23 13:58:45,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 509 treesize of output 401 [2022-11-23 13:58:45,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:45,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 24 select indices, 24 select index equivalence classes, 276 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 73 [2022-11-23 13:58:46,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2022-11-23 13:58:47,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 509 treesize of output 401 [2022-11-23 13:58:47,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 55 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 34 [2022-11-23 13:58:47,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:58:47,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 24 select indices, 24 select index equivalence classes, 276 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 73 [2022-11-23 13:59:00,990 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 223 for LOIs [2022-11-23 13:59:01,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 13:59:01,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-23 13:59:01,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 13:59:03,306 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 251 for LOIs [2022-11-23 13:59:03,554 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 123 for LOIs [2022-11-23 13:59:03,586 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:59:12,645 WARN L233 SmtUtils]: Spent 8.49s on a formula simplification that was a NOOP. DAG size: 1010 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:59:47,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [161688075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:59:47,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:59:47,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [4, 4, 4] total 42 [2022-11-23 13:59:47,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227520420] [2022-11-23 13:59:47,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:59:47,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-23 13:59:47,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:59:47,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-23 13:59:47,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2022-11-23 13:59:47,901 INFO L87 Difference]: Start difference. First operand 6561 states and 8899 transitions. Second operand has 37 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 27 states have internal predecessors, (53), 7 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-23 14:00:11,681 WARN L233 SmtUtils]: Spent 17.48s on a formula simplification. DAG size of input: 1025 DAG size of output: 1015 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:00:29,885 WARN L233 SmtUtils]: Spent 17.71s on a formula simplification. DAG size of input: 1033 DAG size of output: 1023 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:00:49,972 WARN L233 SmtUtils]: Spent 19.55s on a formula simplification. DAG size of input: 1060 DAG size of output: 1040 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:01:09,699 WARN L233 SmtUtils]: Spent 19.12s on a formula simplification. DAG size of input: 1061 DAG size of output: 1049 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:01:29,832 WARN L233 SmtUtils]: Spent 19.61s on a formula simplification. DAG size of input: 1073 DAG size of output: 1043 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)