./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--esd_usb2.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_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/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_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/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--esd_usb2.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/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_18a32d31-4e64-45ec-b969-a8f93b5f0b74/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 781669661afd0476205c0d0f127c7931dffbaabf4aae46244e576c29ee5a8115 --- 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 14:04:44,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:04:44,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:04:44,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:04:44,759 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:04:44,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:04:44,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:04:44,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:04:44,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:04:44,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:04:44,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:04:44,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:04:44,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:04:44,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:04:44,777 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:04:44,778 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:04:44,779 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:04:44,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:04:44,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:04:44,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:04:44,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:04:44,786 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:04:44,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:04:44,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:04:44,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:04:44,792 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:04:44,792 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:04:44,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:04:44,794 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:04:44,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:04:44,796 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:04:44,796 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:04:44,797 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:04:44,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:04:44,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:04:44,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:04:44,800 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:04:44,801 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:04:44,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:04:44,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:04:44,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:04:44,804 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 14:04:44,825 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:04:44,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:04:44,826 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:04:44,827 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:04:44,841 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:04:44,842 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:04:44,842 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:04:44,842 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:04:44,843 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:04:44,843 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:04:44,843 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:04:44,844 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:04:44,844 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:04:44,844 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:04:44,845 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:04:44,845 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:04:44,845 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:04:44,846 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:04:44,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:04:44,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:04:44,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:04:44,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:04:44,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:04:44,848 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:04:44,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:04:44,848 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:04:44,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:04:44,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:04:44,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:04:44,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:04:44,850 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:04:44,850 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:04:44,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:04:44,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:04:44,851 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:04:44,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:04:44,851 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:04:44,852 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:04:44,852 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_18a32d31-4e64-45ec-b969-a8f93b5f0b74/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 781669661afd0476205c0d0f127c7931dffbaabf4aae46244e576c29ee5a8115 [2022-11-23 14:04:45,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:04:45,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:04:45,237 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:04:45,238 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:04:45,238 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:04:45,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2022-11-23 14:04:48,405 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:04:49,050 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:04:49,051 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2022-11-23 14:04:49,092 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/data/3749cceee/d15d37b759594273ac932c1fcf403213/FLAG801b67eac [2022-11-23 14:04:49,116 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/data/3749cceee/d15d37b759594273ac932c1fcf403213 [2022-11-23 14:04:49,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:04:49,122 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:04:49,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:04:49,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:04:49,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:04:49,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:04:49" (1/1) ... [2022-11-23 14:04:49,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a1ad318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:49, skipping insertion in model container [2022-11-23 14:04:49,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:04:49" (1/1) ... [2022-11-23 14:04:49,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:04:49,243 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:04:50,229 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_18a32d31-4e64-45ec-b969-a8f93b5f0b74/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i[163937,163950] [2022-11-23 14:04:50,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:04:50,923 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:04:51,084 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_18a32d31-4e64-45ec-b969-a8f93b5f0b74/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i[163937,163950] [2022-11-23 14:04:51,323 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:04:51,449 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:04:51,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:51 WrapperNode [2022-11-23 14:04:51,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:04:51,467 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:04:51,467 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:04:51,467 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:04:51,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:51" (1/1) ... [2022-11-23 14:04:51,559 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:51" (1/1) ... [2022-11-23 14:04:51,686 INFO L138 Inliner]: procedures = 160, calls = 847, calls flagged for inlining = 71, calls inlined = 71, statements flattened = 2346 [2022-11-23 14:04:51,686 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:04:51,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:04:51,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:04:51,688 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:04:51,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:51" (1/1) ... [2022-11-23 14:04:51,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:51" (1/1) ... [2022-11-23 14:04:51,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:51" (1/1) ... [2022-11-23 14:04:51,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:51" (1/1) ... [2022-11-23 14:04:51,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:51" (1/1) ... [2022-11-23 14:04:51,854 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:51" (1/1) ... [2022-11-23 14:04:51,864 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:51" (1/1) ... [2022-11-23 14:04:51,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:51" (1/1) ... [2022-11-23 14:04:51,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:04:51,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:04:51,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:04:51,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:04:51,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:51" (1/1) ... [2022-11-23 14:04:51,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:04:51,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:04:51,938 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:04:51,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:04:51,994 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-11-23 14:04:51,994 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-11-23 14:04:51,994 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_2 [2022-11-23 14:04:51,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_2 [2022-11-23 14:04:51,995 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_17 [2022-11-23 14:04:51,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_17 [2022-11-23 14:04:51,995 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2022-11-23 14:04:51,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2022-11-23 14:04:51,995 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2022-11-23 14:04:51,995 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2022-11-23 14:04:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 14:04:51,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 14:04:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:04:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-11-23 14:04:51,996 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-11-23 14:04:51,996 INFO L130 BoogieDeclarations]: Found specification of procedure can_free_echo_skb [2022-11-23 14:04:51,997 INFO L138 BoogieDeclarations]: Found implementation of procedure can_free_echo_skb [2022-11-23 14:04:51,997 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-11-23 14:04:51,997 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-11-23 14:04:51,997 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2022-11-23 14:04:51,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2022-11-23 14:04:51,997 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-23 14:04:51,998 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-23 14:04:51,998 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-23 14:04:51,998 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-23 14:04:51,999 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 14:04:51,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 14:04:52,000 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2022-11-23 14:04:52,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2022-11-23 14:04:52,001 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2022-11-23 14:04:52,001 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2022-11-23 14:04:52,001 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 14:04:52,001 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 14:04:52,001 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2022-11-23 14:04:52,001 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2022-11-23 14:04:52,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:04:52,002 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-23 14:04:52,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-23 14:04:52,002 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2022-11-23 14:04:52,002 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2022-11-23 14:04:52,003 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 14:04:52,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 14:04:52,003 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 14:04:52,003 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 14:04:52,003 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-23 14:04:52,003 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-23 14:04:52,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:04:52,004 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2022-11-23 14:04:52,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2022-11-23 14:04:52,005 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_4 [2022-11-23 14:04:52,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_4 [2022-11-23 14:04:52,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:04:52,005 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-11-23 14:04:52,006 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-11-23 14:04:52,006 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-23 14:04:52,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-23 14:04:52,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:04:52,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 14:04:52,007 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 14:04:52,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-23 14:04:52,007 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-11-23 14:04:52,007 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-11-23 14:04:52,007 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2022-11-23 14:04:52,008 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2022-11-23 14:04:52,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 14:04:52,008 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-11-23 14:04:52,008 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-11-23 14:04:52,008 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2022-11-23 14:04:52,008 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2022-11-23 14:04:52,009 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2022-11-23 14:04:52,009 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2022-11-23 14:04:52,009 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:04:52,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 14:04:52,010 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-11-23 14:04:52,011 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-11-23 14:04:52,011 INFO L130 BoogieDeclarations]: Found specification of procedure esd_usb2_read_bulk_callback [2022-11-23 14:04:52,011 INFO L138 BoogieDeclarations]: Found implementation of procedure esd_usb2_read_bulk_callback [2022-11-23 14:04:52,011 INFO L130 BoogieDeclarations]: Found specification of procedure esd_usb2_send_msg [2022-11-23 14:04:52,012 INFO L138 BoogieDeclarations]: Found implementation of procedure esd_usb2_send_msg [2022-11-23 14:04:52,012 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2022-11-23 14:04:52,013 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2022-11-23 14:04:52,013 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-23 14:04:52,013 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-23 14:04:52,013 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-23 14:04:52,013 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-23 14:04:52,013 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2022-11-23 14:04:52,014 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2022-11-23 14:04:52,014 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-23 14:04:52,014 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-23 14:04:52,014 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2022-11-23 14:04:52,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2022-11-23 14:04:52,015 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2022-11-23 14:04:52,015 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2022-11-23 14:04:52,016 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:04:52,016 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2022-11-23 14:04:52,016 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2022-11-23 14:04:52,016 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-23 14:04:52,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-23 14:04:52,016 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2022-11-23 14:04:52,017 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2022-11-23 14:04:52,017 INFO L130 BoogieDeclarations]: Found specification of procedure esd_usb2_disconnect [2022-11-23 14:04:52,017 INFO L138 BoogieDeclarations]: Found implementation of procedure esd_usb2_disconnect [2022-11-23 14:04:52,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:04:52,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:04:52,732 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:04:52,735 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:04:52,886 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 14:04:53,612 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2022-11-23 14:04:54,959 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:04:55,653 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:04:55,654 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 14:04:55,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:04:55 BoogieIcfgContainer [2022-11-23 14:04:55,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:04:55,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:04:55,660 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:04:55,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:04:55,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:04:49" (1/3) ... [2022-11-23 14:04:55,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7181d393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:04:55, skipping insertion in model container [2022-11-23 14:04:55,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:51" (2/3) ... [2022-11-23 14:04:55,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7181d393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:04:55, skipping insertion in model container [2022-11-23 14:04:55,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:04:55" (3/3) ... [2022-11-23 14:04:55,667 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2022-11-23 14:04:55,685 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:04:55,685 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:04:55,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:04:55,752 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;@290886f9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:04:55,753 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:04:55,760 INFO L276 IsEmpty]: Start isEmpty. Operand has 516 states, 328 states have (on average 1.3902439024390243) internal successors, (456), 356 states have internal predecessors, (456), 142 states have call successors, (142), 46 states have call predecessors, (142), 44 states have return successors, (133), 132 states have call predecessors, (133), 133 states have call successors, (133) [2022-11-23 14:04:55,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-23 14:04:55,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:04:55,773 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:04:55,774 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:04:55,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:04:55,780 INFO L85 PathProgramCache]: Analyzing trace with hash -320779330, now seen corresponding path program 1 times [2022-11-23 14:04:55,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:04:55,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340399015] [2022-11-23 14:04:55,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:04:55,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:04:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:04:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-23 14:04:56,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:04:56,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340399015] [2022-11-23 14:04:56,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340399015] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:04:56,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:04:56,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:04:56,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474078320] [2022-11-23 14:04:56,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:04:56,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:04:56,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:04:56,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:04:56,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:04:56,558 INFO L87 Difference]: Start difference. First operand has 516 states, 328 states have (on average 1.3902439024390243) internal successors, (456), 356 states have internal predecessors, (456), 142 states have call successors, (142), 46 states have call predecessors, (142), 44 states have return successors, (133), 132 states have call predecessors, (133), 133 states have call successors, (133) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-23 14:04:59,359 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 14:05:01,529 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 14:05:01,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:01,561 INFO L93 Difference]: Finished difference Result 1475 states and 2086 transitions. [2022-11-23 14:05:01,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:05:01,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 78 [2022-11-23 14:05:01,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:01,591 INFO L225 Difference]: With dead ends: 1475 [2022-11-23 14:05:01,591 INFO L226 Difference]: Without dead ends: 958 [2022-11-23 14:05:01,601 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 14:05:01,606 INFO L413 NwaCegarLoop]: 736 mSDtfsCounter, 649 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:01,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 1347 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 214 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-11-23 14:05:01,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-11-23 14:05:01,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 956. [2022-11-23 14:05:01,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 623 states have (on average 1.3595505617977528) internal successors, (847), 654 states have internal predecessors, (847), 246 states have call successors, (246), 87 states have call predecessors, (246), 86 states have return successors, (242), 238 states have call predecessors, (242), 241 states have call successors, (242) [2022-11-23 14:05:01,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1335 transitions. [2022-11-23 14:05:01,796 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1335 transitions. Word has length 78 [2022-11-23 14:05:01,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:01,797 INFO L495 AbstractCegarLoop]: Abstraction has 956 states and 1335 transitions. [2022-11-23 14:05:01,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-23 14:05:01,798 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1335 transitions. [2022-11-23 14:05:01,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-23 14:05:01,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:01,809 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:05:01,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:05:01,810 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:05:01,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:01,810 INFO L85 PathProgramCache]: Analyzing trace with hash -424863314, now seen corresponding path program 1 times [2022-11-23 14:05:01,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:01,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694549146] [2022-11-23 14:05:01,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:01,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-23 14:05:02,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:02,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694549146] [2022-11-23 14:05:02,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694549146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:02,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:05:02,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:05:02,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134298912] [2022-11-23 14:05:02,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:02,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:05:02,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:02,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:05:02,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:05:02,426 INFO L87 Difference]: Start difference. First operand 956 states and 1335 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-23 14:05:04,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:05:07,270 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 14:05:07,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:07,288 INFO L93 Difference]: Finished difference Result 1512 states and 2106 transitions. [2022-11-23 14:05:07,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:05:07,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 87 [2022-11-23 14:05:07,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:07,303 INFO L225 Difference]: With dead ends: 1512 [2022-11-23 14:05:07,304 INFO L226 Difference]: Without dead ends: 1509 [2022-11-23 14:05:07,306 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 14:05:07,307 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 392 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 1238 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:07,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 1238 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 209 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-11-23 14:05:07,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2022-11-23 14:05:07,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1495. [2022-11-23 14:05:07,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 980 states have (on average 1.3653061224489795) internal successors, (1338), 1025 states have internal predecessors, (1338), 376 states have call successors, (376), 141 states have call predecessors, (376), 138 states have return successors, (372), 360 states have call predecessors, (372), 371 states have call successors, (372) [2022-11-23 14:05:07,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 2086 transitions. [2022-11-23 14:05:07,442 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 2086 transitions. Word has length 87 [2022-11-23 14:05:07,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:07,443 INFO L495 AbstractCegarLoop]: Abstraction has 1495 states and 2086 transitions. [2022-11-23 14:05:07,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-23 14:05:07,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 2086 transitions. [2022-11-23 14:05:07,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-23 14:05:07,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:07,446 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:05:07,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:05:07,447 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:05:07,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:07,447 INFO L85 PathProgramCache]: Analyzing trace with hash -286170203, now seen corresponding path program 1 times [2022-11-23 14:05:07,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:07,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858857868] [2022-11-23 14:05:07,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:07,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-23 14:05:07,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:07,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858857868] [2022-11-23 14:05:07,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858857868] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:07,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:05:07,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:05:07,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471900806] [2022-11-23 14:05:07,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:07,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:05:07,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:07,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:05:07,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:05:07,957 INFO L87 Difference]: Start difference. First operand 1495 states and 2086 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-23 14:05:10,401 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 14:05:12,616 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 14:05:12,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:12,885 INFO L93 Difference]: Finished difference Result 2425 states and 3381 transitions. [2022-11-23 14:05:12,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:05:12,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 88 [2022-11-23 14:05:12,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:12,902 INFO L225 Difference]: With dead ends: 2425 [2022-11-23 14:05:12,903 INFO L226 Difference]: Without dead ends: 2422 [2022-11-23 14:05:12,905 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 14:05:12,906 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 654 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:12,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 1295 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 213 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-11-23 14:05:12,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2022-11-23 14:05:13,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 2411. [2022-11-23 14:05:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 1582 states have (on average 1.3647281921618204) internal successors, (2159), 1655 states have internal predecessors, (2159), 604 states have call successors, (604), 227 states have call predecessors, (604), 224 states have return successors, (602), 584 states have call predecessors, (602), 599 states have call successors, (602) [2022-11-23 14:05:13,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 3365 transitions. [2022-11-23 14:05:13,158 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 3365 transitions. Word has length 88 [2022-11-23 14:05:13,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:13,159 INFO L495 AbstractCegarLoop]: Abstraction has 2411 states and 3365 transitions. [2022-11-23 14:05:13,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-23 14:05:13,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 3365 transitions. [2022-11-23 14:05:13,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-23 14:05:13,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:13,170 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:05:13,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:05:13,171 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:05:13,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:13,171 INFO L85 PathProgramCache]: Analyzing trace with hash -281646191, now seen corresponding path program 1 times [2022-11-23 14:05:13,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:13,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826611002] [2022-11-23 14:05:13,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:13,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:13,363 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-23 14:05:13,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:13,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826611002] [2022-11-23 14:05:13,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826611002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:13,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:05:13,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:05:13,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113627944] [2022-11-23 14:05:13,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:13,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:05:13,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:13,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:05:13,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:05:13,367 INFO L87 Difference]: Start difference. First operand 2411 states and 3365 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-23 14:05:15,765 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 14:05:17,959 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 14:05:18,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:18,275 INFO L93 Difference]: Finished difference Result 2420 states and 3374 transitions. [2022-11-23 14:05:18,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:05:18,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 89 [2022-11-23 14:05:18,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:18,290 INFO L225 Difference]: With dead ends: 2420 [2022-11-23 14:05:18,290 INFO L226 Difference]: Without dead ends: 2417 [2022-11-23 14:05:18,292 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 14:05:18,293 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 651 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:18,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 1290 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 212 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-11-23 14:05:18,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2022-11-23 14:05:18,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 2412. [2022-11-23 14:05:18,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 1583 states have (on average 1.3644977890082122) internal successors, (2160), 1656 states have internal predecessors, (2160), 604 states have call successors, (604), 227 states have call predecessors, (604), 224 states have return successors, (602), 584 states have call predecessors, (602), 599 states have call successors, (602) [2022-11-23 14:05:18,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 3366 transitions. [2022-11-23 14:05:18,496 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 3366 transitions. Word has length 89 [2022-11-23 14:05:18,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:18,497 INFO L495 AbstractCegarLoop]: Abstraction has 2412 states and 3366 transitions. [2022-11-23 14:05:18,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-23 14:05:18,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 3366 transitions. [2022-11-23 14:05:18,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-23 14:05:18,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:18,499 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:05:18,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:05:18,500 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:05:18,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:18,500 INFO L85 PathProgramCache]: Analyzing trace with hash -141396952, now seen corresponding path program 1 times [2022-11-23 14:05:18,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:18,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381910812] [2022-11-23 14:05:18,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:18,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-23 14:05:18,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:18,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381910812] [2022-11-23 14:05:18,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381910812] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:18,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:05:18,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:05:18,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551370159] [2022-11-23 14:05:18,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:18,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:05:18,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:18,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:05:18,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:05:18,665 INFO L87 Difference]: Start difference. First operand 2412 states and 3366 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-23 14:05:21,077 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 14:05:23,360 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 14:05:23,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:23,660 INFO L93 Difference]: Finished difference Result 2421 states and 3375 transitions. [2022-11-23 14:05:23,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:05:23,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 90 [2022-11-23 14:05:23,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:23,674 INFO L225 Difference]: With dead ends: 2421 [2022-11-23 14:05:23,675 INFO L226 Difference]: Without dead ends: 2418 [2022-11-23 14:05:23,676 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 14:05:23,678 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 648 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:23,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 1293 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 212 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-11-23 14:05:23,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2418 states. [2022-11-23 14:05:23,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2418 to 2413. [2022-11-23 14:05:23,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 1584 states have (on average 1.3642676767676767) internal successors, (2161), 1657 states have internal predecessors, (2161), 604 states have call successors, (604), 227 states have call predecessors, (604), 224 states have return successors, (602), 584 states have call predecessors, (602), 599 states have call successors, (602) [2022-11-23 14:05:23,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 3367 transitions. [2022-11-23 14:05:23,821 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 3367 transitions. Word has length 90 [2022-11-23 14:05:23,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:23,822 INFO L495 AbstractCegarLoop]: Abstraction has 2413 states and 3367 transitions. [2022-11-23 14:05:23,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-23 14:05:23,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 3367 transitions. [2022-11-23 14:05:23,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-23 14:05:23,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:23,825 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:05:23,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:05:23,825 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:05:23,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:23,826 INFO L85 PathProgramCache]: Analyzing trace with hash -88632972, now seen corresponding path program 1 times [2022-11-23 14:05:23,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:23,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950020430] [2022-11-23 14:05:23,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:23,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-23 14:05:23,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:23,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950020430] [2022-11-23 14:05:23,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950020430] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:23,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:05:23,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:05:23,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859330130] [2022-11-23 14:05:23,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:23,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:05:23,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:23,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:05:23,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:05:23,988 INFO L87 Difference]: Start difference. First operand 2413 states and 3367 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-23 14:05:26,391 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 14:05:28,636 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 14:05:28,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:28,947 INFO L93 Difference]: Finished difference Result 2422 states and 3375 transitions. [2022-11-23 14:05:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:05:28,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 91 [2022-11-23 14:05:28,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:28,963 INFO L225 Difference]: With dead ends: 2422 [2022-11-23 14:05:28,963 INFO L226 Difference]: Without dead ends: 2413 [2022-11-23 14:05:28,965 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 14:05:28,966 INFO L413 NwaCegarLoop]: 731 mSDtfsCounter, 645 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:28,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 1297 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 211 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-11-23 14:05:28,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2022-11-23 14:05:29,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 2408. [2022-11-23 14:05:29,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 1579 states have (on average 1.362887903736542) internal successors, (2152), 1652 states have internal predecessors, (2152), 604 states have call successors, (604), 227 states have call predecessors, (604), 224 states have return successors, (602), 584 states have call predecessors, (602), 599 states have call successors, (602) [2022-11-23 14:05:29,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 3358 transitions. [2022-11-23 14:05:29,153 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 3358 transitions. Word has length 91 [2022-11-23 14:05:29,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:29,154 INFO L495 AbstractCegarLoop]: Abstraction has 2408 states and 3358 transitions. [2022-11-23 14:05:29,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-23 14:05:29,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 3358 transitions. [2022-11-23 14:05:29,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-23 14:05:29,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:29,157 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:05:29,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:05:29,158 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:05:29,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:29,158 INFO L85 PathProgramCache]: Analyzing trace with hash -2095715769, now seen corresponding path program 1 times [2022-11-23 14:05:29,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:29,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570623934] [2022-11-23 14:05:29,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:29,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-11-23 14:05:29,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:29,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570623934] [2022-11-23 14:05:29,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570623934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:29,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:05:29,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:05:29,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869766469] [2022-11-23 14:05:29,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:29,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:05:29,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:29,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:05:29,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:05:29,359 INFO L87 Difference]: Start difference. First operand 2408 states and 3358 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 14:05:32,122 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 14:05:34,314 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 14:05:34,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:34,373 INFO L93 Difference]: Finished difference Result 5782 states and 8025 transitions. [2022-11-23 14:05:34,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:05:34,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 127 [2022-11-23 14:05:34,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:34,391 INFO L225 Difference]: With dead ends: 5782 [2022-11-23 14:05:34,391 INFO L226 Difference]: Without dead ends: 3397 [2022-11-23 14:05:34,399 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 14:05:34,400 INFO L413 NwaCegarLoop]: 658 mSDtfsCounter, 270 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:34,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 1214 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 219 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-11-23 14:05:34,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3397 states. [2022-11-23 14:05:34,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3397 to 3380. [2022-11-23 14:05:34,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3380 states, 2228 states have (on average 1.3617594254937164) internal successors, (3034), 2319 states have internal predecessors, (3034), 821 states have call successors, (821), 333 states have call predecessors, (821), 330 states have return successors, (819), 795 states have call predecessors, (819), 816 states have call successors, (819) [2022-11-23 14:05:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3380 states to 3380 states and 4674 transitions. [2022-11-23 14:05:34,618 INFO L78 Accepts]: Start accepts. Automaton has 3380 states and 4674 transitions. Word has length 127 [2022-11-23 14:05:34,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:34,619 INFO L495 AbstractCegarLoop]: Abstraction has 3380 states and 4674 transitions. [2022-11-23 14:05:34,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-23 14:05:34,620 INFO L276 IsEmpty]: Start isEmpty. Operand 3380 states and 4674 transitions. [2022-11-23 14:05:34,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-23 14:05:34,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:34,627 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 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, 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 14:05:34,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:05:34,627 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:05:34,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:34,628 INFO L85 PathProgramCache]: Analyzing trace with hash 14628566, now seen corresponding path program 1 times [2022-11-23 14:05:34,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:34,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824894738] [2022-11-23 14:05:34,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:34,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-11-23 14:05:34,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:34,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824894738] [2022-11-23 14:05:34,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824894738] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:34,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:05:34,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:05:34,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683436981] [2022-11-23 14:05:34,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:34,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:05:34,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:34,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:05:34,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:05:34,898 INFO L87 Difference]: Start difference. First operand 3380 states and 4674 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-23 14:05:37,572 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 14:05:39,789 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 14:05:39,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:39,887 INFO L93 Difference]: Finished difference Result 7774 states and 10751 transitions. [2022-11-23 14:05:39,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:05:39,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 140 [2022-11-23 14:05:39,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:39,913 INFO L225 Difference]: With dead ends: 7774 [2022-11-23 14:05:39,913 INFO L226 Difference]: Without dead ends: 4423 [2022-11-23 14:05:39,923 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 14:05:39,924 INFO L413 NwaCegarLoop]: 799 mSDtfsCounter, 247 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:39,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 1385 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 255 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-11-23 14:05:39,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4423 states. [2022-11-23 14:05:40,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4423 to 4406. [2022-11-23 14:05:40,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4406 states, 2933 states have (on average 1.3641322877599726) internal successors, (4001), 3042 states have internal predecessors, (4001), 1037 states have call successors, (1037), 438 states have call predecessors, (1037), 435 states have return successors, (1035), 1005 states have call predecessors, (1035), 1032 states have call successors, (1035) [2022-11-23 14:05:40,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4406 states to 4406 states and 6073 transitions. [2022-11-23 14:05:40,235 INFO L78 Accepts]: Start accepts. Automaton has 4406 states and 6073 transitions. Word has length 140 [2022-11-23 14:05:40,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:40,235 INFO L495 AbstractCegarLoop]: Abstraction has 4406 states and 6073 transitions. [2022-11-23 14:05:40,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-23 14:05:40,237 INFO L276 IsEmpty]: Start isEmpty. Operand 4406 states and 6073 transitions. [2022-11-23 14:05:40,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-23 14:05:40,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:40,243 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:05:40,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:05:40,244 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:05:40,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:40,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1995279371, now seen corresponding path program 1 times [2022-11-23 14:05:40,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:40,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080188210] [2022-11-23 14:05:40,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:40,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2022-11-23 14:05:40,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:40,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080188210] [2022-11-23 14:05:40,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080188210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:05:40,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896363547] [2022-11-23 14:05:40,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:40,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:40,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:05:40,639 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:05:40,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:05:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:41,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 1819 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:05:41,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:41,501 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-11-23 14:05:41,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:05:41,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896363547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:41,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:05:41,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-23 14:05:41,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851915302] [2022-11-23 14:05:41,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:41,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:05:41,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:41,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:05:41,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:05:41,506 INFO L87 Difference]: Start difference. First operand 4406 states and 6073 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 14:05:44,618 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 14:05:46,935 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 14:05:47,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:47,121 INFO L93 Difference]: Finished difference Result 9770 states and 13927 transitions. [2022-11-23 14:05:47,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:05:47,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 151 [2022-11-23 14:05:47,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:47,175 INFO L225 Difference]: With dead ends: 9770 [2022-11-23 14:05:47,175 INFO L226 Difference]: Without dead ends: 6564 [2022-11-23 14:05:47,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:05:47,189 INFO L413 NwaCegarLoop]: 859 mSDtfsCounter, 386 mSDsluCounter, 1301 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 96 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 2160 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:47,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 2160 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 349 Invalid, 2 Unknown, 0 Unchecked, 5.2s Time] [2022-11-23 14:05:47,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6564 states. [2022-11-23 14:05:47,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6564 to 4418. [2022-11-23 14:05:47,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4418 states, 2945 states have (on average 1.3626485568760611) internal successors, (4013), 3054 states have internal predecessors, (4013), 1037 states have call successors, (1037), 438 states have call predecessors, (1037), 435 states have return successors, (1035), 1005 states have call predecessors, (1035), 1032 states have call successors, (1035) [2022-11-23 14:05:47,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4418 states to 4418 states and 6085 transitions. [2022-11-23 14:05:47,601 INFO L78 Accepts]: Start accepts. Automaton has 4418 states and 6085 transitions. Word has length 151 [2022-11-23 14:05:47,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:47,602 INFO L495 AbstractCegarLoop]: Abstraction has 4418 states and 6085 transitions. [2022-11-23 14:05:47,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-23 14:05:47,602 INFO L276 IsEmpty]: Start isEmpty. Operand 4418 states and 6085 transitions. [2022-11-23 14:05:47,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-23 14:05:47,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:47,608 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:05:47,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:05:47,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:47,817 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:05:47,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:47,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1454983489, now seen corresponding path program 1 times [2022-11-23 14:05:47,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:47,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210997331] [2022-11-23 14:05:47,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:47,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-11-23 14:05:48,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:48,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210997331] [2022-11-23 14:05:48,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210997331] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:05:48,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865645969] [2022-11-23 14:05:48,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:48,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:48,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:05:48,651 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:05:48,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:05:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:49,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 1841 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:05:49,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:05:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 70 proven. 10 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-11-23 14:05:49,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:05:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2022-11-23 14:05:50,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865645969] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 14:05:50,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:05:50,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 11 [2022-11-23 14:05:50,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581143987] [2022-11-23 14:05:50,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:50,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:05:50,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:50,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:05:50,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:05:50,055 INFO L87 Difference]: Start difference. First operand 4418 states and 6085 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-23 14:05:53,466 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 14:05:56,231 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 14:05:56,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:05:56,503 INFO L93 Difference]: Finished difference Result 10999 states and 15193 transitions. [2022-11-23 14:05:56,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:05:56,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 160 [2022-11-23 14:05:56,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:05:56,540 INFO L225 Difference]: With dead ends: 10999 [2022-11-23 14:05:56,540 INFO L226 Difference]: Without dead ends: 6610 [2022-11-23 14:05:56,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:05:56,554 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 1080 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 228 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:05:56,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1132 Valid, 1589 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 485 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2022-11-23 14:05:56,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6610 states. [2022-11-23 14:05:57,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6610 to 6032. [2022-11-23 14:05:57,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6032 states, 4024 states have (on average 1.3623260437375746) internal successors, (5482), 4171 states have internal predecessors, (5482), 1369 states have call successors, (1369), 643 states have call predecessors, (1369), 638 states have return successors, (1371), 1325 states have call predecessors, (1371), 1364 states have call successors, (1371) [2022-11-23 14:05:57,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6032 states to 6032 states and 8222 transitions. [2022-11-23 14:05:57,139 INFO L78 Accepts]: Start accepts. Automaton has 6032 states and 8222 transitions. Word has length 160 [2022-11-23 14:05:57,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:05:57,140 INFO L495 AbstractCegarLoop]: Abstraction has 6032 states and 8222 transitions. [2022-11-23 14:05:57,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2022-11-23 14:05:57,141 INFO L276 IsEmpty]: Start isEmpty. Operand 6032 states and 8222 transitions. [2022-11-23 14:05:57,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-23 14:05:57,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:05:57,161 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:05:57,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:05:57,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:05:57,371 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:05:57,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:05:57,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1504559592, now seen corresponding path program 1 times [2022-11-23 14:05:57,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:05:57,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952413439] [2022-11-23 14:05:57,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:05:57,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:05:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:05:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-11-23 14:05:57,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:05:57,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952413439] [2022-11-23 14:05:57,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952413439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:05:57,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:05:57,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:05:57,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220554242] [2022-11-23 14:05:57,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:05:57,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:05:57,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:05:57,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:05:57,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:05:57,636 INFO L87 Difference]: Start difference. First operand 6032 states and 8222 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-23 14:06:00,440 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 14:06:03,035 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 14:06:03,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:03,196 INFO L93 Difference]: Finished difference Result 15718 states and 21428 transitions. [2022-11-23 14:06:03,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:03,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 188 [2022-11-23 14:06:03,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:03,229 INFO L225 Difference]: With dead ends: 15718 [2022-11-23 14:06:03,230 INFO L226 Difference]: Without dead ends: 9715 [2022-11-23 14:06:03,245 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 14:06:03,246 INFO L413 NwaCegarLoop]: 835 mSDtfsCounter, 591 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 1395 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:03,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 1395 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 237 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-11-23 14:06:03,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9715 states. [2022-11-23 14:06:03,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9715 to 9688. [2022-11-23 14:06:03,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9688 states, 6625 states have (on average 1.3737358490566038) internal successors, (9101), 6852 states have internal predecessors, (9101), 2041 states have call successors, (2041), 1030 states have call predecessors, (2041), 1021 states have return successors, (2051), 1981 states have call predecessors, (2051), 2036 states have call successors, (2051) [2022-11-23 14:06:04,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9688 states to 9688 states and 13193 transitions. [2022-11-23 14:06:04,107 INFO L78 Accepts]: Start accepts. Automaton has 9688 states and 13193 transitions. Word has length 188 [2022-11-23 14:06:04,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:04,108 INFO L495 AbstractCegarLoop]: Abstraction has 9688 states and 13193 transitions. [2022-11-23 14:06:04,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-23 14:06:04,108 INFO L276 IsEmpty]: Start isEmpty. Operand 9688 states and 13193 transitions. [2022-11-23 14:06:04,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-23 14:06:04,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:04,120 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 5, 5, 5, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:06:04,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:06:04,120 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:04,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:04,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1177771261, now seen corresponding path program 1 times [2022-11-23 14:06:04,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:04,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855990399] [2022-11-23 14:06:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:04,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-11-23 14:06:05,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:05,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855990399] [2022-11-23 14:06:05,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855990399] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:06:05,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831216943] [2022-11-23 14:06:05,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:05,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:05,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:05,181 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:06:05,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:06:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:05,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 1922 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:06:05,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2022-11-23 14:06:06,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:06:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-23 14:06:06,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831216943] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 14:06:06,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:06:06,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 5] total 12 [2022-11-23 14:06:06,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812623545] [2022-11-23 14:06:06,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:06,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:06:06,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:06,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:06:06,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:06:06,269 INFO L87 Difference]: Start difference. First operand 9688 states and 13193 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-23 14:06:09,674 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 14:06:13,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:06:15,473 WARN L539 Checker$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 14:06:17,574 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 14:06:17,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:17,695 INFO L93 Difference]: Finished difference Result 23600 states and 32869 transitions. [2022-11-23 14:06:17,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:06:17,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 176 [2022-11-23 14:06:17,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:17,748 INFO L225 Difference]: With dead ends: 23600 [2022-11-23 14:06:17,748 INFO L226 Difference]: Without dead ends: 13943 [2022-11-23 14:06:17,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:06:17,776 INFO L413 NwaCegarLoop]: 814 mSDtfsCounter, 695 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 16 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 1562 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:17,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 1562 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 583 Invalid, 4 Unknown, 0 Unchecked, 10.4s Time] [2022-11-23 14:06:17,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13943 states. [2022-11-23 14:06:18,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13943 to 11010. [2022-11-23 14:06:18,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11010 states, 7601 states have (on average 1.38205499276411) internal successors, (10505), 7845 states have internal predecessors, (10505), 2276 states have call successors, (2276), 1141 states have call predecessors, (2276), 1132 states have return successors, (2286), 2211 states have call predecessors, (2286), 2271 states have call successors, (2286) [2022-11-23 14:06:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11010 states to 11010 states and 15067 transitions. [2022-11-23 14:06:18,656 INFO L78 Accepts]: Start accepts. Automaton has 11010 states and 15067 transitions. Word has length 176 [2022-11-23 14:06:18,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:18,657 INFO L495 AbstractCegarLoop]: Abstraction has 11010 states and 15067 transitions. [2022-11-23 14:06:18,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-23 14:06:18,658 INFO L276 IsEmpty]: Start isEmpty. Operand 11010 states and 15067 transitions. [2022-11-23 14:06:18,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-23 14:06:18,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:18,670 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:06:18,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:18,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 14:06:18,881 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:18,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:18,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1088628335, now seen corresponding path program 1 times [2022-11-23 14:06:18,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:18,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663128672] [2022-11-23 14:06:18,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:18,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-23 14:06:19,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:19,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663128672] [2022-11-23 14:06:19,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663128672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:19,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:19,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:06:19,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332712558] [2022-11-23 14:06:19,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:19,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:19,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:19,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:19,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:19,237 INFO L87 Difference]: Start difference. First operand 11010 states and 15067 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-23 14:06:21,894 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 14:06:24,363 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 14:06:24,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:24,494 INFO L93 Difference]: Finished difference Result 22001 states and 30116 transitions. [2022-11-23 14:06:24,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:24,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 182 [2022-11-23 14:06:24,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:24,548 INFO L225 Difference]: With dead ends: 22001 [2022-11-23 14:06:24,549 INFO L226 Difference]: Without dead ends: 11022 [2022-11-23 14:06:24,577 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 14:06:24,578 INFO L413 NwaCegarLoop]: 599 mSDtfsCounter, 0 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:24,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1195 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 206 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2022-11-23 14:06:24,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11022 states. [2022-11-23 14:06:25,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11022 to 11022. [2022-11-23 14:06:25,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11022 states, 7613 states have (on average 1.3814527781426507) internal successors, (10517), 7857 states have internal predecessors, (10517), 2276 states have call successors, (2276), 1141 states have call predecessors, (2276), 1132 states have return successors, (2286), 2211 states have call predecessors, (2286), 2271 states have call successors, (2286) [2022-11-23 14:06:25,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11022 states to 11022 states and 15079 transitions. [2022-11-23 14:06:25,597 INFO L78 Accepts]: Start accepts. Automaton has 11022 states and 15079 transitions. Word has length 182 [2022-11-23 14:06:25,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:25,598 INFO L495 AbstractCegarLoop]: Abstraction has 11022 states and 15079 transitions. [2022-11-23 14:06:25,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2022-11-23 14:06:25,598 INFO L276 IsEmpty]: Start isEmpty. Operand 11022 states and 15079 transitions. [2022-11-23 14:06:25,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-23 14:06:25,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:25,610 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:06:25,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 14:06:25,611 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:25,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:25,611 INFO L85 PathProgramCache]: Analyzing trace with hash 431608227, now seen corresponding path program 1 times [2022-11-23 14:06:25,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:25,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170023520] [2022-11-23 14:06:25,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:25,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-23 14:06:25,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:25,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170023520] [2022-11-23 14:06:25,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170023520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:06:25,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798467410] [2022-11-23 14:06:25,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:25,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:25,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:25,997 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:06:26,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18a32d31-4e64-45ec-b969-a8f93b5f0b74/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:06:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:26,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 2097 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:06:26,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:26,893 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-11-23 14:06:26,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:06:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-11-23 14:06:27,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798467410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:06:27,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1914725153] [2022-11-23 14:06:27,062 INFO L159 IcfgInterpreter]: Started Sifa with 112 locations of interest [2022-11-23 14:06:27,062 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:06:27,067 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:06:27,074 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:06:27,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:06:31,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:31,814 INFO L217 Elim1Store]: Index analysis took 175 ms [2022-11-23 14:06:31,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 114 select indices, 114 select index equivalence classes, 1253 disjoint index pairs (out of 6441 index pairs), introduced 114 new quantified variables, introduced 0 case distinctions, treesize of input 1003 treesize of output 343 [2022-11-23 14:06:33,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:33,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:06:34,061 INFO L217 Elim1Store]: Index analysis took 161 ms [2022-11-23 14:06:34,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 114 select indices, 114 select index equivalence classes, 1253 disjoint index pairs (out of 6441 index pairs), introduced 114 new quantified variables, introduced 0 case distinctions, treesize of input 1003 treesize of output 343 [2022-11-23 14:08:11,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:08:11,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:08:11,926 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 14:08:45,592 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 14:08:45,600 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 14:08:50,393 INFO L197 IcfgInterpreter]: Interpreting procedure kmalloc with input of size 155 for LOIs [2022-11-23 14:08:50,672 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 261 for LOIs [2022-11-23 14:08:50,928 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 152 for LOIs [2022-11-23 14:08:50,970 INFO L197 IcfgInterpreter]: Interpreting procedure netdev_priv with input of size 147 for LOIs [2022-11-23 14:08:50,985 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:09:04,694 WARN L233 SmtUtils]: Spent 13.59s on a formula simplification that was a NOOP. DAG size: 1336 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:09:27,570 WARN L233 SmtUtils]: Spent 9.28s on a formula simplification. DAG size of input: 750 DAG size of output: 746 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:09:37,255 WARN L233 SmtUtils]: Spent 9.44s on a formula simplification. DAG size of input: 754 DAG size of output: 750 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:09:47,315 WARN L233 SmtUtils]: Spent 9.78s on a formula simplification. DAG size of input: 762 DAG size of output: 755 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:09:57,303 WARN L233 SmtUtils]: Spent 9.70s on a formula simplification. DAG size of input: 766 DAG size of output: 759 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:10:07,313 WARN L233 SmtUtils]: Spent 9.68s on a formula simplification. DAG size of input: 774 DAG size of output: 764 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:10:17,815 WARN L233 SmtUtils]: Spent 10.13s on a formula simplification. DAG size of input: 778 DAG size of output: 768 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:10:28,796 WARN L233 SmtUtils]: Spent 10.58s on a formula simplification. DAG size of input: 786 DAG size of output: 773 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:10:39,598 WARN L233 SmtUtils]: Spent 10.36s on a formula simplification. DAG size of input: 790 DAG size of output: 777 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:10:50,982 WARN L233 SmtUtils]: Spent 10.90s on a formula simplification. DAG size of input: 798 DAG size of output: 782 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:11:01,865 WARN L233 SmtUtils]: Spent 10.43s on a formula simplification. DAG size of input: 802 DAG size of output: 786 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:11:12,912 WARN L233 SmtUtils]: Spent 10.56s on a formula simplification. DAG size of input: 810 DAG size of output: 790 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:11:24,539 WARN L233 SmtUtils]: Spent 11.08s on a formula simplification. DAG size of input: 814 DAG size of output: 794 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:11:36,328 WARN L233 SmtUtils]: Spent 11.17s on a formula simplification. DAG size of input: 822 DAG size of output: 798 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:11:47,949 WARN L233 SmtUtils]: Spent 11.01s on a formula simplification. DAG size of input: 826 DAG size of output: 802 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:11:59,778 WARN L233 SmtUtils]: Spent 11.23s on a formula simplification. DAG size of input: 834 DAG size of output: 808 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:12:11,756 WARN L233 SmtUtils]: Spent 11.35s on a formula simplification. DAG size of input: 838 DAG size of output: 812 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:12:24,100 WARN L233 SmtUtils]: Spent 11.67s on a formula simplification. DAG size of input: 846 DAG size of output: 816 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:12:36,522 WARN L233 SmtUtils]: Spent 11.72s on a formula simplification. DAG size of input: 850 DAG size of output: 820 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:12:49,363 WARN L233 SmtUtils]: Spent 12.10s on a formula simplification. DAG size of input: 858 DAG size of output: 826 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:13:28,353 WARN L233 SmtUtils]: Spent 6.97s on a formula simplification. DAG size of input: 494 DAG size of output: 355 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:13:36,928 WARN L233 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 500 DAG size of output: 392 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:13:43,718 WARN L233 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 496 DAG size of output: 344 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:13:56,151 WARN L233 SmtUtils]: Spent 11.78s on a formula simplification. DAG size of input: 524 DAG size of output: 375 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:14:04,743 WARN L233 SmtUtils]: Spent 7.98s on a formula simplification. DAG size of input: 507 DAG size of output: 374 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:14:47,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1914725153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:14:47,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:14:47,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [4, 4, 4] total 70 [2022-11-23 14:14:47,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684726000] [2022-11-23 14:14:47,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:14:47,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-23 14:14:47,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:14:47,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-23 14:14:47,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=4460, Unknown=0, NotChecked=0, Total=4830 [2022-11-23 14:14:47,498 INFO L87 Difference]: Start difference. First operand 11022 states and 15079 transitions. Second operand has 65 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 44 states have internal predecessors, (79), 17 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 17 states have call predecessors, (24), 17 states have call successors, (24) [2022-11-23 14:15:17,507 WARN L233 SmtUtils]: Spent 29.39s on a formula simplification. DAG size of input: 1361 DAG size of output: 1341 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:15:50,238 WARN L233 SmtUtils]: Spent 32.30s on a formula simplification. DAG size of input: 1369 DAG size of output: 1349 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:16:24,155 WARN L233 SmtUtils]: Spent 32.93s on a formula simplification. DAG size of input: 1375 DAG size of output: 1355 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:16:40,757 WARN L233 SmtUtils]: Spent 15.75s on a formula simplification that was a NOOP. DAG size: 1340 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:16:56,843 WARN L233 SmtUtils]: Spent 15.37s on a formula simplification that was a NOOP. DAG size: 1344 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:17:12,809 WARN L233 SmtUtils]: Spent 15.16s on a formula simplification that was a NOOP. DAG size: 1348 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:17:29,128 WARN L233 SmtUtils]: Spent 15.57s on a formula simplification that was a NOOP. DAG size: 1352 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:17:46,309 WARN L233 SmtUtils]: Spent 16.23s on a formula simplification that was a NOOP. DAG size: 1357 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:18:02,671 WARN L233 SmtUtils]: Spent 15.59s on a formula simplification that was a NOOP. DAG size: 1361 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:18:20,587 WARN L233 SmtUtils]: Spent 16.37s on a formula simplification that was a NOOP. DAG size: 1366 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)