./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--serial--mos7840.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e871f-47d2-4ccc-a63b-96aa5ede0ec4/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e871f-47d2-4ccc-a63b-96aa5ede0ec4/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e871f-47d2-4ccc-a63b-96aa5ede0ec4/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e871f-47d2-4ccc-a63b-96aa5ede0ec4/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--serial--mos7840.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e871f-47d2-4ccc-a63b-96aa5ede0ec4/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e871f-47d2-4ccc-a63b-96aa5ede0ec4/bin/utaipan-6cKwYrpEi9 --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 c1586642bef6980141a60942369684a3359f9fff4af003e79a9c46b72c273d5b --- 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-6b4ec56 [2022-11-20 21:28:21,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:28:21,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:28:21,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:28:21,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:28:21,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:28:21,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:28:21,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:28:21,124 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:28:21,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:28:21,131 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:28:21,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:28:21,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:28:21,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:28:21,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:28:21,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:28:21,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:28:21,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:28:21,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:28:21,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:28:21,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:28:21,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:28:21,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:28:21,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:28:21,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:28:21,148 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:28:21,149 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:28:21,149 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:28:21,150 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:28:21,151 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:28:21,151 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:28:21,152 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:28:21,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:28:21,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:28:21,154 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:28:21,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:28:21,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:28:21,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:28:21,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:28:21,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:28:21,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:28:21,166 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e871f-47d2-4ccc-a63b-96aa5ede0ec4/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-20 21:28:21,199 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:28:21,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:28:21,199 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:28:21,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:28:21,200 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:28:21,200 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:28:21,201 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:28:21,201 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:28:21,201 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:28:21,201 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:28:21,202 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:28:21,202 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:28:21,202 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:28:21,202 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:28:21,202 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:28:21,203 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:28:21,203 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:28:21,203 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:28:21,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:28:21,204 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:28:21,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:28:21,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 21:28:21,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:28:21,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 21:28:21,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 21:28:21,205 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:28:21,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 21:28:21,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:28:21,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:28:21,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:28:21,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:28:21,206 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:28:21,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:28:21,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 21:28:21,207 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:28:21,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:28:21,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 21:28:21,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:28:21,208 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_1b7e871f-47d2-4ccc-a63b-96aa5ede0ec4/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e871f-47d2-4ccc-a63b-96aa5ede0ec4/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1586642bef6980141a60942369684a3359f9fff4af003e79a9c46b72c273d5b [2022-11-20 21:28:21,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:28:21,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:28:21,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:28:21,480 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:28:21,480 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:28:21,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e871f-47d2-4ccc-a63b-96aa5ede0ec4/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--serial--mos7840.ko-entry_point.cil.out.i [2022-11-20 21:28:24,499 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:28:25,078 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:28:25,079 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e871f-47d2-4ccc-a63b-96aa5ede0ec4/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--serial--mos7840.ko-entry_point.cil.out.i [2022-11-20 21:28:25,125 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e871f-47d2-4ccc-a63b-96aa5ede0ec4/bin/utaipan-6cKwYrpEi9/data/773e12d5a/0ba4c39c0fce426d8412ac226836abcc/FLAGe21db53d4 [2022-11-20 21:28:25,143 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e871f-47d2-4ccc-a63b-96aa5ede0ec4/bin/utaipan-6cKwYrpEi9/data/773e12d5a/0ba4c39c0fce426d8412ac226836abcc [2022-11-20 21:28:25,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:28:25,150 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:28:25,154 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:28:25,154 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:28:25,158 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:28:25,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:28:25" (1/1) ... [2022-11-20 21:28:25,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3288e72e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:25, skipping insertion in model container [2022-11-20 21:28:25,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:28:25" (1/1) ... [2022-11-20 21:28:25,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:28:25,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:28:27,062 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_1b7e871f-47d2-4ccc-a63b-96aa5ede0ec4/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--serial--mos7840.ko-entry_point.cil.out.i[297800,297813] [2022-11-20 21:28:27,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:28:27,137 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:28:27,547 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_1b7e871f-47d2-4ccc-a63b-96aa5ede0ec4/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--serial--mos7840.ko-entry_point.cil.out.i[297800,297813] [2022-11-20 21:28:27,552 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:28:27,625 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:28:27,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:27 WrapperNode [2022-11-20 21:28:27,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:28:27,627 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:28:27,627 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:28:27,627 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:28:27,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:27" (1/1) ... [2022-11-20 21:28:27,820 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:27" (1/1) ... [2022-11-20 21:28:28,048 INFO L138 Inliner]: procedures = 191, calls = 4706, calls flagged for inlining = 80, calls inlined = 67, statements flattened = 7774 [2022-11-20 21:28:28,049 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:28:28,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:28:28,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:28:28,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:28:28,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:27" (1/1) ... [2022-11-20 21:28:28,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:27" (1/1) ... [2022-11-20 21:28:28,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:27" (1/1) ... [2022-11-20 21:28:28,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:27" (1/1) ... [2022-11-20 21:28:28,419 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:27" (1/1) ... [2022-11-20 21:28:28,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:27" (1/1) ... [2022-11-20 21:28:28,502 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:27" (1/1) ... [2022-11-20 21:28:28,532 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:27" (1/1) ... [2022-11-20 21:28:28,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:28:28,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:28:28,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:28:28,574 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:28:28,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:27" (1/1) ... [2022-11-20 21:28:28,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:28:28,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e871f-47d2-4ccc-a63b-96aa5ede0ec4/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:28:28,609 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e871f-47d2-4ccc-a63b-96aa5ede0ec4/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:28:28,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e871f-47d2-4ccc-a63b-96aa5ede0ec4/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:28:28,665 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_port_probe [2022-11-20 21:28:28,665 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_port_probe [2022-11-20 21:28:28,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-20 21:28:28,666 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_get_reg_sync [2022-11-20 21:28:28,666 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_get_reg_sync [2022-11-20 21:28:28,666 INFO L130 BoogieDeclarations]: Found specification of procedure activate_pending_timer_1 [2022-11-20 21:28:28,666 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_pending_timer_1 [2022-11-20 21:28:28,666 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_set_reg_sync [2022-11-20 21:28:28,666 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_set_reg_sync [2022-11-20 21:28:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-20 21:28:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-20 21:28:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-20 21:28:28,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-20 21:28:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 21:28:28,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-20 21:28:28,668 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-20 21:28:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_write [2022-11-20 21:28:28,668 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_write [2022-11-20 21:28:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2022-11-20 21:28:28,668 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2022-11-20 21:28:28,668 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_ioctl [2022-11-20 21:28:28,668 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_ioctl [2022-11-20 21:28:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_tiocmiwait [2022-11-20 21:28:28,669 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_tiocmiwait [2022-11-20 21:28:28,669 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-11-20 21:28:28,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-11-20 21:28:28,670 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_control_urb [2022-11-20 21:28:28,670 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_control_urb [2022-11-20 21:28:28,671 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-20 21:28:28,671 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-20 21:28:28,671 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-20 21:28:28,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-20 21:28:28,671 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_get_port_private [2022-11-20 21:28:28,672 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_get_port_private [2022-11-20 21:28:28,672 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-20 21:28:28,672 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-20 21:28:28,673 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-11-20 21:28:28,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-11-20 21:28:28,673 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_1 [2022-11-20 21:28:28,673 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_1 [2022-11-20 21:28:28,673 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_get_uart_reg [2022-11-20 21:28:28,674 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_get_uart_reg [2022-11-20 21:28:28,674 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit_unlock [2022-11-20 21:28:28,674 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit_unlock [2022-11-20 21:28:28,674 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-20 21:28:28,674 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-20 21:28:28,674 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_port_data [2022-11-20 21:28:28,675 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_port_data [2022-11-20 21:28:28,675 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_get_usb_serial [2022-11-20 21:28:28,675 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_get_usb_serial [2022-11-20 21:28:28,676 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_get_icount [2022-11-20 21:28:28,676 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_get_icount [2022-11-20 21:28:28,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 21:28:28,676 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_set_led_async [2022-11-20 21:28:28,676 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_set_led_async [2022-11-20 21:28:28,676 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-20 21:28:28,676 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-20 21:28:28,677 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2022-11-20 21:28:28,677 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2022-11-20 21:28:28,677 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-20 21:28:28,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-20 21:28:28,677 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_set_termios [2022-11-20 21:28:28,678 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_set_termios [2022-11-20 21:28:28,678 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-20 21:28:28,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-20 21:28:28,678 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_set_led_sync [2022-11-20 21:28:28,678 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_set_led_sync [2022-11-20 21:28:28,678 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_detach_3 [2022-11-20 21:28:28,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_detach_3 [2022-11-20 21:28:28,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-20 21:28:28,679 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-20 21:28:28,679 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-20 21:28:28,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-20 21:28:28,679 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 21:28:28,679 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 21:28:28,680 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_chars_in_buffer [2022-11-20 21:28:28,680 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_chars_in_buffer [2022-11-20 21:28:28,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 21:28:28,681 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_1 [2022-11-20 21:28:28,681 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_1 [2022-11-20 21:28:28,681 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_throttle [2022-11-20 21:28:28,682 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_throttle [2022-11-20 21:28:28,682 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-20 21:28:28,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-20 21:28:28,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:28:28,682 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_2 [2022-11-20 21:28:28,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_2 [2022-11-20 21:28:28,683 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_1 [2022-11-20 21:28:28,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_1 [2022-11-20 21:28:28,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 21:28:28,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 21:28:28,684 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2022-11-20 21:28:28,684 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2022-11-20 21:28:28,684 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit_lock [2022-11-20 21:28:28,685 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit_lock [2022-11-20 21:28:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_set_uart_reg [2022-11-20 21:28:28,685 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_set_uart_reg [2022-11-20 21:28:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 21:28:28,685 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2022-11-20 21:28:28,685 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2022-11-20 21:28:28,686 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2022-11-20 21:28:28,686 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2022-11-20 21:28:28,686 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-11-20 21:28:28,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-11-20 21:28:28,686 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-20 21:28:28,686 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-20 21:28:28,686 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_port_paranoia_check [2022-11-20 21:28:28,687 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_port_paranoia_check [2022-11-20 21:28:28,687 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_serial_paranoia_check [2022-11-20 21:28:28,687 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_serial_paranoia_check [2022-11-20 21:28:28,688 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-20 21:28:28,691 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-20 21:28:28,691 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_led_activity [2022-11-20 21:28:28,691 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_led_activity [2022-11-20 21:28:28,692 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_bulk_in_callback [2022-11-20 21:28:28,692 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_bulk_in_callback [2022-11-20 21:28:28,693 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_write_room [2022-11-20 21:28:28,694 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_write_room [2022-11-20 21:28:28,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 21:28:28,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 21:28:28,700 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_calc_num_ports [2022-11-20 21:28:28,700 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_calc_num_ports [2022-11-20 21:28:28,700 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_break [2022-11-20 21:28:28,700 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_break [2022-11-20 21:28:28,700 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_tiocmset [2022-11-20 21:28:28,700 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_tiocmset [2022-11-20 21:28:28,701 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_tiocmget [2022-11-20 21:28:28,701 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_tiocmget [2022-11-20 21:28:28,701 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2022-11-20 21:28:28,701 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2022-11-20 21:28:28,701 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_set_port_private [2022-11-20 21:28:28,701 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_set_port_private [2022-11-20 21:28:28,701 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_unthrottle [2022-11-20 21:28:28,701 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_unthrottle [2022-11-20 21:28:28,701 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-20 21:28:28,701 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-20 21:28:28,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 21:28:28,702 INFO L130 BoogieDeclarations]: Found specification of procedure usb_clear_halt [2022-11-20 21:28:28,702 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_clear_halt [2022-11-20 21:28:28,702 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_data [2022-11-20 21:28:28,702 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_data [2022-11-20 21:28:28,702 INFO L130 BoogieDeclarations]: Found specification of procedure mos7840_port_remove [2022-11-20 21:28:28,702 INFO L138 BoogieDeclarations]: Found implementation of procedure mos7840_port_remove [2022-11-20 21:28:28,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-20 21:28:28,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:28:28,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:28:29,375 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:28:29,378 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:28:31,645 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-20 21:29:35,987 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:29:37,464 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:29:37,464 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 21:29:37,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:29:37 BoogieIcfgContainer [2022-11-20 21:29:37,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:29:37,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:29:37,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:29:37,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:29:37,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:28:25" (1/3) ... [2022-11-20 21:29:37,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f52fa93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:29:37, skipping insertion in model container [2022-11-20 21:29:37,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:28:27" (2/3) ... [2022-11-20 21:29:37,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f52fa93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:29:37, skipping insertion in model container [2022-11-20 21:29:37,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:29:37" (3/3) ... [2022-11-20 21:29:37,479 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--usb--serial--mos7840.ko-entry_point.cil.out.i [2022-11-20 21:29:37,501 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:29:37,501 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 21:29:37,593 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:29:37,599 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;@21a7c1c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:29:37,599 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 21:29:37,608 INFO L276 IsEmpty]: Start isEmpty. Operand has 1336 states, 835 states have (on average 1.3425149700598802) internal successors, (1121), 858 states have internal predecessors, (1121), 435 states have call successors, (435), 65 states have call predecessors, (435), 64 states have return successors, (430), 424 states have call predecessors, (430), 430 states have call successors, (430) [2022-11-20 21:29:37,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-20 21:29:37,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:29:37,624 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:29:37,625 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:29:37,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:29:37,630 INFO L85 PathProgramCache]: Analyzing trace with hash -813960816, now seen corresponding path program 1 times [2022-11-20 21:29:37,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:29:37,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368328877] [2022-11-20 21:29:37,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:29:37,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:29:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:29:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-20 21:29:39,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:29:39,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368328877] [2022-11-20 21:29:39,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368328877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:29:39,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:29:39,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:29:39,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797797978] [2022-11-20 21:29:39,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:29:39,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:29:39,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:29:39,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:29:39,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:29:39,088 INFO L87 Difference]: Start difference. First operand has 1336 states, 835 states have (on average 1.3425149700598802) internal successors, (1121), 858 states have internal predecessors, (1121), 435 states have call successors, (435), 65 states have call predecessors, (435), 64 states have return successors, (430), 424 states have call predecessors, (430), 430 states have call successors, (430) 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, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-20 21:29:41,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:29:44,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:29:46,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:29:47,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 21:29:49,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 21:29:50,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:29:50,375 INFO L93 Difference]: Finished difference Result 2748 states and 4158 transitions. [2022-11-20 21:29:50,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:29:50,378 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, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 127 [2022-11-20 21:29:50,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:29:50,401 INFO L225 Difference]: With dead ends: 2748 [2022-11-20 21:29:50,401 INFO L226 Difference]: Without dead ends: 1424 [2022-11-20 21:29:50,423 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 [2022-11-20 21:29:50,425 INFO L413 NwaCegarLoop]: 1787 mSDtfsCounter, 141 mSDsluCounter, 1569 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 3356 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:29:50,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 3356 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 625 Invalid, 1 Unknown, 0 Unchecked, 11.0s Time] [2022-11-20 21:29:50,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2022-11-20 21:29:50,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1421. [2022-11-20 21:29:50,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 899 states have (on average 1.3448275862068966) internal successors, (1209), 924 states have internal predecessors, (1209), 447 states have call successors, (447), 75 states have call predecessors, (447), 74 states have return successors, (446), 434 states have call predecessors, (446), 446 states have call successors, (446) [2022-11-20 21:29:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 2102 transitions. [2022-11-20 21:29:50,589 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 2102 transitions. Word has length 127 [2022-11-20 21:29:50,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:29:50,592 INFO L495 AbstractCegarLoop]: Abstraction has 1421 states and 2102 transitions. [2022-11-20 21:29:50,593 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, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-20 21:29:50,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 2102 transitions. [2022-11-20 21:29:50,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-20 21:29:50,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:29:50,606 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:29:50,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 21:29:50,607 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:29:50,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:29:50,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1053572198, now seen corresponding path program 1 times [2022-11-20 21:29:50,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:29:50,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736367006] [2022-11-20 21:29:50,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:29:50,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:29:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:29:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-20 21:29:51,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:29:51,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736367006] [2022-11-20 21:29:51,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736367006] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:29:51,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:29:51,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:29:51,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539934155] [2022-11-20 21:29:51,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:29:51,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:29:51,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:29:51,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:29:51,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:29:51,854 INFO L87 Difference]: Start difference. First operand 1421 states and 2102 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-20 21:29:53,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:29:58,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:30:00,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:30:02,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:30:06,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:07,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:08,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:10,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:30:10,903 INFO L93 Difference]: Finished difference Result 5595 states and 8352 transitions. [2022-11-20 21:30:10,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:30:10,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 134 [2022-11-20 21:30:10,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:30:10,932 INFO L225 Difference]: With dead ends: 5595 [2022-11-20 21:30:10,932 INFO L226 Difference]: Without dead ends: 4201 [2022-11-20 21:30:10,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:30:10,943 INFO L413 NwaCegarLoop]: 2628 mSDtfsCounter, 4920 mSDsluCounter, 2702 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 832 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4920 SdHoareTripleChecker+Valid, 5330 SdHoareTripleChecker+Invalid, 2305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 832 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:30:10,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4920 Valid, 5330 Invalid, 2305 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [832 Valid, 1471 Invalid, 2 Unknown, 0 Unchecked, 18.6s Time] [2022-11-20 21:30:10,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2022-11-20 21:30:11,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4185. [2022-11-20 21:30:11,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4185 states, 2663 states have (on average 1.3469770935035674) internal successors, (3587), 2728 states have internal predecessors, (3587), 1305 states have call successors, (1305), 217 states have call predecessors, (1305), 216 states have return successors, (1370), 1272 states have call predecessors, (1370), 1304 states have call successors, (1370) [2022-11-20 21:30:11,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4185 states to 4185 states and 6262 transitions. [2022-11-20 21:30:11,332 INFO L78 Accepts]: Start accepts. Automaton has 4185 states and 6262 transitions. Word has length 134 [2022-11-20 21:30:11,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:30:11,334 INFO L495 AbstractCegarLoop]: Abstraction has 4185 states and 6262 transitions. [2022-11-20 21:30:11,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-20 21:30:11,334 INFO L276 IsEmpty]: Start isEmpty. Operand 4185 states and 6262 transitions. [2022-11-20 21:30:11,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-20 21:30:11,341 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:30:11,342 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:30:11,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 21:30:11,342 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:30:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:30:11,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1964261639, now seen corresponding path program 1 times [2022-11-20 21:30:11,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:30:11,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853105243] [2022-11-20 21:30:11,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:30:11,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:30:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:30:12,433 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-20 21:30:12,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:30:12,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853105243] [2022-11-20 21:30:12,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853105243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:30:12,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:30:12,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:30:12,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599978974] [2022-11-20 21:30:12,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:30:12,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:30:12,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:30:12,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:30:12,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:30:12,438 INFO L87 Difference]: Start difference. First operand 4185 states and 6262 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-20 21:30:14,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:30:20,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:30:23,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:25,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:26,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:28,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:31,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:30:31,862 INFO L93 Difference]: Finished difference Result 15738 states and 23792 transitions. [2022-11-20 21:30:31,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:30:31,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 135 [2022-11-20 21:30:31,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:30:31,935 INFO L225 Difference]: With dead ends: 15738 [2022-11-20 21:30:31,935 INFO L226 Difference]: Without dead ends: 11580 [2022-11-20 21:30:31,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:30:31,962 INFO L413 NwaCegarLoop]: 2594 mSDtfsCounter, 3377 mSDsluCounter, 4352 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3381 SdHoareTripleChecker+Valid, 6946 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:30:31,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3381 Valid, 6946 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1539 Invalid, 3 Unknown, 0 Unchecked, 18.9s Time] [2022-11-20 21:30:31,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11580 states. [2022-11-20 21:30:32,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11580 to 11557. [2022-11-20 21:30:32,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11557 states, 7433 states have (on average 1.3558455536122695) internal successors, (10078), 7613 states have internal predecessors, (10078), 3487 states have call successors, (3487), 637 states have call predecessors, (3487), 636 states have return successors, (3962), 3393 states have call predecessors, (3962), 3486 states have call successors, (3962) [2022-11-20 21:30:32,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11557 states to 11557 states and 17527 transitions. [2022-11-20 21:30:32,728 INFO L78 Accepts]: Start accepts. Automaton has 11557 states and 17527 transitions. Word has length 135 [2022-11-20 21:30:32,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:30:32,729 INFO L495 AbstractCegarLoop]: Abstraction has 11557 states and 17527 transitions. [2022-11-20 21:30:32,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-20 21:30:32,730 INFO L276 IsEmpty]: Start isEmpty. Operand 11557 states and 17527 transitions. [2022-11-20 21:30:32,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-20 21:30:32,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:30:32,732 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:30:32,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 21:30:32,732 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:30:32,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:30:32,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1941306766, now seen corresponding path program 1 times [2022-11-20 21:30:32,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:30:32,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335556151] [2022-11-20 21:30:32,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:30:32,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:30:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:30:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-20 21:30:33,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:30:33,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335556151] [2022-11-20 21:30:33,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335556151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:30:33,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:30:33,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:30:33,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51817249] [2022-11-20 21:30:33,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:30:33,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:30:33,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:30:33,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:30:33,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:30:33,614 INFO L87 Difference]: Start difference. First operand 11557 states and 17527 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-20 21:30:35,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:30:43,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:30:48,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:49,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 21:30:52,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:30:52,819 INFO L93 Difference]: Finished difference Result 46107 states and 70516 transitions. [2022-11-20 21:30:52,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:30:52,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 136 [2022-11-20 21:30:52,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:30:53,040 INFO L225 Difference]: With dead ends: 46107 [2022-11-20 21:30:53,040 INFO L226 Difference]: Without dead ends: 34577 [2022-11-20 21:30:53,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:30:53,122 INFO L413 NwaCegarLoop]: 2815 mSDtfsCounter, 4765 mSDsluCounter, 2702 mSDsCounter, 0 mSdLazyCounter, 1518 mSolverCounterSat, 737 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4765 SdHoareTripleChecker+Valid, 5517 SdHoareTripleChecker+Invalid, 2257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 737 IncrementalHoareTripleChecker+Valid, 1518 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:30:53,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4765 Valid, 5517 Invalid, 2257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [737 Valid, 1518 Invalid, 2 Unknown, 0 Unchecked, 18.0s Time] [2022-11-20 21:30:53,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34577 states. [2022-11-20 21:30:55,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34577 to 34561. [2022-11-20 21:30:55,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34561 states, 22265 states have (on average 1.354412755445767) internal successors, (30156), 22763 states have internal predecessors, (30156), 10393 states have call successors, (10393), 1903 states have call predecessors, (10393), 1902 states have return successors, (12414), 10149 states have call predecessors, (12414), 10392 states have call successors, (12414) [2022-11-20 21:30:56,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34561 states to 34561 states and 52963 transitions. [2022-11-20 21:30:56,102 INFO L78 Accepts]: Start accepts. Automaton has 34561 states and 52963 transitions. Word has length 136 [2022-11-20 21:30:56,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:30:56,103 INFO L495 AbstractCegarLoop]: Abstraction has 34561 states and 52963 transitions. [2022-11-20 21:30:56,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-20 21:30:56,103 INFO L276 IsEmpty]: Start isEmpty. Operand 34561 states and 52963 transitions. [2022-11-20 21:30:56,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-20 21:30:56,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:30:56,105 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:30:56,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 21:30:56,106 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:30:56,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:30:56,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1429012577, now seen corresponding path program 1 times [2022-11-20 21:30:56,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:30:56,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146534148] [2022-11-20 21:30:56,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:30:56,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:30:56,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:30:57,070 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-11-20 21:30:57,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:30:57,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146534148] [2022-11-20 21:30:57,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146534148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:30:57,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:30:57,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:30:57,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426530708] [2022-11-20 21:30:57,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:30:57,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:30:57,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:30:57,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:30:57,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:30:57,073 INFO L87 Difference]: Start difference. First operand 34561 states and 52963 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-20 21:30:59,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:31:01,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:31:05,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:31:07,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:31:10,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:31:15,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 21:31:19,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:31:19,434 INFO L93 Difference]: Finished difference Result 135203 states and 208626 transitions. [2022-11-20 21:31:19,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:31:19,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 137 [2022-11-20 21:31:19,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:31:20,248 INFO L225 Difference]: With dead ends: 135203 [2022-11-20 21:31:20,248 INFO L226 Difference]: Without dead ends: 100669 [2022-11-20 21:31:20,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:31:20,416 INFO L413 NwaCegarLoop]: 2520 mSDtfsCounter, 3554 mSDsluCounter, 4268 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 6 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3562 SdHoareTripleChecker+Valid, 6788 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:31:20,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3562 Valid, 6788 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1511 Invalid, 4 Unknown, 0 Unchecked, 18.8s Time] [2022-11-20 21:31:20,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100669 states. [2022-11-20 21:31:26,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100669 to 100517. [2022-11-20 21:31:26,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100517 states, 65013 states have (on average 1.3555596572993094) internal successors, (88129), 66429 states have internal predecessors, (88129), 29972 states have call successors, (29972), 5548 states have call predecessors, (29972), 5531 states have return successors, (37229), 29257 states have call predecessors, (37229), 29971 states have call successors, (37229) [2022-11-20 21:31:27,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100517 states to 100517 states and 155330 transitions. [2022-11-20 21:31:27,766 INFO L78 Accepts]: Start accepts. Automaton has 100517 states and 155330 transitions. Word has length 137 [2022-11-20 21:31:27,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:31:27,784 INFO L495 AbstractCegarLoop]: Abstraction has 100517 states and 155330 transitions. [2022-11-20 21:31:27,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-20 21:31:27,784 INFO L276 IsEmpty]: Start isEmpty. Operand 100517 states and 155330 transitions. [2022-11-20 21:31:27,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-11-20 21:31:27,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:31:27,787 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 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] [2022-11-20 21:31:27,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 21:31:27,788 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:31:27,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:31:27,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1261819960, now seen corresponding path program 1 times [2022-11-20 21:31:27,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:31:27,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796548230] [2022-11-20 21:31:27,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:27,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:31:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:31:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2022-11-20 21:31:28,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:31:28,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796548230] [2022-11-20 21:31:28,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796548230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:31:28,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:31:28,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:31:28,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696943978] [2022-11-20 21:31:28,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:31:28,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:31:28,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:31:28,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:31:28,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:31:28,440 INFO L87 Difference]: Start difference. First operand 100517 states and 155330 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-20 21:31:30,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:31:33,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:31:38,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 21:31:39,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:31:39,912 INFO L93 Difference]: Finished difference Result 101890 states and 156764 transitions. [2022-11-20 21:31:39,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:31:39,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 184 [2022-11-20 21:31:39,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:31:40,480 INFO L225 Difference]: With dead ends: 101890 [2022-11-20 21:31:40,480 INFO L226 Difference]: Without dead ends: 101887 [2022-11-20 21:31:40,541 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 [2022-11-20 21:31:40,542 INFO L413 NwaCegarLoop]: 1792 mSDtfsCounter, 1676 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1680 SdHoareTripleChecker+Valid, 2050 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:31:40,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1680 Valid, 2050 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 269 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2022-11-20 21:31:40,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101887 states. [2022-11-20 21:31:45,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101887 to 101887. [2022-11-20 21:31:45,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101887 states, 65743 states have (on average 1.350212189890939) internal successors, (88767), 67177 states have internal predecessors, (88767), 30260 states have call successors, (30260), 5882 states have call predecessors, (30260), 5883 states have return successors, (37589), 29545 states have call predecessors, (37589), 30259 states have call successors, (37589) [2022-11-20 21:31:46,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101887 states to 101887 states and 156616 transitions. [2022-11-20 21:31:46,167 INFO L78 Accepts]: Start accepts. Automaton has 101887 states and 156616 transitions. Word has length 184 [2022-11-20 21:31:46,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:31:46,169 INFO L495 AbstractCegarLoop]: Abstraction has 101887 states and 156616 transitions. [2022-11-20 21:31:46,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-20 21:31:46,169 INFO L276 IsEmpty]: Start isEmpty. Operand 101887 states and 156616 transitions. [2022-11-20 21:31:46,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-20 21:31:46,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:31:46,181 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 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] [2022-11-20 21:31:46,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 21:31:46,181 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:31:46,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:31:46,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1611545803, now seen corresponding path program 1 times [2022-11-20 21:31:46,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:31:46,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015419882] [2022-11-20 21:31:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:31:46,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:31:47,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:31:47,664 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2022-11-20 21:31:47,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:31:47,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015419882] [2022-11-20 21:31:47,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015419882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:31:47,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:31:47,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:31:47,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94823854] [2022-11-20 21:31:47,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:31:47,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:31:47,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:31:47,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:31:47,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:31:47,668 INFO L87 Difference]: Start difference. First operand 101887 states and 156616 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-20 21:31:49,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:31:51,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:31:57,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-20 21:31:58,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:31:58,682 INFO L93 Difference]: Finished difference Result 103363 states and 158434 transitions. [2022-11-20 21:31:58,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:31:58,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 243 [2022-11-20 21:31:58,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:31:58,695 INFO L225 Difference]: With dead ends: 103363 [2022-11-20 21:31:58,695 INFO L226 Difference]: Without dead ends: 0 [2022-11-20 21:31:59,247 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 [2022-11-20 21:31:59,248 INFO L413 NwaCegarLoop]: 1776 mSDtfsCounter, 1828 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1832 SdHoareTripleChecker+Valid, 1903 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:31:59,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1832 Valid, 1903 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 238 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2022-11-20 21:31:59,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-20 21:31:59,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-20 21:31:59,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:31:59,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-20 21:31:59,265 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 243 [2022-11-20 21:31:59,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:31:59,265 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-20 21:31:59,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (35), 3 states have call predecessors, (35), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-20 21:31:59,266 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-20 21:31:59,266 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-20 21:31:59,268 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 21:31:59,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 21:31:59,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.