./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-32_7a-drivers--hwmon--abituguru3.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru3.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0 --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 32c3d0de0693c88d7932ff8b6e02d1235a8aa90cfbd4ebc203b8adf917998be1 --- 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-e04fb08 [2022-11-16 20:21:40,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:21:40,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:21:40,227 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:21:40,227 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:21:40,228 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:21:40,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:21:40,233 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:21:40,235 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:21:40,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:21:40,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:21:40,239 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:21:40,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:21:40,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:21:40,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:21:40,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:21:40,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:21:40,247 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:21:40,249 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:21:40,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:21:40,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:21:40,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:21:40,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:21:40,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:21:40,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:21:40,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:21:40,263 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:21:40,264 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:21:40,265 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:21:40,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:21:40,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:21:40,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:21:40,269 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:21:40,270 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:21:40,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:21:40,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:21:40,273 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:21:40,274 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:21:40,274 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:21:40,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:21:40,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:21:40,278 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-16 20:21:40,306 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:21:40,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:21:40,307 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:21:40,307 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:21:40,308 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:21:40,309 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:21:40,309 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:21:40,309 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:21:40,310 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:21:40,310 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:21:40,310 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:21:40,311 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:21:40,311 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:21:40,311 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:21:40,312 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:21:40,312 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:21:40,312 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:21:40,313 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:21:40,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:21:40,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:21:40,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:21:40,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:21:40,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:21:40,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:21:40,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:21:40,316 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:21:40,316 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:21:40,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:21:40,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:21:40,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:21:40,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:21:40,318 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:21:40,318 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:21:40,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:21:40,319 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:21:40,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:21:40,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:21:40,320 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:21:40,320 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_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 32c3d0de0693c88d7932ff8b6e02d1235a8aa90cfbd4ebc203b8adf917998be1 [2022-11-16 20:21:40,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:21:40,694 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:21:40,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:21:40,700 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:21:40,702 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:21:40,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru3.ko-entry_point.cil.out.i [2022-11-16 20:21:40,796 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/data/1f2fe1a1c/684f6f5b390d4904badba792e43917f0/FLAGa4755315c [2022-11-16 20:21:41,642 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:21:41,646 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru3.ko-entry_point.cil.out.i [2022-11-16 20:21:41,701 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/data/1f2fe1a1c/684f6f5b390d4904badba792e43917f0/FLAGa4755315c [2022-11-16 20:21:42,173 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/data/1f2fe1a1c/684f6f5b390d4904badba792e43917f0 [2022-11-16 20:21:42,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:21:42,182 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:21:42,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:21:42,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:21:42,190 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:21:42,191 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:21:42" (1/1) ... [2022-11-16 20:21:42,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c00c614 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:21:42, skipping insertion in model container [2022-11-16 20:21:42,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:21:42" (1/1) ... [2022-11-16 20:21:42,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:21:42,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:21:43,635 WARN L229 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_41f0b60d-5096-42be-a4e3-774d5a53b748/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru3.ko-entry_point.cil.out.i[192198,192211] [2022-11-16 20:21:43,764 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:21:43,902 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:21:44,363 WARN L229 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_41f0b60d-5096-42be-a4e3-774d5a53b748/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru3.ko-entry_point.cil.out.i[192198,192211] [2022-11-16 20:21:44,405 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:21:44,671 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:21:44,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:21:44 WrapperNode [2022-11-16 20:21:44,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:21:44,673 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:21:44,673 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:21:44,674 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:21:44,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:21:44" (1/1) ... [2022-11-16 20:21:44,821 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:21:44" (1/1) ... [2022-11-16 20:21:45,133 INFO L138 Inliner]: procedures = 165, calls = 5857, calls flagged for inlining = 57, calls inlined = 52, statements flattened = 6994 [2022-11-16 20:21:45,133 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:21:45,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:21:45,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:21:45,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:21:45,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:21:44" (1/1) ... [2022-11-16 20:21:45,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:21:44" (1/1) ... [2022-11-16 20:21:45,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:21:44" (1/1) ... [2022-11-16 20:21:45,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:21:44" (1/1) ... [2022-11-16 20:21:45,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:21:44" (1/1) ... [2022-11-16 20:21:45,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:21:44" (1/1) ... [2022-11-16 20:21:45,530 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:21:44" (1/1) ... [2022-11-16 20:21:45,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:21:44" (1/1) ... [2022-11-16 20:21:45,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:21:45,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:21:45,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:21:45,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:21:45,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:21:44" (1/1) ... [2022-11-16 20:21:45,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:21:45,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:21:45,645 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:21:45,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:21:45,710 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_wait_while_busy [2022-11-16 20:21:45,711 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_wait_while_busy [2022-11-16 20:21:45,711 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2022-11-16 20:21:45,711 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2022-11-16 20:21:45,711 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_wait_for_read [2022-11-16 20:21:45,712 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_wait_for_read [2022-11-16 20:21:45,712 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2022-11-16 20:21:45,712 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2022-11-16 20:21:45,712 INFO L130 BoogieDeclarations]: Found specification of procedure platform_driver_unregister [2022-11-16 20:21:45,713 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_driver_unregister [2022-11-16 20:21:45,713 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_remove [2022-11-16 20:21:45,713 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_remove [2022-11-16 20:21:45,713 INFO L130 BoogieDeclarations]: Found specification of procedure dmi_get_system_info [2022-11-16 20:21:45,713 INFO L138 BoogieDeclarations]: Found implementation of procedure dmi_get_system_info [2022-11-16 20:21:45,714 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-16 20:21:45,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-16 20:21:45,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 20:21:45,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-16 20:21:45,714 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-16 20:21:45,715 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_read [2022-11-16 20:21:45,715 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_read [2022-11-16 20:21:45,715 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-16 20:21:45,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-16 20:21:45,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 20:21:45,716 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-16 20:21:45,716 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-16 20:21:45,716 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-16 20:21:45,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-16 20:21:45,716 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_probe [2022-11-16 20:21:45,717 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_probe [2022-11-16 20:21:45,717 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2022-11-16 20:21:45,717 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2022-11-16 20:21:45,717 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_update_lock_of_abituguru3_data [2022-11-16 20:21:45,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_update_lock_of_abituguru3_data [2022-11-16 20:21:45,718 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-16 20:21:45,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-16 20:21:45,718 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_suspend [2022-11-16 20:21:45,718 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_suspend [2022-11-16 20:21:45,718 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-16 20:21:45,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-16 20:21:45,719 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 20:21:45,719 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 20:21:45,719 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_read_increment_offset [2022-11-16 20:21:45,719 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_read_increment_offset [2022-11-16 20:21:45,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 20:21:45,720 INFO L130 BoogieDeclarations]: Found specification of procedure inb_p [2022-11-16 20:21:45,720 INFO L138 BoogieDeclarations]: Found implementation of procedure inb_p [2022-11-16 20:21:45,721 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-16 20:21:45,722 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-16 20:21:45,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:21:45,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 20:21:45,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 20:21:45,724 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_update_device [2022-11-16 20:21:45,724 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_update_device [2022-11-16 20:21:45,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 20:21:45,725 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-11-16 20:21:45,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-11-16 20:21:45,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 20:21:45,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 20:21:45,726 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_update_lock_of_abituguru3_data [2022-11-16 20:21:45,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_update_lock_of_abituguru3_data [2022-11-16 20:21:45,727 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2022-11-16 20:21:45,727 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2022-11-16 20:21:45,727 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2022-11-16 20:21:45,727 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2022-11-16 20:21:45,727 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2022-11-16 20:21:45,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:21:45,728 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2022-11-16 20:21:45,728 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2022-11-16 20:21:45,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:21:45,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:21:45,729 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru3_resume [2022-11-16 20:21:45,731 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru3_resume [2022-11-16 20:21:45,731 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-16 20:21:45,731 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-16 20:21:46,328 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:21:46,331 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:21:49,381 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-16 20:22:03,853 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:22:05,319 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:22:05,320 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-16 20:22:05,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:22:05 BoogieIcfgContainer [2022-11-16 20:22:05,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:22:05,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:22:05,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:22:05,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:22:05,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:21:42" (1/3) ... [2022-11-16 20:22:05,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ccad3a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:22:05, skipping insertion in model container [2022-11-16 20:22:05,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:21:44" (2/3) ... [2022-11-16 20:22:05,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ccad3a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:22:05, skipping insertion in model container [2022-11-16 20:22:05,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:22:05" (3/3) ... [2022-11-16 20:22:05,336 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru3.ko-entry_point.cil.out.i [2022-11-16 20:22:05,360 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:22:05,361 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:22:05,476 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:22:05,485 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;@45b55dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:22:05,485 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:22:05,493 INFO L276 IsEmpty]: Start isEmpty. Operand has 428 states, 295 states have (on average 1.4440677966101696) internal successors, (426), 308 states have internal predecessors, (426), 101 states have call successors, (101), 31 states have call predecessors, (101), 30 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-11-16 20:22:05,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 20:22:05,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:05,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:22:05,507 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:05,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:05,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1071112479, now seen corresponding path program 1 times [2022-11-16 20:22:05,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:05,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678391256] [2022-11-16 20:22:05,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:05,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:22:08,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:08,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678391256] [2022-11-16 20:22:08,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678391256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:22:08,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:22:08,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:22:08,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801708354] [2022-11-16 20:22:08,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:22:08,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:22:08,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:22:08,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:22:08,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:22:08,115 INFO L87 Difference]: Start difference. First operand has 428 states, 295 states have (on average 1.4440677966101696) internal successors, (426), 308 states have internal predecessors, (426), 101 states have call successors, (101), 31 states have call predecessors, (101), 30 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 20:22:11,265 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 [] [2022-11-16 20:22:11,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:22:11,370 INFO L93 Difference]: Finished difference Result 1216 states and 1797 transitions. [2022-11-16 20:22:11,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:22:11,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-16 20:22:11,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:22:11,396 INFO L225 Difference]: With dead ends: 1216 [2022-11-16 20:22:11,397 INFO L226 Difference]: Without dead ends: 777 [2022-11-16 20:22:11,406 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 [2022-11-16 20:22:11,410 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 589 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:22:11,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [590 Valid, 1070 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2022-11-16 20:22:11,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-11-16 20:22:11,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 773. [2022-11-16 20:22:11,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 537 states have (on average 1.4208566108007448) internal successors, (763), 547 states have internal predecessors, (763), 178 states have call successors, (178), 58 states have call predecessors, (178), 57 states have return successors, (174), 173 states have call predecessors, (174), 173 states have call successors, (174) [2022-11-16 20:22:11,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1115 transitions. [2022-11-16 20:22:11,544 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1115 transitions. Word has length 15 [2022-11-16 20:22:11,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:22:11,545 INFO L495 AbstractCegarLoop]: Abstraction has 773 states and 1115 transitions. [2022-11-16 20:22:11,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 20:22:11,546 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1115 transitions. [2022-11-16 20:22:11,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 20:22:11,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:11,549 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:22:11,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:22:11,550 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:11,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:11,551 INFO L85 PathProgramCache]: Analyzing trace with hash 916121517, now seen corresponding path program 1 times [2022-11-16 20:22:11,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:11,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487133790] [2022-11-16 20:22:11,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:11,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:22:12,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:12,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487133790] [2022-11-16 20:22:12,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487133790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:22:12,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:22:12,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:22:12,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056919375] [2022-11-16 20:22:12,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:22:12,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:22:12,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:22:12,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:22:12,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:22:12,960 INFO L87 Difference]: Start difference. First operand 773 states and 1115 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 20:22:15,621 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 [] [2022-11-16 20:22:15,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:22:15,869 INFO L93 Difference]: Finished difference Result 2199 states and 3153 transitions. [2022-11-16 20:22:15,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:22:15,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-11-16 20:22:15,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:22:15,882 INFO L225 Difference]: With dead ends: 2199 [2022-11-16 20:22:15,883 INFO L226 Difference]: Without dead ends: 1427 [2022-11-16 20:22:15,887 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 [2022-11-16 20:22:15,889 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 506 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-16 20:22:15,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 1121 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 194 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-11-16 20:22:15,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2022-11-16 20:22:16,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1412. [2022-11-16 20:22:16,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 981 states have (on average 1.4036697247706422) internal successors, (1377), 997 states have internal predecessors, (1377), 323 states have call successors, (323), 108 states have call predecessors, (323), 107 states have return successors, (321), 318 states have call predecessors, (321), 318 states have call successors, (321) [2022-11-16 20:22:16,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2021 transitions. [2022-11-16 20:22:16,065 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2021 transitions. Word has length 20 [2022-11-16 20:22:16,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:22:16,066 INFO L495 AbstractCegarLoop]: Abstraction has 1412 states and 2021 transitions. [2022-11-16 20:22:16,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 20:22:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2021 transitions. [2022-11-16 20:22:16,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 20:22:16,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:16,076 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:22:16,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 20:22:16,077 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:16,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:16,089 INFO L85 PathProgramCache]: Analyzing trace with hash -384393476, now seen corresponding path program 1 times [2022-11-16 20:22:16,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:16,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813484037] [2022-11-16 20:22:16,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:16,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:17,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:22:17,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:17,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813484037] [2022-11-16 20:22:17,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813484037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:22:17,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:22:17,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:22:17,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886814602] [2022-11-16 20:22:17,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:22:17,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:22:17,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:22:17,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:22:17,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:22:17,552 INFO L87 Difference]: Start difference. First operand 1412 states and 2021 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:22:20,164 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 [] [2022-11-16 20:22:20,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:22:20,334 INFO L93 Difference]: Finished difference Result 1463 states and 2087 transitions. [2022-11-16 20:22:20,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:22:20,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-11-16 20:22:20,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:22:20,346 INFO L225 Difference]: With dead ends: 1463 [2022-11-16 20:22:20,347 INFO L226 Difference]: Without dead ends: 1460 [2022-11-16 20:22:20,349 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 [2022-11-16 20:22:20,350 INFO L413 NwaCegarLoop]: 531 mSDtfsCounter, 588 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:22:20,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 587 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2022-11-16 20:22:20,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2022-11-16 20:22:20,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1460. [2022-11-16 20:22:20,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1013 states have (on average 1.40177690029615) internal successors, (1420), 1029 states have internal predecessors, (1420), 332 states have call successors, (332), 114 states have call predecessors, (332), 114 states have return successors, (332), 328 states have call predecessors, (332), 328 states have call successors, (332) [2022-11-16 20:22:20,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2084 transitions. [2022-11-16 20:22:20,453 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2084 transitions. Word has length 27 [2022-11-16 20:22:20,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:22:20,454 INFO L495 AbstractCegarLoop]: Abstraction has 1460 states and 2084 transitions. [2022-11-16 20:22:20,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:22:20,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2084 transitions. [2022-11-16 20:22:20,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 20:22:20,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:20,456 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:22:20,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 20:22:20,457 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:20,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:20,457 INFO L85 PathProgramCache]: Analyzing trace with hash 968632710, now seen corresponding path program 1 times [2022-11-16 20:22:20,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:20,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050403066] [2022-11-16 20:22:20,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:20,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:21,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:22:21,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:21,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050403066] [2022-11-16 20:22:21,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050403066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:22:21,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:22:21,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:22:21,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637598458] [2022-11-16 20:22:21,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:22:21,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:22:21,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:22:21,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:22:21,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:22:21,751 INFO L87 Difference]: Start difference. First operand 1460 states and 2084 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:22:24,326 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 [] [2022-11-16 20:22:24,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:22:24,497 INFO L93 Difference]: Finished difference Result 1462 states and 2085 transitions. [2022-11-16 20:22:24,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:22:24,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-16 20:22:24,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:22:24,509 INFO L225 Difference]: With dead ends: 1462 [2022-11-16 20:22:24,510 INFO L226 Difference]: Without dead ends: 1459 [2022-11-16 20:22:24,515 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 [2022-11-16 20:22:24,518 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 585 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:22:24,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 585 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-16 20:22:24,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2022-11-16 20:22:24,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1459. [2022-11-16 20:22:24,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1013 states have (on average 1.4007897334649555) internal successors, (1419), 1028 states have internal predecessors, (1419), 331 states have call successors, (331), 114 states have call predecessors, (331), 114 states have return successors, (332), 328 states have call predecessors, (332), 328 states have call successors, (332) [2022-11-16 20:22:24,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 2082 transitions. [2022-11-16 20:22:24,643 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 2082 transitions. Word has length 28 [2022-11-16 20:22:24,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:22:24,644 INFO L495 AbstractCegarLoop]: Abstraction has 1459 states and 2082 transitions. [2022-11-16 20:22:24,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:22:24,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 2082 transitions. [2022-11-16 20:22:24,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 20:22:24,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:24,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:22:24,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 20:22:24,648 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:24,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:24,648 INFO L85 PathProgramCache]: Analyzing trace with hash -37223617, now seen corresponding path program 1 times [2022-11-16 20:22:24,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:24,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058267549] [2022-11-16 20:22:24,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:24,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:22:25,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:25,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058267549] [2022-11-16 20:22:25,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058267549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:22:25,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:22:25,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:22:25,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91637342] [2022-11-16 20:22:25,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:22:25,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:22:25,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:22:25,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:22:25,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:22:25,761 INFO L87 Difference]: Start difference. First operand 1459 states and 2082 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:22:28,339 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 [] [2022-11-16 20:22:28,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:22:28,747 INFO L93 Difference]: Finished difference Result 4024 states and 5764 transitions. [2022-11-16 20:22:28,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:22:28,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-11-16 20:22:28,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:22:28,767 INFO L225 Difference]: With dead ends: 4024 [2022-11-16 20:22:28,767 INFO L226 Difference]: Without dead ends: 2558 [2022-11-16 20:22:28,776 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 [2022-11-16 20:22:28,777 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 522 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-16 20:22:28,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 1093 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 171 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-11-16 20:22:28,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2022-11-16 20:22:29,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 2551. [2022-11-16 20:22:29,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2551 states, 1771 states have (on average 1.3929983060417843) internal successors, (2467), 1809 states have internal predecessors, (2467), 591 states have call successors, (591), 201 states have call predecessors, (591), 188 states have return successors, (593), 564 states have call predecessors, (593), 581 states have call successors, (593) [2022-11-16 20:22:29,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 3651 transitions. [2022-11-16 20:22:29,111 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 3651 transitions. Word has length 29 [2022-11-16 20:22:29,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:22:29,114 INFO L495 AbstractCegarLoop]: Abstraction has 2551 states and 3651 transitions. [2022-11-16 20:22:29,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 20:22:29,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 3651 transitions. [2022-11-16 20:22:29,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 20:22:29,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:29,118 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 20:22:29,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 20:22:29,119 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:29,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:29,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1139901000, now seen corresponding path program 1 times [2022-11-16 20:22:29,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:29,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698987341] [2022-11-16 20:22:29,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:29,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:22:32,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:32,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698987341] [2022-11-16 20:22:32,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698987341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:22:32,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:22:32,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:22:32,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792372859] [2022-11-16 20:22:32,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:22:32,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:22:32,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:22:32,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:22:32,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:22:32,154 INFO L87 Difference]: Start difference. First operand 2551 states and 3651 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 20:22:34,940 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 [] [2022-11-16 20:22:35,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:22:35,585 INFO L93 Difference]: Finished difference Result 5923 states and 8426 transitions. [2022-11-16 20:22:35,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:22:35,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2022-11-16 20:22:35,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:22:35,614 INFO L225 Difference]: With dead ends: 5923 [2022-11-16 20:22:35,614 INFO L226 Difference]: Without dead ends: 3367 [2022-11-16 20:22:35,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:22:35,629 INFO L413 NwaCegarLoop]: 1019 mSDtfsCounter, 598 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 2540 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:22:35,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 2540 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 437 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2022-11-16 20:22:35,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2022-11-16 20:22:35,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 2695. [2022-11-16 20:22:35,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 1865 states have (on average 1.386058981233244) internal successors, (2585), 1905 states have internal predecessors, (2585), 621 states have call successors, (621), 221 states have call predecessors, (621), 208 states have return successors, (623), 592 states have call predecessors, (623), 611 states have call successors, (623) [2022-11-16 20:22:35,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 3829 transitions. [2022-11-16 20:22:35,885 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 3829 transitions. Word has length 54 [2022-11-16 20:22:35,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:22:35,888 INFO L495 AbstractCegarLoop]: Abstraction has 2695 states and 3829 transitions. [2022-11-16 20:22:35,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 20:22:35,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 3829 transitions. [2022-11-16 20:22:35,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 20:22:35,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:35,895 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:22:35,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 20:22:35,896 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:35,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:35,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2089726756, now seen corresponding path program 1 times [2022-11-16 20:22:35,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:35,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556097485] [2022-11-16 20:22:35,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:35,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:36,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:22:37,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:37,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556097485] [2022-11-16 20:22:37,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556097485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:22:37,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:22:37,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:22:37,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609848463] [2022-11-16 20:22:37,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:22:37,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:22:37,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:22:37,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:22:37,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:22:37,319 INFO L87 Difference]: Start difference. First operand 2695 states and 3829 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:22:40,281 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 [] [2022-11-16 20:22:40,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:22:40,500 INFO L93 Difference]: Finished difference Result 6146 states and 8705 transitions. [2022-11-16 20:22:40,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:22:40,501 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), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2022-11-16 20:22:40,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:22:40,528 INFO L225 Difference]: With dead ends: 6146 [2022-11-16 20:22:40,528 INFO L226 Difference]: Without dead ends: 3452 [2022-11-16 20:22:40,545 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 [2022-11-16 20:22:40,546 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 226 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-16 20:22:40,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1132 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-11-16 20:22:40,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3452 states. [2022-11-16 20:22:40,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3452 to 3345. [2022-11-16 20:22:40,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3345 states, 2345 states have (on average 1.4025586353944564) internal successors, (3289), 2401 states have internal predecessors, (3289), 727 states have call successors, (727), 291 states have call predecessors, (727), 272 states have return successors, (723), 676 states have call predecessors, (723), 711 states have call successors, (723) [2022-11-16 20:22:40,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3345 states to 3345 states and 4739 transitions. [2022-11-16 20:22:40,952 INFO L78 Accepts]: Start accepts. Automaton has 3345 states and 4739 transitions. Word has length 69 [2022-11-16 20:22:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:22:40,953 INFO L495 AbstractCegarLoop]: Abstraction has 3345 states and 4739 transitions. [2022-11-16 20:22:40,953 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), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-11-16 20:22:40,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3345 states and 4739 transitions. [2022-11-16 20:22:40,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 20:22:40,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:40,962 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:22:40,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 20:22:40,962 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:40,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:40,963 INFO L85 PathProgramCache]: Analyzing trace with hash -486914537, now seen corresponding path program 1 times [2022-11-16 20:22:40,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:40,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001884718] [2022-11-16 20:22:40,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:40,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 20:22:42,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:42,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001884718] [2022-11-16 20:22:42,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001884718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:22:42,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:22:42,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:22:42,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877621840] [2022-11-16 20:22:42,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:22:42,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:22:42,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:22:42,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:22:42,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:22:42,178 INFO L87 Difference]: Start difference. First operand 3345 states and 4739 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-16 20:22:45,117 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 [] [2022-11-16 20:22:45,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:22:45,382 INFO L93 Difference]: Finished difference Result 8434 states and 12014 transitions. [2022-11-16 20:22:45,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:22:45,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 71 [2022-11-16 20:22:45,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:22:45,417 INFO L225 Difference]: With dead ends: 8434 [2022-11-16 20:22:45,418 INFO L226 Difference]: Without dead ends: 5090 [2022-11-16 20:22:45,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:22:45,433 INFO L413 NwaCegarLoop]: 724 mSDtfsCounter, 534 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-16 20:22:45,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 1223 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 230 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-11-16 20:22:45,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5090 states. [2022-11-16 20:22:45,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5090 to 5075. [2022-11-16 20:22:45,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5075 states, 3613 states have (on average 1.4088015499584832) internal successors, (5090), 3687 states have internal predecessors, (5090), 1057 states have call successors, (1057), 427 states have call predecessors, (1057), 404 states have return successors, (1059), 996 states have call predecessors, (1059), 1041 states have call successors, (1059) [2022-11-16 20:22:45,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5075 states to 5075 states and 7206 transitions. [2022-11-16 20:22:45,867 INFO L78 Accepts]: Start accepts. Automaton has 5075 states and 7206 transitions. Word has length 71 [2022-11-16 20:22:45,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:22:45,868 INFO L495 AbstractCegarLoop]: Abstraction has 5075 states and 7206 transitions. [2022-11-16 20:22:45,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-16 20:22:45,869 INFO L276 IsEmpty]: Start isEmpty. Operand 5075 states and 7206 transitions. [2022-11-16 20:22:45,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-16 20:22:45,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:45,875 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:22:45,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 20:22:45,875 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:45,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:45,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1260461437, now seen corresponding path program 1 times [2022-11-16 20:22:45,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:45,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596253555] [2022-11-16 20:22:45,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:45,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:48,654 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 20:22:48,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:48,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596253555] [2022-11-16 20:22:48,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596253555] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:22:48,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:22:48,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 20:22:48,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081137838] [2022-11-16 20:22:48,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:22:48,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:22:48,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:22:48,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:22:48,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:22:48,659 INFO L87 Difference]: Start difference. First operand 5075 states and 7206 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-16 20:22:52,182 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 [] [2022-11-16 20:22:53,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:22:53,082 INFO L93 Difference]: Finished difference Result 11570 states and 16711 transitions. [2022-11-16 20:22:53,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 20:22:53,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 89 [2022-11-16 20:22:53,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:22:53,127 INFO L225 Difference]: With dead ends: 11570 [2022-11-16 20:22:53,128 INFO L226 Difference]: Without dead ends: 6496 [2022-11-16 20:22:53,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-16 20:22:53,151 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 366 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-16 20:22:53,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 2230 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 409 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2022-11-16 20:22:53,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6496 states. [2022-11-16 20:22:53,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6496 to 5123. [2022-11-16 20:22:53,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5123 states, 3661 states have (on average 1.4056268779022125) internal successors, (5146), 3735 states have internal predecessors, (5146), 1057 states have call successors, (1057), 427 states have call predecessors, (1057), 404 states have return successors, (1059), 996 states have call predecessors, (1059), 1041 states have call successors, (1059) [2022-11-16 20:22:53,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5123 states to 5123 states and 7262 transitions. [2022-11-16 20:22:53,651 INFO L78 Accepts]: Start accepts. Automaton has 5123 states and 7262 transitions. Word has length 89 [2022-11-16 20:22:53,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:22:53,651 INFO L495 AbstractCegarLoop]: Abstraction has 5123 states and 7262 transitions. [2022-11-16 20:22:53,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-16 20:22:53,652 INFO L276 IsEmpty]: Start isEmpty. Operand 5123 states and 7262 transitions. [2022-11-16 20:22:53,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-16 20:22:53,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:22:53,656 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:22:53,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 20:22:53,657 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:22:53,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:22:53,658 INFO L85 PathProgramCache]: Analyzing trace with hash 348029305, now seen corresponding path program 1 times [2022-11-16 20:22:53,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:22:53,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878698438] [2022-11-16 20:22:53,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:22:53,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:22:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:22:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-16 20:22:56,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:22:56,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878698438] [2022-11-16 20:22:56,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878698438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:22:56,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:22:56,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 20:22:56,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231548053] [2022-11-16 20:22:56,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:22:56,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:22:56,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:22:56,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:22:56,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:22:56,782 INFO L87 Difference]: Start difference. First operand 5123 states and 7262 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 20:23:00,563 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 [] [2022-11-16 20:23:00,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:00,958 INFO L93 Difference]: Finished difference Result 10299 states and 14590 transitions. [2022-11-16 20:23:00,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:23:00,959 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 108 [2022-11-16 20:23:00,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:00,987 INFO L225 Difference]: With dead ends: 10299 [2022-11-16 20:23:00,987 INFO L226 Difference]: Without dead ends: 5161 [2022-11-16 20:23:01,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-16 20:23:01,011 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 758 mSDsluCounter, 1499 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 2029 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:01,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 2029 Invalid, 452 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [43 Valid, 408 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2022-11-16 20:23:01,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2022-11-16 20:23:01,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 5125. [2022-11-16 20:23:01,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5125 states, 3663 states have (on average 1.3977613977613979) internal successors, (5120), 3737 states have internal predecessors, (5120), 1057 states have call successors, (1057), 427 states have call predecessors, (1057), 404 states have return successors, (1059), 996 states have call predecessors, (1059), 1041 states have call successors, (1059) [2022-11-16 20:23:01,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5125 states to 5125 states and 7236 transitions. [2022-11-16 20:23:01,494 INFO L78 Accepts]: Start accepts. Automaton has 5125 states and 7236 transitions. Word has length 108 [2022-11-16 20:23:01,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:01,495 INFO L495 AbstractCegarLoop]: Abstraction has 5125 states and 7236 transitions. [2022-11-16 20:23:01,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 states have internal predecessors, (65), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 20:23:01,496 INFO L276 IsEmpty]: Start isEmpty. Operand 5125 states and 7236 transitions. [2022-11-16 20:23:01,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-16 20:23:01,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:01,500 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:01,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 20:23:01,500 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:23:01,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:01,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1740207928, now seen corresponding path program 1 times [2022-11-16 20:23:01,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:01,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111895581] [2022-11-16 20:23:01,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:01,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 20:23:05,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:05,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111895581] [2022-11-16 20:23:05,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111895581] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:23:05,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784820180] [2022-11-16 20:23:05,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:05,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:23:05,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:23:05,026 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:23:05,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:23:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:08,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 13683 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 20:23:08,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:23:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 20:23:08,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:23:08,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784820180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:23:08,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:23:08,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-16 20:23:08,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333193848] [2022-11-16 20:23:08,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:08,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:23:08,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:08,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:23:08,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-16 20:23:08,447 INFO L87 Difference]: Start difference. First operand 5125 states and 7236 transitions. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 20:23:11,997 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 [] [2022-11-16 20:23:12,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:12,652 INFO L93 Difference]: Finished difference Result 10619 states and 14925 transitions. [2022-11-16 20:23:12,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 20:23:12,653 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 109 [2022-11-16 20:23:12,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:12,682 INFO L225 Difference]: With dead ends: 10619 [2022-11-16 20:23:12,683 INFO L226 Difference]: Without dead ends: 5429 [2022-11-16 20:23:12,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:23:12,705 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 612 mSDsluCounter, 1974 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 2732 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:12,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 2732 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 532 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2022-11-16 20:23:12,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5429 states. [2022-11-16 20:23:13,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5429 to 5255. [2022-11-16 20:23:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5255 states, 3741 states have (on average 1.392408446939321) internal successors, (5209), 3819 states have internal predecessors, (5209), 1090 states have call successors, (1090), 446 states have call predecessors, (1090), 423 states have return successors, (1092), 1025 states have call predecessors, (1092), 1074 states have call successors, (1092) [2022-11-16 20:23:13,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5255 states to 5255 states and 7391 transitions. [2022-11-16 20:23:13,210 INFO L78 Accepts]: Start accepts. Automaton has 5255 states and 7391 transitions. Word has length 109 [2022-11-16 20:23:13,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:13,211 INFO L495 AbstractCegarLoop]: Abstraction has 5255 states and 7391 transitions. [2022-11-16 20:23:13,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 20:23:13,211 INFO L276 IsEmpty]: Start isEmpty. Operand 5255 states and 7391 transitions. [2022-11-16 20:23:13,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-16 20:23:13,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:13,216 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:13,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 20:23:13,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 20:23:13,441 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:23:13,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:13,442 INFO L85 PathProgramCache]: Analyzing trace with hash -552189981, now seen corresponding path program 1 times [2022-11-16 20:23:13,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:13,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242968892] [2022-11-16 20:23:13,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:13,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 20:23:17,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:17,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242968892] [2022-11-16 20:23:17,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242968892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:23:17,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537853289] [2022-11-16 20:23:17,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:17,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:23:17,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:23:17,115 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:23:17,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 20:23:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:20,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 13801 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 20:23:20,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:23:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:23:20,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:23:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 20:23:20,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537853289] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 20:23:20,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:23:20,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 4] total 10 [2022-11-16 20:23:20,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966998548] [2022-11-16 20:23:20,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:20,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:23:20,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:20,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:23:20,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-16 20:23:20,539 INFO L87 Difference]: Start difference. First operand 5255 states and 7391 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 20:23:23,524 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 [] [2022-11-16 20:23:24,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:24,319 INFO L93 Difference]: Finished difference Result 14030 states and 19800 transitions. [2022-11-16 20:23:24,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:23:24,321 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 117 [2022-11-16 20:23:24,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:24,368 INFO L225 Difference]: With dead ends: 14030 [2022-11-16 20:23:24,368 INFO L226 Difference]: Without dead ends: 8791 [2022-11-16 20:23:24,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-16 20:23:24,392 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 557 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:24,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 1070 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 186 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-11-16 20:23:24,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8791 states. [2022-11-16 20:23:25,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8791 to 8750. [2022-11-16 20:23:25,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8750 states, 6295 states have (on average 1.4054011119936458) internal successors, (8847), 6408 states have internal predecessors, (8847), 1760 states have call successors, (1760), 728 states have call predecessors, (1760), 694 states have return successors, (1775), 1673 states have call predecessors, (1775), 1745 states have call successors, (1775) [2022-11-16 20:23:25,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8750 states to 8750 states and 12382 transitions. [2022-11-16 20:23:25,232 INFO L78 Accepts]: Start accepts. Automaton has 8750 states and 12382 transitions. Word has length 117 [2022-11-16 20:23:25,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:25,234 INFO L495 AbstractCegarLoop]: Abstraction has 8750 states and 12382 transitions. [2022-11-16 20:23:25,234 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 20:23:25,234 INFO L276 IsEmpty]: Start isEmpty. Operand 8750 states and 12382 transitions. [2022-11-16 20:23:25,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-16 20:23:25,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:25,240 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:25,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 20:23:25,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 20:23:25,467 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:23:25,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:25,468 INFO L85 PathProgramCache]: Analyzing trace with hash 405086990, now seen corresponding path program 1 times [2022-11-16 20:23:25,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:25,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670345220] [2022-11-16 20:23:25,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:25,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 20:23:29,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:29,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670345220] [2022-11-16 20:23:29,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670345220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:23:29,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338597319] [2022-11-16 20:23:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:29,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:23:29,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:23:29,621 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:23:29,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 20:23:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:32,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 13799 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 20:23:32,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:23:32,909 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:23:32,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:23:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 20:23:33,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338597319] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 20:23:33,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:23:33,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 13 [2022-11-16 20:23:33,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078629981] [2022-11-16 20:23:33,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:33,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:23:33,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:33,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:23:33,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=85, Unknown=0, NotChecked=0, Total=156 [2022-11-16 20:23:33,165 INFO L87 Difference]: Start difference. First operand 8750 states and 12382 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 20:23:36,819 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 [] [2022-11-16 20:23:38,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:38,077 INFO L93 Difference]: Finished difference Result 26104 states and 37210 transitions. [2022-11-16 20:23:38,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:23:38,077 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 116 [2022-11-16 20:23:38,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:38,159 INFO L225 Difference]: With dead ends: 26104 [2022-11-16 20:23:38,159 INFO L226 Difference]: Without dead ends: 17370 [2022-11-16 20:23:38,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=99, Unknown=0, NotChecked=0, Total=182 [2022-11-16 20:23:38,194 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 1567 mSDsluCounter, 1285 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 476 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1593 SdHoareTripleChecker+Valid, 1893 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:38,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1593 Valid, 1893 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [476 Valid, 505 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-11-16 20:23:38,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17370 states. [2022-11-16 20:23:39,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17370 to 15677. [2022-11-16 20:23:39,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15677 states, 11367 states have (on average 1.4143573502243336) internal successors, (16077), 11551 states have internal predecessors, (16077), 3085 states have call successors, (3085), 1276 states have call predecessors, (3085), 1224 states have return successors, (3125), 2957 states have call predecessors, (3125), 3071 states have call successors, (3125) [2022-11-16 20:23:39,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15677 states to 15677 states and 22287 transitions. [2022-11-16 20:23:39,552 INFO L78 Accepts]: Start accepts. Automaton has 15677 states and 22287 transitions. Word has length 116 [2022-11-16 20:23:39,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:39,553 INFO L495 AbstractCegarLoop]: Abstraction has 15677 states and 22287 transitions. [2022-11-16 20:23:39,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 20:23:39,553 INFO L276 IsEmpty]: Start isEmpty. Operand 15677 states and 22287 transitions. [2022-11-16 20:23:39,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-16 20:23:39,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:39,560 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:39,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 20:23:39,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:23:39,775 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:23:39,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:39,776 INFO L85 PathProgramCache]: Analyzing trace with hash 806685829, now seen corresponding path program 1 times [2022-11-16 20:23:39,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:39,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771956346] [2022-11-16 20:23:39,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:39,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-16 20:23:43,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:23:43,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771956346] [2022-11-16 20:23:43,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771956346] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:23:43,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628248017] [2022-11-16 20:23:43,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:43,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:23:43,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:23:43,925 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:23:43,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 20:23:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:23:46,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 13809 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 20:23:46,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:23:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 20:23:46,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:23:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-16 20:23:47,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628248017] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 20:23:47,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 20:23:47,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 4] total 10 [2022-11-16 20:23:47,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101767024] [2022-11-16 20:23:47,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:23:47,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:23:47,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:23:47,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:23:47,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-16 20:23:47,017 INFO L87 Difference]: Start difference. First operand 15677 states and 22287 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 20:23:50,149 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 [] [2022-11-16 20:23:51,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:23:51,542 INFO L93 Difference]: Finished difference Result 45150 states and 64320 transitions. [2022-11-16 20:23:51,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:23:51,543 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 121 [2022-11-16 20:23:51,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:23:51,673 INFO L225 Difference]: With dead ends: 45150 [2022-11-16 20:23:51,674 INFO L226 Difference]: Without dead ends: 29489 [2022-11-16 20:23:51,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-16 20:23:51,725 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 557 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:23:51,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 1070 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 186 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2022-11-16 20:23:51,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29489 states. [2022-11-16 20:23:54,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29489 to 29420. [2022-11-16 20:23:54,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29420 states, 21447 states have (on average 1.419918869771996) internal successors, (30453), 21774 states have internal predecessors, (30453), 5706 states have call successors, (5706), 2348 states have call predecessors, (5706), 2266 states have return successors, (5795), 5501 states have call predecessors, (5795), 5693 states have call successors, (5795) [2022-11-16 20:23:54,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29420 states to 29420 states and 41954 transitions. [2022-11-16 20:23:54,483 INFO L78 Accepts]: Start accepts. Automaton has 29420 states and 41954 transitions. Word has length 121 [2022-11-16 20:23:54,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:23:54,484 INFO L495 AbstractCegarLoop]: Abstraction has 29420 states and 41954 transitions. [2022-11-16 20:23:54,484 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 20:23:54,484 INFO L276 IsEmpty]: Start isEmpty. Operand 29420 states and 41954 transitions. [2022-11-16 20:23:54,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-16 20:23:54,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:23:54,496 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:23:54,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 20:23:54,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 20:23:54,723 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:23:54,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:23:54,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1250520015, now seen corresponding path program 1 times [2022-11-16 20:23:54,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:23:54,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417675714] [2022-11-16 20:23:54,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:23:54,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:23:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:24:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 20:24:00,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:24:00,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417675714] [2022-11-16 20:24:00,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417675714] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:24:00,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867629940] [2022-11-16 20:24:00,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:24:00,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:24:00,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:24:00,407 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:24:00,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_41f0b60d-5096-42be-a4e3-774d5a53b748/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 20:24:02,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:24:02,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 13831 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 20:24:02,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:24:03,280 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 20:24:03,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:24:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 20:24:03,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867629940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:24:03,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [28030399] [2022-11-16 20:24:03,633 INFO L159 IcfgInterpreter]: Started Sifa with 86 locations of interest [2022-11-16 20:24:03,634 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:24:03,638 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:24:03,645 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:24:03,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs