./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--usb--class--cdc-wdm.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 4de76b02991c4f8780142b48e1370b1ba073d7148b74e77b2c83d6f21359d59e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 16:00:49,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 16:00:49,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 16:00:49,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 16:00:49,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 16:00:49,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 16:00:49,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 16:00:49,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 16:00:49,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 16:00:49,182 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 16:00:49,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 16:00:49,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 16:00:49,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 16:00:49,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 16:00:49,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 16:00:49,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 16:00:49,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 16:00:49,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 16:00:49,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 16:00:49,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 16:00:49,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 16:00:49,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 16:00:49,197 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 16:00:49,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 16:00:49,201 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 16:00:49,202 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 16:00:49,202 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 16:00:49,203 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 16:00:49,204 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 16:00:49,205 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 16:00:49,205 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 16:00:49,206 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 16:00:49,207 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 16:00:49,208 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 16:00:49,209 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 16:00:49,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 16:00:49,210 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 16:00:49,210 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 16:00:49,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 16:00:49,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 16:00:49,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 16:00:49,213 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 16:00:49,243 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 16:00:49,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 16:00:49,245 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 16:00:49,245 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 16:00:49,263 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 16:00:49,264 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 16:00:49,265 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 16:00:49,265 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 16:00:49,265 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 16:00:49,266 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 16:00:49,267 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 16:00:49,267 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 16:00:49,267 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 16:00:49,267 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 16:00:49,268 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 16:00:49,268 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 16:00:49,268 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 16:00:49,268 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 16:00:49,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 16:00:49,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 16:00:49,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 16:00:49,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 16:00:49,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 16:00:49,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 16:00:49,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 16:00:49,271 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 16:00:49,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 16:00:49,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 16:00:49,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 16:00:49,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:00:49,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 16:00:49,273 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 16:00:49,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 16:00:49,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 16:00:49,274 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 16:00:49,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 16:00:49,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 16:00:49,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 16:00:49,275 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_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4de76b02991c4f8780142b48e1370b1ba073d7148b74e77b2c83d6f21359d59e [2022-11-23 16:00:49,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 16:00:49,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 16:00:49,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 16:00:49,583 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 16:00:49,583 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 16:00:49,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2022-11-23 16:00:52,630 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 16:00:53,256 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 16:00:53,257 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2022-11-23 16:00:53,290 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/data/8c6b67b7c/16405068dfa14ba9ac5f7bc605357925/FLAGad2aa7567 [2022-11-23 16:00:53,304 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/data/8c6b67b7c/16405068dfa14ba9ac5f7bc605357925 [2022-11-23 16:00:53,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 16:00:53,308 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 16:00:53,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 16:00:53,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 16:00:53,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 16:00:53,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:00:53" (1/1) ... [2022-11-23 16:00:53,317 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e006bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:53, skipping insertion in model container [2022-11-23 16:00:53,317 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:00:53" (1/1) ... [2022-11-23 16:00:53,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 16:00:53,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 16:00:55,017 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i[185536,185549] [2022-11-23 16:00:55,199 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:00:55,224 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 16:00:55,473 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i[185536,185549] [2022-11-23 16:00:55,496 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:00:55,619 INFO L208 MainTranslator]: Completed translation [2022-11-23 16:00:55,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:55 WrapperNode [2022-11-23 16:00:55,620 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 16:00:55,621 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 16:00:55,621 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 16:00:55,621 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 16:00:55,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:55" (1/1) ... [2022-11-23 16:00:55,723 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:55" (1/1) ... [2022-11-23 16:00:55,865 INFO L138 Inliner]: procedures = 282, calls = 1511, calls flagged for inlining = 101, calls inlined = 84, statements flattened = 2705 [2022-11-23 16:00:55,865 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 16:00:55,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 16:00:55,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 16:00:55,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 16:00:55,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:55" (1/1) ... [2022-11-23 16:00:55,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:55" (1/1) ... [2022-11-23 16:00:55,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:55" (1/1) ... [2022-11-23 16:00:55,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:55" (1/1) ... [2022-11-23 16:00:55,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:55" (1/1) ... [2022-11-23 16:00:56,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:55" (1/1) ... [2022-11-23 16:00:56,021 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:55" (1/1) ... [2022-11-23 16:00:56,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:55" (1/1) ... [2022-11-23 16:00:56,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 16:00:56,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 16:00:56,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 16:00:56,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 16:00:56,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:55" (1/1) ... [2022-11-23 16:00:56,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:00:56,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:00:56,091 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 16:00:56,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 16:00:56,144 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-11-23 16:00:56,144 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-11-23 16:00:56,144 INFO L130 BoogieDeclarations]: Found specification of procedure usb_translate_errors [2022-11-23 16:00:56,144 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_translate_errors [2022-11-23 16:00:56,145 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-23 16:00:56,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-23 16:00:56,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-23 16:00:56,145 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-23 16:00:56,145 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_wdm_mutex [2022-11-23 16:00:56,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_wdm_mutex [2022-11-23 16:00:56,146 INFO L130 BoogieDeclarations]: Found specification of procedure recover_from_urb_loss [2022-11-23 16:00:56,146 INFO L138 BoogieDeclarations]: Found implementation of procedure recover_from_urb_loss [2022-11-23 16:00:56,146 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_control_urb [2022-11-23 16:00:56,146 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_control_urb [2022-11-23 16:00:56,146 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 16:00:56,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 16:00:56,147 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2022-11-23 16:00:56,147 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2022-11-23 16:00:56,147 INFO L130 BoogieDeclarations]: Found specification of procedure __might_sleep [2022-11-23 16:00:56,147 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_sleep [2022-11-23 16:00:56,148 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2022-11-23 16:00:56,148 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2022-11-23 16:00:56,148 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_create [2022-11-23 16:00:56,148 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_create [2022-11-23 16:00:56,149 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-23 16:00:56,149 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-23 16:00:56,150 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-23 16:00:56,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-23 16:00:56,151 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_poll [2022-11-23 16:00:56,151 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_poll [2022-11-23 16:00:56,151 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-23 16:00:56,151 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-23 16:00:56,152 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 16:00:56,152 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 16:00:56,152 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-23 16:00:56,152 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-23 16:00:56,152 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-11-23 16:00:56,153 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-11-23 16:00:56,153 INFO L130 BoogieDeclarations]: Found specification of procedure clear_wdm_read_flag [2022-11-23 16:00:56,153 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_wdm_read_flag [2022-11-23 16:00:56,153 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_cancel_work_sync_39 [2022-11-23 16:00:56,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_cancel_work_sync_39 [2022-11-23 16:00:56,154 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_write [2022-11-23 16:00:56,154 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_write [2022-11-23 16:00:56,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 16:00:56,154 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-11-23 16:00:56,154 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-11-23 16:00:56,155 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_ioctl [2022-11-23 16:00:56,155 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_ioctl [2022-11-23 16:00:56,156 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_disconnect [2022-11-23 16:00:56,156 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_disconnect [2022-11-23 16:00:56,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 16:00:56,157 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_rlock_of_wdm_device [2022-11-23 16:00:56,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_rlock_of_wdm_device [2022-11-23 16:00:56,157 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-23 16:00:56,158 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-23 16:00:56,158 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2022-11-23 16:00:56,158 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2022-11-23 16:00:56,159 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_rxwork [2022-11-23 16:00:56,159 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_rxwork [2022-11-23 16:00:56,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 16:00:56,159 INFO L130 BoogieDeclarations]: Found specification of procedure disable_work_1 [2022-11-23 16:00:56,159 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_work_1 [2022-11-23 16:00:56,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 16:00:56,160 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_work_sync [2022-11-23 16:00:56,160 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_work_sync [2022-11-23 16:00:56,160 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2022-11-23 16:00:56,160 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2022-11-23 16:00:56,160 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-11-23 16:00:56,161 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-11-23 16:00:56,161 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2022-11-23 16:00:56,161 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2022-11-23 16:00:56,161 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2022-11-23 16:00:56,161 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2022-11-23 16:00:56,161 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-23 16:00:56,162 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-23 16:00:56,162 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-11-23 16:00:56,163 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-11-23 16:00:56,163 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_wdm_mutex [2022-11-23 16:00:56,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_wdm_mutex [2022-11-23 16:00:56,163 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_wlock_of_wdm_device [2022-11-23 16:00:56,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_wlock_of_wdm_device [2022-11-23 16:00:56,164 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-23 16:00:56,164 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-23 16:00:56,165 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2022-11-23 16:00:56,165 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2022-11-23 16:00:56,165 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-11-23 16:00:56,165 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-11-23 16:00:56,166 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_flush [2022-11-23 16:00:56,166 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_flush [2022-11-23 16:00:56,166 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_wlock_of_wdm_device [2022-11-23 16:00:56,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_wlock_of_wdm_device [2022-11-23 16:00:56,167 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2022-11-23 16:00:56,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2022-11-23 16:00:56,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-23 16:00:56,168 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2022-11-23 16:00:56,168 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2022-11-23 16:00:56,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 16:00:56,168 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-11-23 16:00:56,169 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-11-23 16:00:56,169 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-23 16:00:56,169 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-23 16:00:56,169 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-11-23 16:00:56,169 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-11-23 16:00:56,170 INFO L130 BoogieDeclarations]: Found specification of procedure kill_urbs [2022-11-23 16:00:56,170 INFO L138 BoogieDeclarations]: Found implementation of procedure kill_urbs [2022-11-23 16:00:56,170 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait_event [2022-11-23 16:00:56,170 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait_event [2022-11-23 16:00:56,170 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-23 16:00:56,171 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-23 16:00:56,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 16:00:56,175 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2022-11-23 16:00:56,175 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2022-11-23 16:00:56,176 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2022-11-23 16:00:56,176 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2022-11-23 16:00:56,176 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 16:00:56,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 16:00:56,179 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-23 16:00:56,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-23 16:00:56,179 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_resume [2022-11-23 16:00:56,184 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_resume [2022-11-23 16:00:56,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 16:00:56,184 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-23 16:00:56,185 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-23 16:00:56,185 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2022-11-23 16:00:56,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2022-11-23 16:00:56,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 16:00:56,186 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-11-23 16:00:56,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-11-23 16:00:56,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 16:00:56,187 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2022-11-23 16:00:56,187 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2022-11-23 16:00:56,187 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-11-23 16:00:56,187 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-11-23 16:00:56,187 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-11-23 16:00:56,187 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-11-23 16:00:56,188 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-23 16:00:56,188 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-23 16:00:56,188 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_rlock_of_wdm_device [2022-11-23 16:00:56,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_rlock_of_wdm_device [2022-11-23 16:00:56,188 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2022-11-23 16:00:56,188 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2022-11-23 16:00:56,189 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_find_device [2022-11-23 16:00:56,189 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_find_device [2022-11-23 16:00:56,189 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-23 16:00:56,189 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-23 16:00:56,189 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-23 16:00:56,189 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-23 16:00:56,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 16:00:56,190 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2022-11-23 16:00:56,190 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2022-11-23 16:00:56,190 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2022-11-23 16:00:56,190 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2022-11-23 16:00:56,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 16:00:56,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 16:00:56,760 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 16:00:56,763 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 16:00:57,281 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-23 16:01:02,230 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 16:01:02,752 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 16:01:02,753 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 16:01:02,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:01:02 BoogieIcfgContainer [2022-11-23 16:01:02,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 16:01:02,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 16:01:02,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 16:01:02,764 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 16:01:02,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:00:53" (1/3) ... [2022-11-23 16:01:02,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@279a2e54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:01:02, skipping insertion in model container [2022-11-23 16:01:02,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:00:55" (2/3) ... [2022-11-23 16:01:02,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@279a2e54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:01:02, skipping insertion in model container [2022-11-23 16:01:02,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:01:02" (3/3) ... [2022-11-23 16:01:02,769 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2022-11-23 16:01:02,788 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 16:01:02,788 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 16:01:02,887 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 16:01:02,894 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;@1d731b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 16:01:02,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 16:01:02,902 INFO L276 IsEmpty]: Start isEmpty. Operand has 861 states, 488 states have (on average 1.3176229508196722) internal successors, (643), 521 states have internal predecessors, (643), 301 states have call successors, (301), 71 states have call predecessors, (301), 70 states have return successors, (296), 295 states have call predecessors, (296), 296 states have call successors, (296) [2022-11-23 16:01:02,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-11-23 16:01:02,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:02,917 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:02,918 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:02,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:02,923 INFO L85 PathProgramCache]: Analyzing trace with hash 541392429, now seen corresponding path program 1 times [2022-11-23 16:01:02,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:02,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289556840] [2022-11-23 16:01:02,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:02,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:04,042 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-11-23 16:01:04,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:04,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289556840] [2022-11-23 16:01:04,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289556840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:04,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:04,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:01:04,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034019750] [2022-11-23 16:01:04,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:04,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:04,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:04,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:04,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:04,100 INFO L87 Difference]: Start difference. First operand has 861 states, 488 states have (on average 1.3176229508196722) internal successors, (643), 521 states have internal predecessors, (643), 301 states have call successors, (301), 71 states have call predecessors, (301), 70 states have return successors, (296), 295 states have call predecessors, (296), 296 states have call successors, (296) Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-23 16:01:05,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:08,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:08,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:08,956 INFO L93 Difference]: Finished difference Result 2474 states and 3610 transitions. [2022-11-23 16:01:08,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:01:08,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 140 [2022-11-23 16:01:08,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:08,983 INFO L225 Difference]: With dead ends: 2474 [2022-11-23 16:01:08,983 INFO L226 Difference]: Without dead ends: 1635 [2022-11-23 16:01:08,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:08,997 INFO L413 NwaCegarLoop]: 1365 mSDtfsCounter, 1116 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 2462 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:08,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1117 Valid, 2462 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 244 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-11-23 16:01:09,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2022-11-23 16:01:09,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1624. [2022-11-23 16:01:09,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 933 states have (on average 1.3054662379421222) internal successors, (1218), 973 states have internal predecessors, (1218), 553 states have call successors, (553), 138 states have call predecessors, (553), 137 states have return successors, (540), 536 states have call predecessors, (540), 539 states have call successors, (540) [2022-11-23 16:01:09,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2311 transitions. [2022-11-23 16:01:09,181 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2311 transitions. Word has length 140 [2022-11-23 16:01:09,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:09,182 INFO L495 AbstractCegarLoop]: Abstraction has 1624 states and 2311 transitions. [2022-11-23 16:01:09,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2022-11-23 16:01:09,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2311 transitions. [2022-11-23 16:01:09,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-23 16:01:09,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:09,202 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:09,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 16:01:09,203 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:09,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:09,204 INFO L85 PathProgramCache]: Analyzing trace with hash -91578783, now seen corresponding path program 1 times [2022-11-23 16:01:09,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:09,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894003417] [2022-11-23 16:01:09,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:09,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-11-23 16:01:09,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:09,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894003417] [2022-11-23 16:01:09,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894003417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:09,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:09,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:01:09,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222662938] [2022-11-23 16:01:09,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:09,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:09,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:09,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:09,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:09,568 INFO L87 Difference]: Start difference. First operand 1624 states and 2311 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 16:01:11,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:13,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:13,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:13,924 INFO L93 Difference]: Finished difference Result 4046 states and 5690 transitions. [2022-11-23 16:01:13,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:01:13,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 145 [2022-11-23 16:01:13,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:13,941 INFO L225 Difference]: With dead ends: 4046 [2022-11-23 16:01:13,941 INFO L226 Difference]: Without dead ends: 2458 [2022-11-23 16:01:13,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:13,948 INFO L413 NwaCegarLoop]: 1227 mSDtfsCounter, 620 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:13,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 2240 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-11-23 16:01:13,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2022-11-23 16:01:14,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2427. [2022-11-23 16:01:14,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2427 states, 1394 states have (on average 1.2984218077474892) internal successors, (1810), 1441 states have internal predecessors, (1810), 797 states have call successors, (797), 236 states have call predecessors, (797), 235 states have return successors, (786), 777 states have call predecessors, (786), 783 states have call successors, (786) [2022-11-23 16:01:14,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2427 states to 2427 states and 3393 transitions. [2022-11-23 16:01:14,092 INFO L78 Accepts]: Start accepts. Automaton has 2427 states and 3393 transitions. Word has length 145 [2022-11-23 16:01:14,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:14,094 INFO L495 AbstractCegarLoop]: Abstraction has 2427 states and 3393 transitions. [2022-11-23 16:01:14,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 16:01:14,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2427 states and 3393 transitions. [2022-11-23 16:01:14,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-23 16:01:14,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:14,101 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:14,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 16:01:14,101 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:14,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:14,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1064079305, now seen corresponding path program 1 times [2022-11-23 16:01:14,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:14,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276536438] [2022-11-23 16:01:14,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:14,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:14,519 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-11-23 16:01:14,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:14,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276536438] [2022-11-23 16:01:14,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276536438] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:14,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:14,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:01:14,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459634551] [2022-11-23 16:01:14,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:14,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:14,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:14,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:14,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:14,526 INFO L87 Difference]: Start difference. First operand 2427 states and 3393 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 16:01:15,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:18,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:18,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:18,493 INFO L93 Difference]: Finished difference Result 2473 states and 3442 transitions. [2022-11-23 16:01:18,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:01:18,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 155 [2022-11-23 16:01:18,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:18,509 INFO L225 Difference]: With dead ends: 2473 [2022-11-23 16:01:18,509 INFO L226 Difference]: Without dead ends: 2470 [2022-11-23 16:01:18,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:18,512 INFO L413 NwaCegarLoop]: 1104 mSDtfsCounter, 1144 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:18,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1145 Valid, 1159 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2022-11-23 16:01:18,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2022-11-23 16:01:18,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 2470. [2022-11-23 16:01:18,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2470 states, 1415 states have (on average 1.2932862190812722) internal successors, (1830), 1462 states have internal predecessors, (1830), 809 states have call successors, (809), 245 states have call predecessors, (809), 245 states have return successors, (800), 790 states have call predecessors, (800), 796 states have call successors, (800) [2022-11-23 16:01:18,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2470 states to 2470 states and 3439 transitions. [2022-11-23 16:01:18,760 INFO L78 Accepts]: Start accepts. Automaton has 2470 states and 3439 transitions. Word has length 155 [2022-11-23 16:01:18,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:18,761 INFO L495 AbstractCegarLoop]: Abstraction has 2470 states and 3439 transitions. [2022-11-23 16:01:18,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 16:01:18,761 INFO L276 IsEmpty]: Start isEmpty. Operand 2470 states and 3439 transitions. [2022-11-23 16:01:18,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-23 16:01:18,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:18,765 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:18,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 16:01:18,765 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:18,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:18,766 INFO L85 PathProgramCache]: Analyzing trace with hash -833600360, now seen corresponding path program 1 times [2022-11-23 16:01:18,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:18,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51978009] [2022-11-23 16:01:18,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:18,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-11-23 16:01:19,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:19,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51978009] [2022-11-23 16:01:19,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51978009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:19,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:19,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:01:19,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046270737] [2022-11-23 16:01:19,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:19,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:19,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:19,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:19,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:19,234 INFO L87 Difference]: Start difference. First operand 2470 states and 3439 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-23 16:01:21,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:24,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:24,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:24,392 INFO L93 Difference]: Finished difference Result 6183 states and 8596 transitions. [2022-11-23 16:01:24,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:01:24,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 161 [2022-11-23 16:01:24,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:24,418 INFO L225 Difference]: With dead ends: 6183 [2022-11-23 16:01:24,418 INFO L226 Difference]: Without dead ends: 3757 [2022-11-23 16:01:24,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:24,431 INFO L413 NwaCegarLoop]: 1563 mSDtfsCounter, 776 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 2639 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:24,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 2639 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 293 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2022-11-23 16:01:24,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3757 states. [2022-11-23 16:01:24,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3757 to 3734. [2022-11-23 16:01:24,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3734 states, 2179 states have (on average 1.3005966039467645) internal successors, (2834), 2254 states have internal predecessors, (2834), 1181 states have call successors, (1181), 373 states have call predecessors, (1181), 373 states have return successors, (1172), 1158 states have call predecessors, (1172), 1168 states have call successors, (1172) [2022-11-23 16:01:24,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3734 states to 3734 states and 5187 transitions. [2022-11-23 16:01:24,721 INFO L78 Accepts]: Start accepts. Automaton has 3734 states and 5187 transitions. Word has length 161 [2022-11-23 16:01:24,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:24,722 INFO L495 AbstractCegarLoop]: Abstraction has 3734 states and 5187 transitions. [2022-11-23 16:01:24,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-23 16:01:24,723 INFO L276 IsEmpty]: Start isEmpty. Operand 3734 states and 5187 transitions. [2022-11-23 16:01:24,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-23 16:01:24,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:24,725 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:24,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 16:01:24,726 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:24,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:24,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1372786815, now seen corresponding path program 1 times [2022-11-23 16:01:24,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:24,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48564000] [2022-11-23 16:01:24,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:24,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-11-23 16:01:25,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:25,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48564000] [2022-11-23 16:01:25,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48564000] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:25,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:25,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:01:25,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489043286] [2022-11-23 16:01:25,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:25,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:25,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:25,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:25,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:25,087 INFO L87 Difference]: Start difference. First operand 3734 states and 5187 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 16:01:27,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:28,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:28,441 INFO L93 Difference]: Finished difference Result 3736 states and 5188 transitions. [2022-11-23 16:01:28,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:01:28,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 156 [2022-11-23 16:01:28,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:28,464 INFO L225 Difference]: With dead ends: 3736 [2022-11-23 16:01:28,464 INFO L226 Difference]: Without dead ends: 3733 [2022-11-23 16:01:28,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:28,468 INFO L413 NwaCegarLoop]: 1089 mSDtfsCounter, 1162 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1162 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:28,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1162 Valid, 1089 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-23 16:01:28,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3733 states. [2022-11-23 16:01:28,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3733 to 3733. [2022-11-23 16:01:28,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 2179 states have (on average 1.3001376778338687) internal successors, (2833), 2253 states have internal predecessors, (2833), 1180 states have call successors, (1180), 373 states have call predecessors, (1180), 373 states have return successors, (1172), 1158 states have call predecessors, (1172), 1168 states have call successors, (1172) [2022-11-23 16:01:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 5185 transitions. [2022-11-23 16:01:28,729 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 5185 transitions. Word has length 156 [2022-11-23 16:01:28,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:28,730 INFO L495 AbstractCegarLoop]: Abstraction has 3733 states and 5185 transitions. [2022-11-23 16:01:28,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 16:01:28,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 5185 transitions. [2022-11-23 16:01:28,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-23 16:01:28,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:28,736 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:28,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 16:01:28,736 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:28,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:28,737 INFO L85 PathProgramCache]: Analyzing trace with hash -393769926, now seen corresponding path program 1 times [2022-11-23 16:01:28,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:28,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950732588] [2022-11-23 16:01:28,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:28,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-11-23 16:01:29,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:29,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950732588] [2022-11-23 16:01:29,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950732588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:29,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:29,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:01:29,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733931640] [2022-11-23 16:01:29,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:29,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:29,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:29,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:29,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:29,091 INFO L87 Difference]: Start difference. First operand 3733 states and 5185 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 16:01:31,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:33,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:33,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:33,843 INFO L93 Difference]: Finished difference Result 3735 states and 5186 transitions. [2022-11-23 16:01:33,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:01:33,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 157 [2022-11-23 16:01:33,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:33,865 INFO L225 Difference]: With dead ends: 3735 [2022-11-23 16:01:33,866 INFO L226 Difference]: Without dead ends: 3732 [2022-11-23 16:01:33,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:33,870 INFO L413 NwaCegarLoop]: 1100 mSDtfsCounter, 1138 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1139 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:33,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1139 Valid, 1155 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2022-11-23 16:01:33,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3732 states. [2022-11-23 16:01:34,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3732 to 3732. [2022-11-23 16:01:34,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3732 states, 2179 states have (on average 1.299678751720973) internal successors, (2832), 2252 states have internal predecessors, (2832), 1179 states have call successors, (1179), 373 states have call predecessors, (1179), 373 states have return successors, (1172), 1158 states have call predecessors, (1172), 1168 states have call successors, (1172) [2022-11-23 16:01:34,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3732 states to 3732 states and 5183 transitions. [2022-11-23 16:01:34,187 INFO L78 Accepts]: Start accepts. Automaton has 3732 states and 5183 transitions. Word has length 157 [2022-11-23 16:01:34,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:34,188 INFO L495 AbstractCegarLoop]: Abstraction has 3732 states and 5183 transitions. [2022-11-23 16:01:34,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 16:01:34,189 INFO L276 IsEmpty]: Start isEmpty. Operand 3732 states and 5183 transitions. [2022-11-23 16:01:34,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-23 16:01:34,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:34,192 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:34,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 16:01:34,192 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:34,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:34,193 INFO L85 PathProgramCache]: Analyzing trace with hash 677550818, now seen corresponding path program 1 times [2022-11-23 16:01:34,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:34,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111569085] [2022-11-23 16:01:34,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:34,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-11-23 16:01:34,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:34,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111569085] [2022-11-23 16:01:34,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111569085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:34,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:34,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:01:34,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359099586] [2022-11-23 16:01:34,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:34,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:34,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:34,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:34,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:34,490 INFO L87 Difference]: Start difference. First operand 3732 states and 5183 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 16:01:36,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:39,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:39,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:39,718 INFO L93 Difference]: Finished difference Result 10480 states and 14486 transitions. [2022-11-23 16:01:39,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:01:39,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 158 [2022-11-23 16:01:39,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:39,760 INFO L225 Difference]: With dead ends: 10480 [2022-11-23 16:01:39,761 INFO L226 Difference]: Without dead ends: 6792 [2022-11-23 16:01:39,776 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 [2022-11-23 16:01:39,777 INFO L413 NwaCegarLoop]: 1359 mSDtfsCounter, 954 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 2352 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:39,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 2352 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 245 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-11-23 16:01:39,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6792 states. [2022-11-23 16:01:40,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6792 to 6762. [2022-11-23 16:01:40,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6762 states, 3976 states have (on average 1.2997987927565393) internal successors, (5168), 4102 states have internal predecessors, (5168), 2076 states have call successors, (2076), 718 states have call predecessors, (2076), 709 states have return successors, (2072), 2025 states have call predecessors, (2072), 2064 states have call successors, (2072) [2022-11-23 16:01:40,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6762 states to 6762 states and 9316 transitions. [2022-11-23 16:01:40,301 INFO L78 Accepts]: Start accepts. Automaton has 6762 states and 9316 transitions. Word has length 158 [2022-11-23 16:01:40,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:40,302 INFO L495 AbstractCegarLoop]: Abstraction has 6762 states and 9316 transitions. [2022-11-23 16:01:40,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 16:01:40,302 INFO L276 IsEmpty]: Start isEmpty. Operand 6762 states and 9316 transitions. [2022-11-23 16:01:40,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-23 16:01:40,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:40,305 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:40,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 16:01:40,306 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:40,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:40,306 INFO L85 PathProgramCache]: Analyzing trace with hash -471239619, now seen corresponding path program 1 times [2022-11-23 16:01:40,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:40,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763234332] [2022-11-23 16:01:40,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:40,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-11-23 16:01:40,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:40,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763234332] [2022-11-23 16:01:40,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763234332] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:40,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:40,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:01:40,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523451699] [2022-11-23 16:01:40,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:40,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:40,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:40,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:40,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:40,623 INFO L87 Difference]: Start difference. First operand 6762 states and 9316 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 16:01:42,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:45,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:45,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:45,281 INFO L93 Difference]: Finished difference Result 7370 states and 9814 transitions. [2022-11-23 16:01:45,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:01:45,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 159 [2022-11-23 16:01:45,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:45,323 INFO L225 Difference]: With dead ends: 7370 [2022-11-23 16:01:45,323 INFO L226 Difference]: Without dead ends: 7366 [2022-11-23 16:01:45,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:45,327 INFO L413 NwaCegarLoop]: 1116 mSDtfsCounter, 950 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 1367 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:45,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 1367 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 170 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-11-23 16:01:45,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7366 states. [2022-11-23 16:01:45,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7366 to 7360. [2022-11-23 16:01:45,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7360 states, 4302 states have (on average 1.2791724779172478) internal successors, (5503), 4422 states have internal predecessors, (5503), 2146 states have call successors, (2146), 924 states have call predecessors, (2146), 911 states have return successors, (2144), 2097 states have call predecessors, (2144), 2136 states have call successors, (2144) [2022-11-23 16:01:45,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7360 states to 7360 states and 9793 transitions. [2022-11-23 16:01:45,896 INFO L78 Accepts]: Start accepts. Automaton has 7360 states and 9793 transitions. Word has length 159 [2022-11-23 16:01:45,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:45,897 INFO L495 AbstractCegarLoop]: Abstraction has 7360 states and 9793 transitions. [2022-11-23 16:01:45,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 16:01:45,897 INFO L276 IsEmpty]: Start isEmpty. Operand 7360 states and 9793 transitions. [2022-11-23 16:01:45,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-23 16:01:45,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:45,900 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:45,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 16:01:45,901 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:45,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:45,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1723999931, now seen corresponding path program 1 times [2022-11-23 16:01:45,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:45,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146166274] [2022-11-23 16:01:45,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:45,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:46,216 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-11-23 16:01:46,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:46,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146166274] [2022-11-23 16:01:46,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146166274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:46,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:46,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:01:46,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739334712] [2022-11-23 16:01:46,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:46,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:46,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:46,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:46,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:46,220 INFO L87 Difference]: Start difference. First operand 7360 states and 9793 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 16:01:47,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:51,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:51,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:51,197 INFO L93 Difference]: Finished difference Result 20180 states and 26949 transitions. [2022-11-23 16:01:51,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:01:51,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 160 [2022-11-23 16:01:51,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:51,261 INFO L225 Difference]: With dead ends: 20180 [2022-11-23 16:01:51,261 INFO L226 Difference]: Without dead ends: 12857 [2022-11-23 16:01:51,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:51,290 INFO L413 NwaCegarLoop]: 1302 mSDtfsCounter, 995 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:51,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [996 Valid, 2233 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 233 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-11-23 16:01:51,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12857 states. [2022-11-23 16:01:52,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12857 to 12800. [2022-11-23 16:01:52,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12800 states, 7581 states have (on average 1.2923097216726025) internal successors, (9797), 7793 states have internal predecessors, (9797), 3635 states have call successors, (3635), 1627 states have call predecessors, (3635), 1583 states have return successors, (3672), 3519 states have call predecessors, (3672), 3624 states have call successors, (3672) [2022-11-23 16:01:52,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12800 states to 12800 states and 17104 transitions. [2022-11-23 16:01:52,237 INFO L78 Accepts]: Start accepts. Automaton has 12800 states and 17104 transitions. Word has length 160 [2022-11-23 16:01:52,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:52,239 INFO L495 AbstractCegarLoop]: Abstraction has 12800 states and 17104 transitions. [2022-11-23 16:01:52,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-23 16:01:52,240 INFO L276 IsEmpty]: Start isEmpty. Operand 12800 states and 17104 transitions. [2022-11-23 16:01:52,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-23 16:01:52,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:52,247 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:52,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 16:01:52,247 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:52,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:52,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1937570439, now seen corresponding path program 1 times [2022-11-23 16:01:52,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:52,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867516528] [2022-11-23 16:01:52,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:52,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-11-23 16:01:52,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:52,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867516528] [2022-11-23 16:01:52,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867516528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:52,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:52,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:01:52,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296978765] [2022-11-23 16:01:52,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:52,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:52,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:52,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:52,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:52,568 INFO L87 Difference]: Start difference. First operand 12800 states and 17104 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 16:01:54,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:55,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:58,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:01:58,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:01:58,980 INFO L93 Difference]: Finished difference Result 19433 states and 25944 transitions. [2022-11-23 16:01:58,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:01:58,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 199 [2022-11-23 16:01:58,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:01:59,011 INFO L225 Difference]: With dead ends: 19433 [2022-11-23 16:01:59,011 INFO L226 Difference]: Without dead ends: 6675 [2022-11-23 16:01:59,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:59,052 INFO L413 NwaCegarLoop]: 1094 mSDtfsCounter, 12 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2174 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-23 16:01:59,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2174 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 237 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2022-11-23 16:01:59,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6675 states. [2022-11-23 16:01:59,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6675 to 6599. [2022-11-23 16:01:59,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6599 states, 3910 states have (on average 1.2936061381074169) internal successors, (5058), 4022 states have internal predecessors, (5058), 1870 states have call successors, (1870), 841 states have call predecessors, (1870), 818 states have return successors, (1883), 1806 states have call predecessors, (1883), 1859 states have call successors, (1883) [2022-11-23 16:01:59,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6599 states to 6599 states and 8811 transitions. [2022-11-23 16:01:59,480 INFO L78 Accepts]: Start accepts. Automaton has 6599 states and 8811 transitions. Word has length 199 [2022-11-23 16:01:59,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:01:59,481 INFO L495 AbstractCegarLoop]: Abstraction has 6599 states and 8811 transitions. [2022-11-23 16:01:59,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-23 16:01:59,481 INFO L276 IsEmpty]: Start isEmpty. Operand 6599 states and 8811 transitions. [2022-11-23 16:01:59,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-23 16:01:59,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:01:59,487 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:01:59,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 16:01:59,487 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:01:59,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:01:59,488 INFO L85 PathProgramCache]: Analyzing trace with hash 248828057, now seen corresponding path program 1 times [2022-11-23 16:01:59,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:01:59,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020572577] [2022-11-23 16:01:59,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:01:59,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:01:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:01:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2022-11-23 16:01:59,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:01:59,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020572577] [2022-11-23 16:01:59,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020572577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:01:59,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:01:59,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:01:59,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550141815] [2022-11-23 16:01:59,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:01:59,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:01:59,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:01:59,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:01:59,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:01:59,980 INFO L87 Difference]: Start difference. First operand 6599 states and 8811 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-23 16:02:02,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:06,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:06,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:02:06,379 INFO L93 Difference]: Finished difference Result 16346 states and 21745 transitions. [2022-11-23 16:02:06,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:02:06,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 205 [2022-11-23 16:02:06,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:02:06,421 INFO L225 Difference]: With dead ends: 16346 [2022-11-23 16:02:06,422 INFO L226 Difference]: Without dead ends: 9880 [2022-11-23 16:02:06,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:02:06,446 INFO L413 NwaCegarLoop]: 1512 mSDtfsCounter, 868 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 2491 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-23 16:02:06,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [869 Valid, 2491 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 303 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2022-11-23 16:02:06,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9880 states. [2022-11-23 16:02:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9880 to 9772. [2022-11-23 16:02:07,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9772 states, 5834 states have (on average 1.286252999657182) internal successors, (7504), 5998 states have internal predecessors, (7504), 2690 states have call successors, (2690), 1282 states have call predecessors, (2690), 1247 states have return successors, (2707), 2603 states have call predecessors, (2707), 2679 states have call successors, (2707) [2022-11-23 16:02:07,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9772 states to 9772 states and 12901 transitions. [2022-11-23 16:02:07,106 INFO L78 Accepts]: Start accepts. Automaton has 9772 states and 12901 transitions. Word has length 205 [2022-11-23 16:02:07,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:02:07,107 INFO L495 AbstractCegarLoop]: Abstraction has 9772 states and 12901 transitions. [2022-11-23 16:02:07,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-11-23 16:02:07,107 INFO L276 IsEmpty]: Start isEmpty. Operand 9772 states and 12901 transitions. [2022-11-23 16:02:07,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-11-23 16:02:07,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:02:07,113 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:02:07,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 16:02:07,113 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:02:07,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:02:07,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1278266910, now seen corresponding path program 1 times [2022-11-23 16:02:07,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:02:07,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068555270] [2022-11-23 16:02:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:07,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:02:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:02:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-11-23 16:02:07,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:02:07,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068555270] [2022-11-23 16:02:07,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068555270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:02:07,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:02:07,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:02:07,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890998240] [2022-11-23 16:02:07,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:02:07,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:02:07,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:02:07,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:02:07,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:02:07,563 INFO L87 Difference]: Start difference. First operand 9772 states and 12901 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-23 16:02:09,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:12,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:12,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:02:12,524 INFO L93 Difference]: Finished difference Result 9780 states and 12907 transitions. [2022-11-23 16:02:12,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:02:12,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 212 [2022-11-23 16:02:12,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:02:12,565 INFO L225 Difference]: With dead ends: 9780 [2022-11-23 16:02:12,566 INFO L226 Difference]: Without dead ends: 9777 [2022-11-23 16:02:12,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:02:12,573 INFO L413 NwaCegarLoop]: 1101 mSDtfsCounter, 248 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 2011 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-23 16:02:12,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 2011 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 246 Invalid, 2 Unknown, 0 Unchecked, 4.6s Time] [2022-11-23 16:02:12,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9777 states. [2022-11-23 16:02:13,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9777 to 9771. [2022-11-23 16:02:13,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9771 states, 5834 states have (on average 1.2840246828933837) internal successors, (7491), 5997 states have internal predecessors, (7491), 2689 states have call successors, (2689), 1282 states have call predecessors, (2689), 1247 states have return successors, (2707), 2603 states have call predecessors, (2707), 2679 states have call successors, (2707) [2022-11-23 16:02:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9771 states to 9771 states and 12887 transitions. [2022-11-23 16:02:13,331 INFO L78 Accepts]: Start accepts. Automaton has 9771 states and 12887 transitions. Word has length 212 [2022-11-23 16:02:13,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:02:13,332 INFO L495 AbstractCegarLoop]: Abstraction has 9771 states and 12887 transitions. [2022-11-23 16:02:13,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-23 16:02:13,332 INFO L276 IsEmpty]: Start isEmpty. Operand 9771 states and 12887 transitions. [2022-11-23 16:02:13,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-11-23 16:02:13,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:02:13,339 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:02:13,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 16:02:13,339 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:02:13,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:02:13,340 INFO L85 PathProgramCache]: Analyzing trace with hash -957966187, now seen corresponding path program 1 times [2022-11-23 16:02:13,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:02:13,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421059897] [2022-11-23 16:02:13,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:13,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:02:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:02:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2022-11-23 16:02:13,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:02:13,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421059897] [2022-11-23 16:02:13,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421059897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:02:13,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:02:13,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:02:13,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974286723] [2022-11-23 16:02:13,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:02:13,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:02:13,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:02:13,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:02:13,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:02:13,713 INFO L87 Difference]: Start difference. First operand 9771 states and 12887 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-23 16:02:15,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:19,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:19,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:02:19,052 INFO L93 Difference]: Finished difference Result 22803 states and 30074 transitions. [2022-11-23 16:02:19,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:02:19,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 223 [2022-11-23 16:02:19,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:02:19,108 INFO L225 Difference]: With dead ends: 22803 [2022-11-23 16:02:19,109 INFO L226 Difference]: Without dead ends: 13165 [2022-11-23 16:02:19,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:02:19,140 INFO L413 NwaCegarLoop]: 1441 mSDtfsCounter, 898 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 2413 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-23 16:02:19,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 2413 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 268 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-11-23 16:02:19,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13165 states. [2022-11-23 16:02:19,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13165 to 13139. [2022-11-23 16:02:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13139 states, 7973 states have (on average 1.2884735983945816) internal successors, (10273), 8202 states have internal predecessors, (10273), 3477 states have call successors, (3477), 1727 states have call predecessors, (3477), 1688 states have return successors, (3503), 3375 states have call predecessors, (3503), 3467 states have call successors, (3503) [2022-11-23 16:02:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13139 states to 13139 states and 17253 transitions. [2022-11-23 16:02:19,973 INFO L78 Accepts]: Start accepts. Automaton has 13139 states and 17253 transitions. Word has length 223 [2022-11-23 16:02:19,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:02:19,974 INFO L495 AbstractCegarLoop]: Abstraction has 13139 states and 17253 transitions. [2022-11-23 16:02:19,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2022-11-23 16:02:19,975 INFO L276 IsEmpty]: Start isEmpty. Operand 13139 states and 17253 transitions. [2022-11-23 16:02:19,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-11-23 16:02:19,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:02:19,980 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:02:19,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 16:02:19,981 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:02:19,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:02:19,981 INFO L85 PathProgramCache]: Analyzing trace with hash 963636320, now seen corresponding path program 1 times [2022-11-23 16:02:19,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:02:19,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473432390] [2022-11-23 16:02:19,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:19,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:02:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:02:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-11-23 16:02:21,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:02:21,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473432390] [2022-11-23 16:02:21,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473432390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:02:21,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:02:21,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:02:21,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33914413] [2022-11-23 16:02:21,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:02:21,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:02:21,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:02:21,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:02:21,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:02:21,036 INFO L87 Difference]: Start difference. First operand 13139 states and 17253 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-23 16:02:23,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:28,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:28,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:02:28,841 INFO L93 Difference]: Finished difference Result 31728 states and 41720 transitions. [2022-11-23 16:02:28,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:02:28,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 232 [2022-11-23 16:02:28,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:02:28,926 INFO L225 Difference]: With dead ends: 31728 [2022-11-23 16:02:28,926 INFO L226 Difference]: Without dead ends: 18724 [2022-11-23 16:02:28,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:02:28,968 INFO L413 NwaCegarLoop]: 1782 mSDtfsCounter, 1010 mSDsluCounter, 1899 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 3681 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-23 16:02:28,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1012 Valid, 3681 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 449 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2022-11-23 16:02:28,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18724 states. [2022-11-23 16:02:30,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18724 to 18574. [2022-11-23 16:02:30,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18574 states, 11318 states have (on average 1.2930729810920658) internal successors, (14635), 11680 states have internal predecessors, (14635), 4853 states have call successors, (4853), 2436 states have call predecessors, (4853), 2402 states have return successors, (4893), 4689 states have call predecessors, (4893), 4827 states have call successors, (4893) [2022-11-23 16:02:30,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18574 states to 18574 states and 24381 transitions. [2022-11-23 16:02:30,113 INFO L78 Accepts]: Start accepts. Automaton has 18574 states and 24381 transitions. Word has length 232 [2022-11-23 16:02:30,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:02:30,114 INFO L495 AbstractCegarLoop]: Abstraction has 18574 states and 24381 transitions. [2022-11-23 16:02:30,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-23 16:02:30,114 INFO L276 IsEmpty]: Start isEmpty. Operand 18574 states and 24381 transitions. [2022-11-23 16:02:30,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-11-23 16:02:30,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:02:30,121 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:02:30,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 16:02:30,121 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:02:30,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:02:30,122 INFO L85 PathProgramCache]: Analyzing trace with hash -2019444244, now seen corresponding path program 1 times [2022-11-23 16:02:30,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:02:30,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600028889] [2022-11-23 16:02:30,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:30,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:02:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:02:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2022-11-23 16:02:31,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:02:31,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600028889] [2022-11-23 16:02:31,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600028889] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:02:31,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903940204] [2022-11-23 16:02:31,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:31,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:02:31,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:02:31,354 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:02:31,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 16:02:32,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:02:32,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 3329 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 16:02:32,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:02:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2022-11-23 16:02:33,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:02:33,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903940204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:02:33,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:02:33,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-23 16:02:33,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850828657] [2022-11-23 16:02:33,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:02:33,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 16:02:33,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:02:33,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 16:02:33,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-23 16:02:33,337 INFO L87 Difference]: Start difference. First operand 18574 states and 24381 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-23 16:02:34,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:36,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:38,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:45,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:45,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:02:45,169 INFO L93 Difference]: Finished difference Result 40398 states and 53212 transitions. [2022-11-23 16:02:45,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:02:45,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 233 [2022-11-23 16:02:45,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:02:45,261 INFO L225 Difference]: With dead ends: 40398 [2022-11-23 16:02:45,262 INFO L226 Difference]: Without dead ends: 21959 [2022-11-23 16:02:45,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-23 16:02:45,318 INFO L413 NwaCegarLoop]: 1792 mSDtfsCounter, 1756 mSDsluCounter, 2654 mSDsCounter, 0 mSdLazyCounter, 1802 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1813 SdHoareTripleChecker+Valid, 4446 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1802 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-11-23 16:02:45,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1813 Valid, 4446 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1802 Invalid, 1 Unknown, 0 Unchecked, 10.6s Time] [2022-11-23 16:02:45,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21959 states. [2022-11-23 16:02:46,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21959 to 21028. [2022-11-23 16:02:46,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21028 states, 12914 states have (on average 1.2971968406380672) internal successors, (16752), 13334 states have internal predecessors, (16752), 5405 states have call successors, (5405), 2742 states have call predecessors, (5405), 2708 states have return successors, (5461), 5225 states have call predecessors, (5461), 5379 states have call successors, (5461) [2022-11-23 16:02:46,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21028 states to 21028 states and 27618 transitions. [2022-11-23 16:02:46,785 INFO L78 Accepts]: Start accepts. Automaton has 21028 states and 27618 transitions. Word has length 233 [2022-11-23 16:02:46,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:02:46,786 INFO L495 AbstractCegarLoop]: Abstraction has 21028 states and 27618 transitions. [2022-11-23 16:02:46,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2022-11-23 16:02:46,786 INFO L276 IsEmpty]: Start isEmpty. Operand 21028 states and 27618 transitions. [2022-11-23 16:02:46,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-11-23 16:02:46,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:02:46,794 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:02:46,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 16:02:47,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 16:02:47,006 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:02:47,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:02:47,007 INFO L85 PathProgramCache]: Analyzing trace with hash 2121602589, now seen corresponding path program 1 times [2022-11-23 16:02:47,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:02:47,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162906462] [2022-11-23 16:02:47,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:02:47,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:02:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:02:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2022-11-23 16:02:48,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:02:48,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162906462] [2022-11-23 16:02:48,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162906462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:02:48,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:02:48,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 16:02:48,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518913862] [2022-11-23 16:02:48,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:02:48,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 16:02:48,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:02:48,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 16:02:48,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 16:02:48,671 INFO L87 Difference]: Start difference. First operand 21028 states and 27618 transitions. Second operand has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-23 16:02:49,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:51,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:53,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:59,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:02:59,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:02:59,289 INFO L93 Difference]: Finished difference Result 42341 states and 55739 transitions. [2022-11-23 16:02:59,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 16:02:59,290 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) Word has length 244 [2022-11-23 16:02:59,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:02:59,361 INFO L225 Difference]: With dead ends: 42341 [2022-11-23 16:02:59,361 INFO L226 Difference]: Without dead ends: 21448 [2022-11-23 16:02:59,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 16:02:59,413 INFO L413 NwaCegarLoop]: 1087 mSDtfsCounter, 3 mSDsluCounter, 5418 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6505 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:02:59,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6505 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 729 Invalid, 1 Unknown, 0 Unchecked, 9.4s Time] [2022-11-23 16:02:59,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21448 states. [2022-11-23 16:03:00,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21448 to 21304. [2022-11-23 16:03:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21304 states, 13102 states have (on average 1.292932376736376) internal successors, (16940), 13522 states have internal predecessors, (16940), 5405 states have call successors, (5405), 2742 states have call predecessors, (5405), 2796 states have return successors, (5633), 5313 states have call predecessors, (5633), 5379 states have call successors, (5633) [2022-11-23 16:03:00,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21304 states to 21304 states and 27978 transitions. [2022-11-23 16:03:00,580 INFO L78 Accepts]: Start accepts. Automaton has 21304 states and 27978 transitions. Word has length 244 [2022-11-23 16:03:00,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:00,581 INFO L495 AbstractCegarLoop]: Abstraction has 21304 states and 27978 transitions. [2022-11-23 16:03:00,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) [2022-11-23 16:03:00,582 INFO L276 IsEmpty]: Start isEmpty. Operand 21304 states and 27978 transitions. [2022-11-23 16:03:00,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-23 16:03:00,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:00,591 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:00,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 16:03:00,591 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:03:00,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:00,592 INFO L85 PathProgramCache]: Analyzing trace with hash 267944007, now seen corresponding path program 1 times [2022-11-23 16:03:00,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:00,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082172059] [2022-11-23 16:03:00,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:00,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked. [2022-11-23 16:03:01,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:01,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082172059] [2022-11-23 16:03:01,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082172059] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:03:01,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858598163] [2022-11-23 16:03:01,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:01,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:03:01,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:03:01,675 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:03:01,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 16:03:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:02,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 3387 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 16:03:02,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:03:02,979 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2022-11-23 16:03:02,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:03:02,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858598163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:03:02,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:03:02,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-23 16:03:02,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662990423] [2022-11-23 16:03:02,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:02,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:03:02,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:02,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:03:02,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:03:02,982 INFO L87 Difference]: Start difference. First operand 21304 states and 27978 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-23 16:03:05,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:11,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:11,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:11,229 INFO L93 Difference]: Finished difference Result 42575 states and 55906 transitions. [2022-11-23 16:03:11,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:03:11,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 248 [2022-11-23 16:03:11,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:11,292 INFO L225 Difference]: With dead ends: 42575 [2022-11-23 16:03:11,292 INFO L226 Difference]: Without dead ends: 21398 [2022-11-23 16:03:11,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-23 16:03:11,348 INFO L413 NwaCegarLoop]: 1307 mSDtfsCounter, 1023 mSDsluCounter, 1711 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 3018 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:11,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1026 Valid, 3018 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 879 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2022-11-23 16:03:11,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21398 states. [2022-11-23 16:03:12,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21398 to 20991. [2022-11-23 16:03:12,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20991 states, 12924 states have (on average 1.293098112039616) internal successors, (16712), 13353 states have internal predecessors, (16712), 5324 states have call successors, (5324), 2661 states have call predecessors, (5324), 2742 states have return successors, (5552), 5250 states have call predecessors, (5552), 5298 states have call successors, (5552) [2022-11-23 16:03:12,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20991 states to 20991 states and 27588 transitions. [2022-11-23 16:03:12,480 INFO L78 Accepts]: Start accepts. Automaton has 20991 states and 27588 transitions. Word has length 248 [2022-11-23 16:03:12,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:12,480 INFO L495 AbstractCegarLoop]: Abstraction has 20991 states and 27588 transitions. [2022-11-23 16:03:12,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2022-11-23 16:03:12,481 INFO L276 IsEmpty]: Start isEmpty. Operand 20991 states and 27588 transitions. [2022-11-23 16:03:12,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-11-23 16:03:12,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:12,490 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:12,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 16:03:12,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 16:03:12,703 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:03:12,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:12,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1325698291, now seen corresponding path program 1 times [2022-11-23 16:03:12,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:12,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201635184] [2022-11-23 16:03:12,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:12,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2022-11-23 16:03:13,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:13,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201635184] [2022-11-23 16:03:13,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201635184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:03:13,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:03:13,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:03:13,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874115519] [2022-11-23 16:03:13,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:13,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:03:13,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:13,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:03:13,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:03:13,782 INFO L87 Difference]: Start difference. First operand 20991 states and 27588 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-23 16:03:16,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:21,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:21,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:21,310 INFO L93 Difference]: Finished difference Result 39549 states and 51493 transitions. [2022-11-23 16:03:21,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:03:21,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 246 [2022-11-23 16:03:21,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:21,507 INFO L225 Difference]: With dead ends: 39549 [2022-11-23 16:03:21,507 INFO L226 Difference]: Without dead ends: 18693 [2022-11-23 16:03:21,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:03:21,539 INFO L413 NwaCegarLoop]: 1951 mSDtfsCounter, 1113 mSDsluCounter, 1969 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1180 SdHoareTripleChecker+Valid, 3920 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:21,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1180 Valid, 3920 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 677 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2022-11-23 16:03:21,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18693 states. [2022-11-23 16:03:22,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18693 to 18498. [2022-11-23 16:03:22,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18498 states, 11347 states have (on average 1.2833348021503481) internal successors, (14562), 11704 states have internal predecessors, (14562), 4538 states have call successors, (4538), 2533 states have call predecessors, (4538), 2612 states have return successors, (4746), 4495 states have call predecessors, (4746), 4521 states have call successors, (4746) [2022-11-23 16:03:22,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18498 states to 18498 states and 23846 transitions. [2022-11-23 16:03:22,588 INFO L78 Accepts]: Start accepts. Automaton has 18498 states and 23846 transitions. Word has length 246 [2022-11-23 16:03:22,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:22,588 INFO L495 AbstractCegarLoop]: Abstraction has 18498 states and 23846 transitions. [2022-11-23 16:03:22,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2022-11-23 16:03:22,588 INFO L276 IsEmpty]: Start isEmpty. Operand 18498 states and 23846 transitions. [2022-11-23 16:03:22,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-23 16:03:22,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:22,601 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:22,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 16:03:22,601 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:03:22,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:22,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1102401781, now seen corresponding path program 1 times [2022-11-23 16:03:22,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:22,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366632152] [2022-11-23 16:03:22,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:22,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2022-11-23 16:03:23,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:23,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366632152] [2022-11-23 16:03:23,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366632152] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:03:23,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316749674] [2022-11-23 16:03:23,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:23,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:03:23,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:03:23,954 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:03:23,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 16:03:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:25,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 3350 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 16:03:25,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:03:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-11-23 16:03:25,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:03:25,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316749674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:03:25,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:03:25,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2022-11-23 16:03:25,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925077356] [2022-11-23 16:03:25,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:25,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:03:25,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:25,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:03:25,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-23 16:03:25,964 INFO L87 Difference]: Start difference. First operand 18498 states and 23846 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 1 states have call predecessors, (29), 1 states have call successors, (29) [2022-11-23 16:03:28,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:33,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:33,588 INFO L93 Difference]: Finished difference Result 39504 states and 51792 transitions. [2022-11-23 16:03:33,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:03:33,591 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 1 states have call predecessors, (29), 1 states have call successors, (29) Word has length 248 [2022-11-23 16:03:33,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:33,657 INFO L225 Difference]: With dead ends: 39504 [2022-11-23 16:03:33,657 INFO L226 Difference]: Without dead ends: 21103 [2022-11-23 16:03:33,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-23 16:03:33,700 INFO L413 NwaCegarLoop]: 1559 mSDtfsCounter, 1172 mSDsluCounter, 1553 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 76 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1195 SdHoareTripleChecker+Valid, 3112 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:33,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1195 Valid, 3112 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1069 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2022-11-23 16:03:33,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21103 states. [2022-11-23 16:03:34,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21103 to 18594. [2022-11-23 16:03:34,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18594 states, 11420 states have (on average 1.2835376532399299) internal successors, (14658), 11796 states have internal predecessors, (14658), 4581 states have call successors, (4581), 2507 states have call predecessors, (4581), 2592 states have return successors, (4789), 4533 states have call predecessors, (4789), 4564 states have call successors, (4789) [2022-11-23 16:03:34,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18594 states to 18594 states and 24028 transitions. [2022-11-23 16:03:34,881 INFO L78 Accepts]: Start accepts. Automaton has 18594 states and 24028 transitions. Word has length 248 [2022-11-23 16:03:34,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:34,882 INFO L495 AbstractCegarLoop]: Abstraction has 18594 states and 24028 transitions. [2022-11-23 16:03:34,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 1 states have call predecessors, (29), 1 states have call successors, (29) [2022-11-23 16:03:34,882 INFO L276 IsEmpty]: Start isEmpty. Operand 18594 states and 24028 transitions. [2022-11-23 16:03:34,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-11-23 16:03:34,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:34,891 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:34,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 16:03:35,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:03:35,107 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:03:35,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:35,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1665524102, now seen corresponding path program 1 times [2022-11-23 16:03:35,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:35,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267639260] [2022-11-23 16:03:35,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:35,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2022-11-23 16:03:36,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:36,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267639260] [2022-11-23 16:03:36,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267639260] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:03:36,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780817956] [2022-11-23 16:03:36,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:36,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:03:36,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:03:36,291 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:03:36,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 16:03:37,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:37,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 3579 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 16:03:37,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:03:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2022-11-23 16:03:38,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:03:38,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780817956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:03:38,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 16:03:38,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2022-11-23 16:03:38,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602905002] [2022-11-23 16:03:38,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:38,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 16:03:38,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:38,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 16:03:38,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-23 16:03:38,579 INFO L87 Difference]: Start difference. First operand 18594 states and 24028 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 6 states have internal predecessors, (90), 4 states have call successors, (35), 3 states have call predecessors, (35), 4 states have return successors, (33), 5 states have call predecessors, (33), 4 states have call successors, (33) [2022-11-23 16:03:40,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:41,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:49,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:03:49,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:03:49,645 INFO L93 Difference]: Finished difference Result 39697 states and 51440 transitions. [2022-11-23 16:03:49,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 16:03:49,646 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 6 states have internal predecessors, (90), 4 states have call successors, (35), 3 states have call predecessors, (35), 4 states have return successors, (33), 5 states have call predecessors, (33), 4 states have call successors, (33) Word has length 252 [2022-11-23 16:03:49,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:03:49,729 INFO L225 Difference]: With dead ends: 39697 [2022-11-23 16:03:49,730 INFO L226 Difference]: Without dead ends: 21238 [2022-11-23 16:03:49,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-23 16:03:49,780 INFO L413 NwaCegarLoop]: 1800 mSDtfsCounter, 1800 mSDsluCounter, 3753 mSDsCounter, 0 mSdLazyCounter, 2936 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1877 SdHoareTripleChecker+Valid, 5553 SdHoareTripleChecker+Invalid, 2999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2936 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:03:49,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1877 Valid, 5553 Invalid, 2999 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [62 Valid, 2936 Invalid, 1 Unknown, 0 Unchecked, 9.4s Time] [2022-11-23 16:03:49,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21238 states. [2022-11-23 16:03:51,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21238 to 18600. [2022-11-23 16:03:51,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18600 states, 11426 states have (on average 1.283388762471556) internal successors, (14664), 11796 states have internal predecessors, (14664), 4581 states have call successors, (4581), 2507 states have call predecessors, (4581), 2592 states have return successors, (4789), 4539 states have call predecessors, (4789), 4564 states have call successors, (4789) [2022-11-23 16:03:51,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18600 states to 18600 states and 24034 transitions. [2022-11-23 16:03:51,491 INFO L78 Accepts]: Start accepts. Automaton has 18600 states and 24034 transitions. Word has length 252 [2022-11-23 16:03:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:03:51,492 INFO L495 AbstractCegarLoop]: Abstraction has 18600 states and 24034 transitions. [2022-11-23 16:03:51,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 6 states have internal predecessors, (90), 4 states have call successors, (35), 3 states have call predecessors, (35), 4 states have return successors, (33), 5 states have call predecessors, (33), 4 states have call successors, (33) [2022-11-23 16:03:51,492 INFO L276 IsEmpty]: Start isEmpty. Operand 18600 states and 24034 transitions. [2022-11-23 16:03:51,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-11-23 16:03:51,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:03:51,513 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:03:51,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 16:03:51,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:03:51,727 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:03:51,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:03:51,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1689983542, now seen corresponding path program 1 times [2022-11-23 16:03:51,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:03:51,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880579521] [2022-11-23 16:03:51,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:51,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:03:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2022-11-23 16:03:52,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:03:52,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880579521] [2022-11-23 16:03:52,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880579521] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:03:52,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648395514] [2022-11-23 16:03:52,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:03:52,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:03:52,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:03:52,735 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:03:52,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 16:03:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:03:54,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 3727 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 16:03:54,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:03:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 239 proven. 2 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-11-23 16:03:54,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:03:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2022-11-23 16:03:54,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648395514] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 16:03:54,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:03:54,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 5] total 11 [2022-11-23 16:03:54,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607424427] [2022-11-23 16:03:54,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:03:54,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 16:03:54,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:03:54,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 16:03:54,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-23 16:03:54,981 INFO L87 Difference]: Start difference. First operand 18600 states and 24034 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2022-11-23 16:04:03,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:03,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:04:03,317 INFO L93 Difference]: Finished difference Result 48642 states and 64513 transitions. [2022-11-23 16:04:03,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 16:04:03,318 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) Word has length 291 [2022-11-23 16:04:03,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:04:03,399 INFO L225 Difference]: With dead ends: 48642 [2022-11-23 16:04:03,399 INFO L226 Difference]: Without dead ends: 30177 [2022-11-23 16:04:03,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-11-23 16:04:03,442 INFO L413 NwaCegarLoop]: 1564 mSDtfsCounter, 1683 mSDsluCounter, 2255 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1866 SdHoareTripleChecker+Valid, 3819 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:04:03,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1866 Valid, 3819 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1745 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2022-11-23 16:04:03,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30177 states. [2022-11-23 16:04:04,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30177 to 24592. [2022-11-23 16:04:05,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24592 states, 15169 states have (on average 1.286571296723581) internal successors, (19516), 15665 states have internal predecessors, (19516), 5954 states have call successors, (5954), 3359 states have call predecessors, (5954), 3468 states have return successors, (6214), 5899 states have call predecessors, (6214), 5937 states have call successors, (6214) [2022-11-23 16:04:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24592 states to 24592 states and 31684 transitions. [2022-11-23 16:04:05,092 INFO L78 Accepts]: Start accepts. Automaton has 24592 states and 31684 transitions. Word has length 291 [2022-11-23 16:04:05,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:04:05,093 INFO L495 AbstractCegarLoop]: Abstraction has 24592 states and 31684 transitions. [2022-11-23 16:04:05,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2022-11-23 16:04:05,093 INFO L276 IsEmpty]: Start isEmpty. Operand 24592 states and 31684 transitions. [2022-11-23 16:04:05,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-11-23 16:04:05,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:04:05,124 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:04:05,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 16:04:05,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-23 16:04:05,326 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:04:05,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:04:05,327 INFO L85 PathProgramCache]: Analyzing trace with hash 875345392, now seen corresponding path program 1 times [2022-11-23 16:04:05,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:04:05,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805260374] [2022-11-23 16:04:05,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:04:05,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:04:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:04:06,980 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2022-11-23 16:04:06,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:04:06,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805260374] [2022-11-23 16:04:06,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805260374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:04:06,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845879322] [2022-11-23 16:04:06,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:04:06,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:04:06,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:04:06,983 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:04:07,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 16:04:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:04:08,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 3977 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 16:04:08,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:04:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 239 proven. 2 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2022-11-23 16:04:08,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:04:09,403 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 603 trivial. 0 not checked. [2022-11-23 16:04:09,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845879322] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 16:04:09,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:04:09,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 8] total 20 [2022-11-23 16:04:09,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462308376] [2022-11-23 16:04:09,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:04:09,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 16:04:09,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:04:09,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 16:04:09,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-11-23 16:04:09,406 INFO L87 Difference]: Start difference. First operand 24592 states and 31684 transitions. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 5 states have call predecessors, (41), 4 states have call successors, (41) [2022-11-23 16:04:11,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:21,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:04:21,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:04:21,815 INFO L93 Difference]: Finished difference Result 58155 states and 76537 transitions. [2022-11-23 16:04:21,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 16:04:21,816 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 5 states have call predecessors, (41), 4 states have call successors, (41) Word has length 310 [2022-11-23 16:04:21,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:04:21,910 INFO L225 Difference]: With dead ends: 58155 [2022-11-23 16:04:21,910 INFO L226 Difference]: Without dead ends: 33698 [2022-11-23 16:04:21,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 610 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2022-11-23 16:04:21,956 INFO L413 NwaCegarLoop]: 1533 mSDtfsCounter, 2699 mSDsluCounter, 4213 mSDsCounter, 0 mSdLazyCounter, 4131 mSolverCounterSat, 1314 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2862 SdHoareTripleChecker+Valid, 5746 SdHoareTripleChecker+Invalid, 5447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1314 IncrementalHoareTripleChecker+Valid, 4131 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-23 16:04:21,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2862 Valid, 5746 Invalid, 5447 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1314 Valid, 4131 Invalid, 2 Unknown, 0 Unchecked, 9.8s Time] [2022-11-23 16:04:21,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33698 states. [2022-11-23 16:04:23,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33698 to 28758. [2022-11-23 16:04:23,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28758 states, 17823 states have (on average 1.290916231835269) internal successors, (23008), 18395 states have internal predecessors, (23008), 6884 states have call successors, (6884), 3912 states have call predecessors, (6884), 4050 states have return successors, (7195), 6847 states have call predecessors, (7195), 6867 states have call successors, (7195) [2022-11-23 16:04:23,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28758 states to 28758 states and 37087 transitions. [2022-11-23 16:04:23,797 INFO L78 Accepts]: Start accepts. Automaton has 28758 states and 37087 transitions. Word has length 310 [2022-11-23 16:04:23,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:04:23,797 INFO L495 AbstractCegarLoop]: Abstraction has 28758 states and 37087 transitions. [2022-11-23 16:04:23,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 8 states have internal predecessors, (112), 4 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 5 states have call predecessors, (41), 4 states have call successors, (41) [2022-11-23 16:04:23,798 INFO L276 IsEmpty]: Start isEmpty. Operand 28758 states and 37087 transitions. [2022-11-23 16:04:23,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-11-23 16:04:23,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:04:23,839 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 5, 5, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:04:23,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 16:04:24,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:04:24,039 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:04:24,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:04:24,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1212594435, now seen corresponding path program 1 times [2022-11-23 16:04:24,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:04:24,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571483932] [2022-11-23 16:04:24,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:04:24,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:04:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:04:25,764 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 603 trivial. 0 not checked. [2022-11-23 16:04:25,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:04:25,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571483932] [2022-11-23 16:04:25,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571483932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:04:25,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967359762] [2022-11-23 16:04:25,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:04:25,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:04:25,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:04:25,767 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:04:25,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2127be1-4102-4dd9-8192-f2026d9441c5/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 16:04:27,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:04:27,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 3990 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 16:04:27,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:04:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 265 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-11-23 16:04:27,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:04:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2022-11-23 16:04:27,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967359762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:04:27,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [137325558] [2022-11-23 16:04:27,992 INFO L159 IcfgInterpreter]: Started Sifa with 177 locations of interest [2022-11-23 16:04:27,992 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:04:27,996 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:04:28,002 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:04:28,002 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:04:50,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-23 16:04:51,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 55 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 89 [2022-11-23 16:04:51,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 9 [2022-11-23 16:04:51,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-23 16:04:51,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-23 16:04:51,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-23 16:04:51,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-23 16:04:51,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-23 16:04:51,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-23 16:04:51,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-23 16:04:51,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-23 16:04:51,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:51,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:52,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 171 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 0 case distinctions, treesize of input 1037 treesize of output 850 [2022-11-23 16:04:55,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:55,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:55,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:55,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:55,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:55,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:55,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:55,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:55,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:04:58,888 INFO L217 Elim1Store]: Index analysis took 6103 ms [2022-11-23 16:09:09,515 WARN L233 SmtUtils]: Spent 4.18m on a formula simplification. DAG size of input: 4366 DAG size of output: 1705 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-23 16:09:09,527 INFO L321 Elim1Store]: treesize reduction 25468, result has 13.4 percent of original size [2022-11-23 16:09:09,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 125 select indices, 125 select index equivalence classes, 7768 disjoint index pairs (out of 7750 index pairs), introduced 125 new quantified variables, introduced 132 case distinctions, treesize of input 656 treesize of output 4330