./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta --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 65cc93bea37c503291576929a444106bffa9d5b7b84b8d294ee7e7120b60ffa5 --- 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-dbf71c6-m [2022-10-17 17:37:06,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:37:06,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:37:06,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:37:06,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:37:06,915 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:37:06,917 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:37:06,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:37:06,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:37:06,931 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:37:06,932 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:37:06,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:37:06,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:37:06,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:37:06,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:37:06,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:37:06,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:37:06,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:37:06,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:37:06,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:37:06,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:37:06,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:37:06,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:37:06,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:37:06,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:37:06,975 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:37:06,976 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:37:06,978 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:37:06,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:37:06,980 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:37:06,980 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:37:06,982 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:37:06,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:37:06,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:37:06,988 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:37:06,988 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:37:06,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:37:06,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:37:06,990 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:37:06,991 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:37:06,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:37:06,993 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-10-17 17:37:07,028 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:37:07,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:37:07,029 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:37:07,029 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:37:07,030 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:37:07,030 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:37:07,030 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:37:07,031 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:37:07,031 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:37:07,031 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:37:07,032 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:37:07,032 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:37:07,032 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:37:07,032 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:37:07,033 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:37:07,033 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:37:07,033 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:37:07,033 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:37:07,034 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:37:07,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:37:07,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:37:07,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:37:07,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:37:07,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:37:07,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:37:07,045 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:37:07,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:37:07,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:37:07,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:37:07,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:37:07,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:37:07,046 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:37:07,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:37:07,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:37:07,047 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:37:07,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:37:07,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:37:07,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:37:07,048 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_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65cc93bea37c503291576929a444106bffa9d5b7b84b8d294ee7e7120b60ffa5 [2022-10-17 17:37:07,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:37:07,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:37:07,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:37:07,404 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:37:07,405 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:37:07,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i [2022-10-17 17:37:07,466 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/data/bcf74244f/4c325df342df437794de63f76a8410ef/FLAG25b08b131 [2022-10-17 17:37:08,216 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:37:08,217 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i [2022-10-17 17:37:08,250 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/data/bcf74244f/4c325df342df437794de63f76a8410ef/FLAG25b08b131 [2022-10-17 17:37:08,341 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/data/bcf74244f/4c325df342df437794de63f76a8410ef [2022-10-17 17:37:08,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:37:08,345 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:37:08,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:37:08,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:37:08,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:37:08,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:37:08" (1/1) ... [2022-10-17 17:37:08,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5efb288e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:08, skipping insertion in model container [2022-10-17 17:37:08,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:37:08" (1/1) ... [2022-10-17 17:37:08,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:37:08,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:37:09,728 WARN L230 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_624777a5-1ca8-47d8-818e-2139f2baaadd/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i[138616,138629] [2022-10-17 17:37:09,852 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:37:09,895 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:37:10,156 WARN L230 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_624777a5-1ca8-47d8-818e-2139f2baaadd/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i[138616,138629] [2022-10-17 17:37:10,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:37:10,242 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:37:10,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10 WrapperNode [2022-10-17 17:37:10,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:37:10,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:37:10,244 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:37:10,244 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:37:10,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:10,331 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:10,425 INFO L138 Inliner]: procedures = 161, calls = 836, calls flagged for inlining = 53, calls inlined = 28, statements flattened = 1124 [2022-10-17 17:37:10,427 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:37:10,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:37:10,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:37:10,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:37:10,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:10,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:10,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:10,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:10,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:10,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:10,619 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:10,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:10,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:37:10,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:37:10,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:37:10,646 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:37:10,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (1/1) ... [2022-10-17 17:37:10,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:37:10,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:10,723 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:37:10,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:37:10,766 INFO L130 BoogieDeclarations]: Found specification of procedure pi_release [2022-10-17 17:37:10,767 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_release [2022-10-17 17:37:10,767 INFO L130 BoogieDeclarations]: Found specification of procedure pf_getgeo [2022-10-17 17:37:10,767 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_getgeo [2022-10-17 17:37:10,767 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2022-10-17 17:37:10,767 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2022-10-17 17:37:10,768 INFO L130 BoogieDeclarations]: Found specification of procedure pi_disconnect [2022-10-17 17:37:10,768 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_disconnect [2022-10-17 17:37:10,768 INFO L130 BoogieDeclarations]: Found specification of procedure status_reg [2022-10-17 17:37:10,768 INFO L138 BoogieDeclarations]: Found implementation of procedure status_reg [2022-10-17 17:37:10,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-10-17 17:37:10,769 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_pf_mutex [2022-10-17 17:37:10,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_pf_mutex [2022-10-17 17:37:10,769 INFO L130 BoogieDeclarations]: Found specification of procedure pf_reset [2022-10-17 17:37:10,769 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_reset [2022-10-17 17:37:10,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:37:10,769 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_block [2022-10-17 17:37:10,770 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_block [2022-10-17 17:37:10,770 INFO L130 BoogieDeclarations]: Found specification of procedure pf_wait [2022-10-17 17:37:10,770 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_wait [2022-10-17 17:37:10,770 INFO L130 BoogieDeclarations]: Found specification of procedure read_reg [2022-10-17 17:37:10,770 INFO L138 BoogieDeclarations]: Found implementation of procedure read_reg [2022-10-17 17:37:10,771 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-10-17 17:37:10,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-10-17 17:37:10,771 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_pf_mutex [2022-10-17 17:37:10,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_pf_mutex [2022-10-17 17:37:10,771 INFO L130 BoogieDeclarations]: Found specification of procedure pf_check_events [2022-10-17 17:37:10,771 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_check_events [2022-10-17 17:37:10,772 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_blkdev [2022-10-17 17:37:10,772 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_blkdev [2022-10-17 17:37:10,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:37:10,772 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-10-17 17:37:10,772 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-10-17 17:37:10,773 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-10-17 17:37:10,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-10-17 17:37:10,773 INFO L130 BoogieDeclarations]: Found specification of procedure set_capacity [2022-10-17 17:37:10,773 INFO L138 BoogieDeclarations]: Found implementation of procedure set_capacity [2022-10-17 17:37:10,773 INFO L130 BoogieDeclarations]: Found specification of procedure pf_req_sense [2022-10-17 17:37:10,773 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_req_sense [2022-10-17 17:37:10,774 INFO L130 BoogieDeclarations]: Found specification of procedure pf_completion [2022-10-17 17:37:10,774 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_completion [2022-10-17 17:37:10,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:37:10,774 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-10-17 17:37:10,774 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-10-17 17:37:10,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:37:10,775 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2022-10-17 17:37:10,775 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2022-10-17 17:37:10,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:37:10,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:37:10,775 INFO L130 BoogieDeclarations]: Found specification of procedure pf_atapi [2022-10-17 17:37:10,776 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_atapi [2022-10-17 17:37:10,776 INFO L130 BoogieDeclarations]: Found specification of procedure pf_command [2022-10-17 17:37:10,776 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_command [2022-10-17 17:37:10,776 INFO L130 BoogieDeclarations]: Found specification of procedure pf_probe [2022-10-17 17:37:10,776 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_probe [2022-10-17 17:37:10,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:37:10,777 INFO L130 BoogieDeclarations]: Found specification of procedure pf_identify [2022-10-17 17:37:10,777 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_identify [2022-10-17 17:37:10,777 INFO L130 BoogieDeclarations]: Found specification of procedure pf_sleep [2022-10-17 17:37:10,777 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_sleep [2022-10-17 17:37:10,777 INFO L130 BoogieDeclarations]: Found specification of procedure pf_mode_sense [2022-10-17 17:37:10,778 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_mode_sense [2022-10-17 17:37:10,778 INFO L130 BoogieDeclarations]: Found specification of procedure pi_write_block [2022-10-17 17:37:10,778 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_write_block [2022-10-17 17:37:10,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:37:10,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:37:10,779 INFO L130 BoogieDeclarations]: Found specification of procedure pi_init [2022-10-17 17:37:10,779 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_init [2022-10-17 17:37:10,779 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_regr [2022-10-17 17:37:10,779 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_regr [2022-10-17 17:37:10,779 INFO L130 BoogieDeclarations]: Found specification of procedure pi_connect [2022-10-17 17:37:10,779 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_connect [2022-10-17 17:37:10,780 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2022-10-17 17:37:10,780 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2022-10-17 17:37:10,780 INFO L130 BoogieDeclarations]: Found specification of procedure get_capacity [2022-10-17 17:37:10,780 INFO L138 BoogieDeclarations]: Found implementation of procedure get_capacity [2022-10-17 17:37:10,780 INFO L130 BoogieDeclarations]: Found specification of procedure pf_lock [2022-10-17 17:37:10,780 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_lock [2022-10-17 17:37:10,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:37:10,781 INFO L130 BoogieDeclarations]: Found specification of procedure xl [2022-10-17 17:37:10,781 INFO L138 BoogieDeclarations]: Found implementation of procedure xl [2022-10-17 17:37:10,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:37:10,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:37:10,781 INFO L130 BoogieDeclarations]: Found specification of procedure xs [2022-10-17 17:37:10,782 INFO L138 BoogieDeclarations]: Found implementation of procedure xs [2022-10-17 17:37:10,782 INFO L130 BoogieDeclarations]: Found specification of procedure pf_ioctl [2022-10-17 17:37:10,782 INFO L138 BoogieDeclarations]: Found implementation of procedure pf_ioctl [2022-10-17 17:37:11,135 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:37:11,151 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:37:14,980 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:37:15,486 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:37:15,487 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-10-17 17:37:15,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:37:15 BoogieIcfgContainer [2022-10-17 17:37:15,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:37:15,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:37:15,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:37:15,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:37:15,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:37:08" (1/3) ... [2022-10-17 17:37:15,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac00d41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:37:15, skipping insertion in model container [2022-10-17 17:37:15,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:37:10" (2/3) ... [2022-10-17 17:37:15,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac00d41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:37:15, skipping insertion in model container [2022-10-17 17:37:15,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:37:15" (3/3) ... [2022-10-17 17:37:15,504 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pf.ko-main.cil.out.i [2022-10-17 17:37:15,524 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:37:15,524 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:37:15,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:37:15,628 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;@627c2cc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:37:15,629 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:37:15,637 INFO L276 IsEmpty]: Start isEmpty. Operand has 398 states, 249 states have (on average 1.3775100401606426) internal successors, (343), 263 states have internal predecessors, (343), 112 states have call successors, (112), 37 states have call predecessors, (112), 37 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2022-10-17 17:37:15,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-17 17:37:15,651 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:15,654 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:15,655 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:15,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:15,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1917459288, now seen corresponding path program 1 times [2022-10-17 17:37:15,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:15,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786115184] [2022-10-17 17:37:15,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:15,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:16,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:16,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786115184] [2022-10-17 17:37:16,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786115184] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:16,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:16,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:37:16,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344291319] [2022-10-17 17:37:16,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:16,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:16,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:16,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:16,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:16,390 INFO L87 Difference]: Start difference. First operand has 398 states, 249 states have (on average 1.3775100401606426) internal successors, (343), 263 states have internal predecessors, (343), 112 states have call successors, (112), 37 states have call predecessors, (112), 37 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:17,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:17,539 INFO L93 Difference]: Finished difference Result 1087 states and 1585 transitions. [2022-10-17 17:37:17,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:17,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-10-17 17:37:17,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:17,563 INFO L225 Difference]: With dead ends: 1087 [2022-10-17 17:37:17,563 INFO L226 Difference]: Without dead ends: 686 [2022-10-17 17:37:17,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:17,579 INFO L413 NwaCegarLoop]: 685 mSDtfsCounter, 409 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:17,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 1136 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-17 17:37:17,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-10-17 17:37:17,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 673. [2022-10-17 17:37:17,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 421 states have (on average 1.3562945368171022) internal successors, (571), 434 states have internal predecessors, (571), 187 states have call successors, (187), 65 states have call predecessors, (187), 64 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2022-10-17 17:37:17,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 939 transitions. [2022-10-17 17:37:17,698 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 939 transitions. Word has length 14 [2022-10-17 17:37:17,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:17,699 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 939 transitions. [2022-10-17 17:37:17,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:17,700 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 939 transitions. [2022-10-17 17:37:17,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-17 17:37:17,701 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:17,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:17,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:37:17,702 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:17,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:17,703 INFO L85 PathProgramCache]: Analyzing trace with hash -784782475, now seen corresponding path program 1 times [2022-10-17 17:37:17,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:17,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079874479] [2022-10-17 17:37:17,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:17,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:17,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:17,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079874479] [2022-10-17 17:37:17,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079874479] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:17,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:17,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:37:17,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064120038] [2022-10-17 17:37:17,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:17,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:17,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:17,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:17,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:17,890 INFO L87 Difference]: Start difference. First operand 673 states and 939 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:18,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:18,567 INFO L93 Difference]: Finished difference Result 1345 states and 1877 transitions. [2022-10-17 17:37:18,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:18,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-10-17 17:37:18,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:18,574 INFO L225 Difference]: With dead ends: 1345 [2022-10-17 17:37:18,574 INFO L226 Difference]: Without dead ends: 673 [2022-10-17 17:37:18,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:18,579 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 536 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:18,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 473 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-17 17:37:18,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-10-17 17:37:18,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 673. [2022-10-17 17:37:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 421 states have (on average 1.3515439429928742) internal successors, (569), 434 states have internal predecessors, (569), 187 states have call successors, (187), 65 states have call predecessors, (187), 64 states have return successors, (181), 181 states have call predecessors, (181), 181 states have call successors, (181) [2022-10-17 17:37:18,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 937 transitions. [2022-10-17 17:37:18,654 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 937 transitions. Word has length 15 [2022-10-17 17:37:18,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:18,655 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 937 transitions. [2022-10-17 17:37:18,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:18,655 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 937 transitions. [2022-10-17 17:37:18,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 17:37:18,657 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:18,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:18,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:37:18,658 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:18,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:18,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1354095684, now seen corresponding path program 1 times [2022-10-17 17:37:18,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:18,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235951299] [2022-10-17 17:37:18,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:18,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:18,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:18,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235951299] [2022-10-17 17:37:18,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235951299] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:18,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:18,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:37:18,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035461408] [2022-10-17 17:37:18,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:18,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:18,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:18,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:18,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:18,864 INFO L87 Difference]: Start difference. First operand 673 states and 937 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:37:19,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:19,702 INFO L93 Difference]: Finished difference Result 1516 states and 2090 transitions. [2022-10-17 17:37:19,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:19,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-10-17 17:37:19,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:19,712 INFO L225 Difference]: With dead ends: 1516 [2022-10-17 17:37:19,712 INFO L226 Difference]: Without dead ends: 844 [2022-10-17 17:37:19,715 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 [2022-10-17 17:37:19,719 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 373 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:19,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 959 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-17 17:37:19,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2022-10-17 17:37:19,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 563. [2022-10-17 17:37:19,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 346 states have (on average 1.3381502890173411) internal successors, (463), 358 states have internal predecessors, (463), 157 states have call successors, (157), 60 states have call predecessors, (157), 59 states have return successors, (151), 151 states have call predecessors, (151), 151 states have call successors, (151) [2022-10-17 17:37:19,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 771 transitions. [2022-10-17 17:37:19,784 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 771 transitions. Word has length 16 [2022-10-17 17:37:19,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:19,785 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 771 transitions. [2022-10-17 17:37:19,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:37:19,790 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 771 transitions. [2022-10-17 17:37:19,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-17 17:37:19,796 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:19,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:19,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:37:19,799 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:19,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:19,801 INFO L85 PathProgramCache]: Analyzing trace with hash 427406224, now seen corresponding path program 1 times [2022-10-17 17:37:19,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:19,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511740492] [2022-10-17 17:37:19,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:19,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:19,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:19,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:19,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511740492] [2022-10-17 17:37:19,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511740492] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:19,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:37:19,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:37:19,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190373734] [2022-10-17 17:37:19,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:19,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:19,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:19,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:19,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:37:19,997 INFO L87 Difference]: Start difference. First operand 563 states and 771 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:22,433 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 [] [2022-10-17 17:37:23,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:23,504 INFO L93 Difference]: Finished difference Result 1122 states and 1537 transitions. [2022-10-17 17:37:23,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:23,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-10-17 17:37:23,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:23,509 INFO L225 Difference]: With dead ends: 1122 [2022-10-17 17:37:23,509 INFO L226 Difference]: Without dead ends: 569 [2022-10-17 17:37:23,512 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 [2022-10-17 17:37:23,513 INFO L413 NwaCegarLoop]: 472 mSDtfsCounter, 7 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:23,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 943 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2022-10-17 17:37:23,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-10-17 17:37:23,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 564. [2022-10-17 17:37:23,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 347 states have (on average 1.3371757925072045) internal successors, (464), 359 states have internal predecessors, (464), 157 states have call successors, (157), 60 states have call predecessors, (157), 59 states have return successors, (151), 151 states have call predecessors, (151), 151 states have call successors, (151) [2022-10-17 17:37:23,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 772 transitions. [2022-10-17 17:37:23,554 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 772 transitions. Word has length 21 [2022-10-17 17:37:23,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:23,554 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 772 transitions. [2022-10-17 17:37:23,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:23,554 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 772 transitions. [2022-10-17 17:37:23,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 17:37:23,555 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:23,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:23,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:37:23,556 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:23,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:23,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1626991329, now seen corresponding path program 1 times [2022-10-17 17:37:23,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:23,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874685332] [2022-10-17 17:37:23,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:23,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:23,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:23,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874685332] [2022-10-17 17:37:23,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874685332] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:23,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489421973] [2022-10-17 17:37:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:23,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:23,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:23,761 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:23,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:37:24,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:24,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:37:24,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:24,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:37:24,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489421973] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:24,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:37:24,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-10-17 17:37:24,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931294664] [2022-10-17 17:37:24,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:24,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:24,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:24,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:24,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:24,131 INFO L87 Difference]: Start difference. First operand 564 states and 772 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:25,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:25,062 INFO L93 Difference]: Finished difference Result 1135 states and 1558 transitions. [2022-10-17 17:37:25,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:25,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-10-17 17:37:25,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:25,067 INFO L225 Difference]: With dead ends: 1135 [2022-10-17 17:37:25,068 INFO L226 Difference]: Without dead ends: 581 [2022-10-17 17:37:25,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:25,071 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 14 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:25,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 947 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-17 17:37:25,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-10-17 17:37:25,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 566. [2022-10-17 17:37:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 349 states have (on average 1.335243553008596) internal successors, (466), 361 states have internal predecessors, (466), 157 states have call successors, (157), 60 states have call predecessors, (157), 59 states have return successors, (151), 151 states have call predecessors, (151), 151 states have call successors, (151) [2022-10-17 17:37:25,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 774 transitions. [2022-10-17 17:37:25,109 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 774 transitions. Word has length 24 [2022-10-17 17:37:25,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:25,109 INFO L495 AbstractCegarLoop]: Abstraction has 566 states and 774 transitions. [2022-10-17 17:37:25,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:37:25,110 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 774 transitions. [2022-10-17 17:37:25,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-17 17:37:25,111 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:25,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:25,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:25,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:25,325 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:25,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:25,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1356370932, now seen corresponding path program 1 times [2022-10-17 17:37:25,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:25,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749260070] [2022-10-17 17:37:25,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:25,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:25,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:37:25,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:25,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749260070] [2022-10-17 17:37:25,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749260070] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:25,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375564250] [2022-10-17 17:37:25,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:25,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:25,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:25,564 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:25,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:37:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:25,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 1067 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:37:25,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:25,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:37:25,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375564250] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:25,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:37:25,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-10-17 17:37:25,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65824074] [2022-10-17 17:37:25,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:25,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:25,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:25,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:25,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:25,944 INFO L87 Difference]: Start difference. First operand 566 states and 774 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:37:27,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:27,142 INFO L93 Difference]: Finished difference Result 1250 states and 1746 transitions. [2022-10-17 17:37:27,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:27,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-10-17 17:37:27,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:27,149 INFO L225 Difference]: With dead ends: 1250 [2022-10-17 17:37:27,149 INFO L226 Difference]: Without dead ends: 694 [2022-10-17 17:37:27,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:27,153 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 136 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:27,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 981 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-17 17:37:27,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-10-17 17:37:27,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 581. [2022-10-17 17:37:27,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 360 states have (on average 1.3388888888888888) internal successors, (482), 372 states have internal predecessors, (482), 161 states have call successors, (161), 60 states have call predecessors, (161), 59 states have return successors, (155), 155 states have call predecessors, (155), 155 states have call successors, (155) [2022-10-17 17:37:27,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 798 transitions. [2022-10-17 17:37:27,202 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 798 transitions. Word has length 28 [2022-10-17 17:37:27,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:27,202 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 798 transitions. [2022-10-17 17:37:27,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 17:37:27,203 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 798 transitions. [2022-10-17 17:37:27,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-17 17:37:27,204 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:27,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:27,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:27,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 17:37:27,432 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:27,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:27,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1986472555, now seen corresponding path program 1 times [2022-10-17 17:37:27,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:27,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803131005] [2022-10-17 17:37:27,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:27,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:27,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:27,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803131005] [2022-10-17 17:37:27,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803131005] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:27,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798653126] [2022-10-17 17:37:27,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:27,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:27,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:27,643 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:27,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:37:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:27,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:37:27,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:28,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:28,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:37:28,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798653126] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:28,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:37:28,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-10-17 17:37:28,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123006300] [2022-10-17 17:37:28,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:28,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:28,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:28,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:28,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:28,070 INFO L87 Difference]: Start difference. First operand 581 states and 798 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:37:28,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:28,787 INFO L93 Difference]: Finished difference Result 583 states and 799 transitions. [2022-10-17 17:37:28,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:28,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2022-10-17 17:37:28,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:28,792 INFO L225 Difference]: With dead ends: 583 [2022-10-17 17:37:28,792 INFO L226 Difference]: Without dead ends: 580 [2022-10-17 17:37:28,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:28,794 INFO L413 NwaCegarLoop]: 471 mSDtfsCounter, 511 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:28,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 471 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-17 17:37:28,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-10-17 17:37:28,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2022-10-17 17:37:28,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 360 states have (on average 1.336111111111111) internal successors, (481), 371 states have internal predecessors, (481), 160 states have call successors, (160), 60 states have call predecessors, (160), 59 states have return successors, (155), 155 states have call predecessors, (155), 155 states have call successors, (155) [2022-10-17 17:37:28,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 796 transitions. [2022-10-17 17:37:28,856 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 796 transitions. Word has length 34 [2022-10-17 17:37:28,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:28,857 INFO L495 AbstractCegarLoop]: Abstraction has 580 states and 796 transitions. [2022-10-17 17:37:28,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:37:28,857 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 796 transitions. [2022-10-17 17:37:28,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-10-17 17:37:28,862 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:28,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:28,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:29,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-17 17:37:29,089 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:29,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:29,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1450806518, now seen corresponding path program 1 times [2022-10-17 17:37:29,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:29,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934613106] [2022-10-17 17:37:29,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:29,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:29,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:29,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:29,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934613106] [2022-10-17 17:37:29,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934613106] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:29,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092372827] [2022-10-17 17:37:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:29,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:29,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:29,273 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:29,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:37:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:29,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:37:29,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:29,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:37:29,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092372827] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:29,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:37:29,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-10-17 17:37:29,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257917138] [2022-10-17 17:37:29,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:29,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:29,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:29,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:29,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:29,691 INFO L87 Difference]: Start difference. First operand 580 states and 796 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:37:30,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:30,109 INFO L93 Difference]: Finished difference Result 582 states and 797 transitions. [2022-10-17 17:37:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:30,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-10-17 17:37:30,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:30,114 INFO L225 Difference]: With dead ends: 582 [2022-10-17 17:37:30,115 INFO L226 Difference]: Without dead ends: 579 [2022-10-17 17:37:30,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:30,116 INFO L413 NwaCegarLoop]: 469 mSDtfsCounter, 508 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:30,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 469 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:37:30,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-10-17 17:37:30,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 579. [2022-10-17 17:37:30,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 360 states have (on average 1.3333333333333333) internal successors, (480), 370 states have internal predecessors, (480), 159 states have call successors, (159), 60 states have call predecessors, (159), 59 states have return successors, (155), 155 states have call predecessors, (155), 155 states have call successors, (155) [2022-10-17 17:37:30,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 794 transitions. [2022-10-17 17:37:30,165 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 794 transitions. Word has length 35 [2022-10-17 17:37:30,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:30,166 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 794 transitions. [2022-10-17 17:37:30,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:37:30,166 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 794 transitions. [2022-10-17 17:37:30,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-10-17 17:37:30,167 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:30,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:30,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:30,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:30,380 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:30,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:30,381 INFO L85 PathProgramCache]: Analyzing trace with hash 2025033422, now seen corresponding path program 1 times [2022-10-17 17:37:30,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:30,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203651911] [2022-10-17 17:37:30,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:30,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:30,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:30,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:30,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203651911] [2022-10-17 17:37:30,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203651911] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:30,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018136477] [2022-10-17 17:37:30,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:30,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:30,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:30,542 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:30,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 17:37:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:30,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:37:30,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:30,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:37:30,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018136477] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:30,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:37:30,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-10-17 17:37:30,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756193605] [2022-10-17 17:37:30,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:30,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:30,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:30,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:30,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:30,964 INFO L87 Difference]: Start difference. First operand 579 states and 794 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:37:31,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:31,533 INFO L93 Difference]: Finished difference Result 581 states and 795 transitions. [2022-10-17 17:37:31,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:31,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2022-10-17 17:37:31,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:31,538 INFO L225 Difference]: With dead ends: 581 [2022-10-17 17:37:31,539 INFO L226 Difference]: Without dead ends: 578 [2022-10-17 17:37:31,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:31,540 INFO L413 NwaCegarLoop]: 467 mSDtfsCounter, 505 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:31,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 467 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 17:37:31,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-10-17 17:37:31,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2022-10-17 17:37:31,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 360 states have (on average 1.3305555555555555) internal successors, (479), 369 states have internal predecessors, (479), 158 states have call successors, (158), 60 states have call predecessors, (158), 59 states have return successors, (155), 155 states have call predecessors, (155), 155 states have call successors, (155) [2022-10-17 17:37:31,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 792 transitions. [2022-10-17 17:37:31,596 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 792 transitions. Word has length 36 [2022-10-17 17:37:31,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:31,596 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 792 transitions. [2022-10-17 17:37:31,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:37:31,596 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 792 transitions. [2022-10-17 17:37:31,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-17 17:37:31,597 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:31,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:37:31,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:31,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:31,825 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:31,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:31,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1648764167, now seen corresponding path program 1 times [2022-10-17 17:37:31,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:31,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529267130] [2022-10-17 17:37:31,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:31,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:31,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:31,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529267130] [2022-10-17 17:37:31,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529267130] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:31,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036668642] [2022-10-17 17:37:31,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:31,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:31,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:31,985 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:32,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 17:37:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:32,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:37:32,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:37:32,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:37:32,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036668642] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:37:32,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:37:32,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-10-17 17:37:32,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861559413] [2022-10-17 17:37:32,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:37:32,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:37:32,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:37:32,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:37:32,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:32,405 INFO L87 Difference]: Start difference. First operand 578 states and 792 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:37:33,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:37:33,213 INFO L93 Difference]: Finished difference Result 582 states and 794 transitions. [2022-10-17 17:37:33,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:37:33,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-10-17 17:37:33,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:37:33,218 INFO L225 Difference]: With dead ends: 582 [2022-10-17 17:37:33,218 INFO L226 Difference]: Without dead ends: 558 [2022-10-17 17:37:33,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:37:33,219 INFO L413 NwaCegarLoop]: 597 mSDtfsCounter, 448 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:37:33,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 809 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-17 17:37:33,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-10-17 17:37:33,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2022-10-17 17:37:33,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 347 states have (on average 1.3256484149855907) internal successors, (460), 354 states have internal predecessors, (460), 153 states have call successors, (153), 58 states have call predecessors, (153), 57 states have return successors, (152), 152 states have call predecessors, (152), 152 states have call successors, (152) [2022-10-17 17:37:33,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 765 transitions. [2022-10-17 17:37:33,272 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 765 transitions. Word has length 37 [2022-10-17 17:37:33,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:37:33,272 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 765 transitions. [2022-10-17 17:37:33,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:37:33,272 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 765 transitions. [2022-10-17 17:37:33,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-10-17 17:37:33,274 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:37:33,275 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-17 17:37:33,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 17:37:33,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-17 17:37:33,501 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:37:33,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:37:33,501 INFO L85 PathProgramCache]: Analyzing trace with hash 96432501, now seen corresponding path program 1 times [2022-10-17 17:37:33,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:37:33,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864570755] [2022-10-17 17:37:33,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:33,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:37:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:33,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:37:33,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864570755] [2022-10-17 17:37:33,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864570755] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:37:33,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26430188] [2022-10-17 17:37:33,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:37:33,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:37:33,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:37:33,732 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:37:33,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_624777a5-1ca8-47d8-818e-2139f2baaadd/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 17:37:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:37:34,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:37:34,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:37:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:34,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:37:34,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:37:34,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26430188] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:37:34,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1156500805] [2022-10-17 17:37:34,200 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2022-10-17 17:37:34,201 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:37:34,210 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:37:34,215 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:37:34,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:37:35,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 402 treesize of output 338 [2022-10-17 17:37:36,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 374 [2022-10-17 17:37:36,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:37:36,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 21 select indices, 21 select index equivalence classes, 253 disjoint index pairs (out of 210 index pairs), introduced 21 new quantified variables, introduced 0 case distinctions, treesize of input 1114 treesize of output 952