./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1ad6d1ed8310d8e3264189ac87472d58c77647a0c63d75779b5974e889987542 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:06:19,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:06:19,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:06:19,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:06:19,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:06:19,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:06:19,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:06:19,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:06:19,873 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:06:19,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:06:19,876 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:06:19,877 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:06:19,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:06:19,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:06:19,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:06:19,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:06:19,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:06:19,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:06:19,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:06:19,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:06:19,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:06:19,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:06:19,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:06:19,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:06:19,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:06:19,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:06:19,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:06:19,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:06:19,924 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:06:19,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:06:19,925 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:06:19,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:06:19,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:06:19,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:06:19,934 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:06:19,934 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:06:19,935 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:06:19,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:06:19,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:06:19,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:06:19,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:06:19,938 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-23 14:06:19,995 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:06:19,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:06:19,996 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:06:19,997 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:06:19,997 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:06:19,998 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:06:19,998 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:06:19,998 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:06:19,998 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:06:19,999 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:06:20,000 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:06:20,000 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:06:20,000 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:06:20,000 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:06:20,001 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:06:20,001 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:06:20,001 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:06:20,001 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:06:20,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:06:20,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:06:20,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:06:20,003 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:06:20,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:06:20,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:06:20,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:06:20,004 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:06:20,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:06:20,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:06:20,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:06:20,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:06:20,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:06:20,006 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:06:20,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:06:20,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:06:20,006 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:06:20,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:06:20,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:06:20,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:06:20,007 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_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ad6d1ed8310d8e3264189ac87472d58c77647a0c63d75779b5974e889987542 [2022-11-23 14:06:20,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:06:20,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:06:20,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:06:20,345 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:06:20,348 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:06:20,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i [2022-11-23 14:06:23,436 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:06:23,922 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:06:23,923 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i [2022-11-23 14:06:23,951 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/data/a9fdab17c/e571186c9582436484baae488ca50b8c/FLAG8c983fbb1 [2022-11-23 14:06:23,967 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/data/a9fdab17c/e571186c9582436484baae488ca50b8c [2022-11-23 14:06:23,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:06:23,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:06:23,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:06:23,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:06:23,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:06:23,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:06:23" (1/1) ... [2022-11-23 14:06:23,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bf0b72f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:23, skipping insertion in model container [2022-11-23 14:06:23,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:06:23" (1/1) ... [2022-11-23 14:06:23,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:06:24,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:06:25,249 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i[168201,168214] [2022-11-23 14:06:25,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:06:25,469 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:06:25,814 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i[168201,168214] [2022-11-23 14:06:25,843 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:06:26,123 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:06:26,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26 WrapperNode [2022-11-23 14:06:26,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:06:26,125 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:06:26,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:06:26,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:06:26,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (1/1) ... [2022-11-23 14:06:26,259 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (1/1) ... [2022-11-23 14:06:26,436 INFO L138 Inliner]: procedures = 115, calls = 2153, calls flagged for inlining = 45, calls inlined = 37, statements flattened = 5373 [2022-11-23 14:06:26,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:06:26,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:06:26,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:06:26,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:06:26,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (1/1) ... [2022-11-23 14:06:26,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (1/1) ... [2022-11-23 14:06:26,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (1/1) ... [2022-11-23 14:06:26,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (1/1) ... [2022-11-23 14:06:26,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (1/1) ... [2022-11-23 14:06:26,606 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (1/1) ... [2022-11-23 14:06:26,629 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (1/1) ... [2022-11-23 14:06:26,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (1/1) ... [2022-11-23 14:06:26,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:06:26,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:06:26,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:06:26,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:06:26,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (1/1) ... [2022-11-23 14:06:26,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:06:26,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:26,710 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:06:26,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:06:26,765 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_set_limit [2022-11-23 14:06:26,765 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_set_limit [2022-11-23 14:06:26,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:06:26,766 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_remove_group [2022-11-23 14:06:26,766 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_remove_group [2022-11-23 14:06:26,766 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_get_clientdata [2022-11-23 14:06:26,766 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_get_clientdata [2022-11-23 14:06:26,767 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_show_limit [2022-11-23 14:06:26,767 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_show_limit [2022-11-23 14:06:26,767 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_update_device [2022-11-23 14:06:26,767 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_update_device [2022-11-23 14:06:26,767 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_show_input [2022-11-23 14:06:26,767 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_show_input [2022-11-23 14:06:26,768 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_read_adc [2022-11-23 14:06:26,768 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_read_adc [2022-11-23 14:06:26,768 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 14:06:26,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 14:06:26,768 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_update_lock_of_max16065_data [2022-11-23 14:06:26,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_update_lock_of_max16065_data [2022-11-23 14:06:26,769 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_show_alarm [2022-11-23 14:06:26,769 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_show_alarm [2022-11-23 14:06:26,769 INFO L130 BoogieDeclarations]: Found specification of procedure LIMIT_TO_MV [2022-11-23 14:06:26,769 INFO L138 BoogieDeclarations]: Found implementation of procedure LIMIT_TO_MV [2022-11-23 14:06:26,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:06:26,770 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-11-23 14:06:26,771 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-11-23 14:06:26,771 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-23 14:06:26,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-23 14:06:26,772 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-23 14:06:26,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-23 14:06:26,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:06:26,773 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-11-23 14:06:26,773 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-11-23 14:06:26,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:06:26,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 14:06:26,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:06:26,774 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_update_lock_of_max16065_data [2022-11-23 14:06:26,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_update_lock_of_max16065_data [2022-11-23 14:06:26,774 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_read_byte_data [2022-11-23 14:06:26,775 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_read_byte_data [2022-11-23 14:06:26,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 14:06:26,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:06:26,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 14:06:26,775 INFO L130 BoogieDeclarations]: Found specification of procedure max16065_cleanup [2022-11-23 14:06:26,775 INFO L138 BoogieDeclarations]: Found implementation of procedure max16065_cleanup [2022-11-23 14:06:26,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:06:26,776 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_write_byte_data [2022-11-23 14:06:26,776 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_write_byte_data [2022-11-23 14:06:26,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:06:26,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:06:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_create_file [2022-11-23 14:06:26,777 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_create_file [2022-11-23 14:06:26,778 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-11-23 14:06:26,779 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-11-23 14:06:27,696 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:06:27,699 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:06:34,185 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:06:37,138 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:06:37,138 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 14:06:37,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:06:37 BoogieIcfgContainer [2022-11-23 14:06:37,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:06:37,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:06:37,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:06:37,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:06:37,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:06:23" (1/3) ... [2022-11-23 14:06:37,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be9be36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:06:37, skipping insertion in model container [2022-11-23 14:06:37,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:26" (2/3) ... [2022-11-23 14:06:37,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1be9be36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:06:37, skipping insertion in model container [2022-11-23 14:06:37,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:06:37" (3/3) ... [2022-11-23 14:06:37,159 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--hwmon--max16065.ko-main.cil.out.i [2022-11-23 14:06:37,179 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:06:37,179 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:06:37,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:06:37,287 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;@182d752d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:06:37,288 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:06:37,300 INFO L276 IsEmpty]: Start isEmpty. Operand has 875 states, 670 states have (on average 1.6761194029850746) internal successors, (1123), 677 states have internal predecessors, (1123), 182 states have call successors, (182), 21 states have call predecessors, (182), 21 states have return successors, (182), 182 states have call predecessors, (182), 182 states have call successors, (182) [2022-11-23 14:06:37,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 14:06:37,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:37,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:37,334 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:37,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:37,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1412755381, now seen corresponding path program 1 times [2022-11-23 14:06:37,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:37,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947316925] [2022-11-23 14:06:37,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:37,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:38,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:38,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947316925] [2022-11-23 14:06:38,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947316925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:38,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:38,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:06:38,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709099307] [2022-11-23 14:06:38,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:38,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:38,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:38,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:38,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:38,575 INFO L87 Difference]: Start difference. First operand has 875 states, 670 states have (on average 1.6761194029850746) internal successors, (1123), 677 states have internal predecessors, (1123), 182 states have call successors, (182), 21 states have call predecessors, (182), 21 states have return successors, (182), 182 states have call predecessors, (182), 182 states have call successors, (182) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:06:39,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:39,575 INFO L93 Difference]: Finished difference Result 2616 states and 4611 transitions. [2022-11-23 14:06:39,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:39,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-11-23 14:06:39,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:39,599 INFO L225 Difference]: With dead ends: 2616 [2022-11-23 14:06:39,599 INFO L226 Difference]: Without dead ends: 1738 [2022-11-23 14:06:39,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:39,613 INFO L413 NwaCegarLoop]: 1530 mSDtfsCounter, 1462 mSDsluCounter, 1351 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 2881 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:39,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1462 Valid, 2881 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:06:39,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2022-11-23 14:06:39,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1725. [2022-11-23 14:06:39,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1327 states have (on average 1.6744536548605877) internal successors, (2222), 1332 states have internal predecessors, (2222), 357 states have call successors, (357), 41 states have call predecessors, (357), 40 states have return successors, (351), 351 states have call predecessors, (351), 351 states have call successors, (351) [2022-11-23 14:06:39,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 2930 transitions. [2022-11-23 14:06:39,773 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 2930 transitions. Word has length 29 [2022-11-23 14:06:39,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:39,773 INFO L495 AbstractCegarLoop]: Abstraction has 1725 states and 2930 transitions. [2022-11-23 14:06:39,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:06:39,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 2930 transitions. [2022-11-23 14:06:39,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 14:06:39,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:39,777 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] [2022-11-23 14:06:39,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:06:39,778 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:39,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:39,778 INFO L85 PathProgramCache]: Analyzing trace with hash -449019590, now seen corresponding path program 1 times [2022-11-23 14:06:39,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:39,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444787832] [2022-11-23 14:06:39,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:39,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:40,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:40,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444787832] [2022-11-23 14:06:40,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444787832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:40,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:40,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:06:40,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517475135] [2022-11-23 14:06:40,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:40,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:40,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:40,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:40,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:40,320 INFO L87 Difference]: Start difference. First operand 1725 states and 2930 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:06:41,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:41,044 INFO L93 Difference]: Finished difference Result 5164 states and 8772 transitions. [2022-11-23 14:06:41,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:41,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-11-23 14:06:41,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:41,075 INFO L225 Difference]: With dead ends: 5164 [2022-11-23 14:06:41,075 INFO L226 Difference]: Without dead ends: 3440 [2022-11-23 14:06:41,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:41,088 INFO L413 NwaCegarLoop]: 1535 mSDtfsCounter, 1459 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 2885 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:41,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1459 Valid, 2885 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:06:41,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2022-11-23 14:06:41,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 3427. [2022-11-23 14:06:41,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 2640 states have (on average 1.6742424242424243) internal successors, (4420), 2645 states have internal predecessors, (4420), 706 states have call successors, (706), 81 states have call predecessors, (706), 80 states have return successors, (700), 700 states have call predecessors, (700), 700 states have call successors, (700) [2022-11-23 14:06:41,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 5826 transitions. [2022-11-23 14:06:41,369 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 5826 transitions. Word has length 30 [2022-11-23 14:06:41,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:41,370 INFO L495 AbstractCegarLoop]: Abstraction has 3427 states and 5826 transitions. [2022-11-23 14:06:41,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:06:41,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 5826 transitions. [2022-11-23 14:06:41,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 14:06:41,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:41,372 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] [2022-11-23 14:06:41,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:06:41,373 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:41,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:41,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1884621832, now seen corresponding path program 1 times [2022-11-23 14:06:41,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:41,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655170036] [2022-11-23 14:06:41,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:41,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:41,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:41,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655170036] [2022-11-23 14:06:41,679 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-23 14:06:41,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557824561] [2022-11-23 14:06:41,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:41,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:41,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:41,686 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:06:41,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:06:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:43,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 6814 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:06:43,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:43,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:43,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557824561] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:43,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:43,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:06:43,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490699298] [2022-11-23 14:06:43,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:43,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:43,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:43,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:43,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:43,540 INFO L87 Difference]: Start difference. First operand 3427 states and 5826 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:06:44,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:44,488 INFO L93 Difference]: Finished difference Result 10262 states and 17450 transitions. [2022-11-23 14:06:44,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:44,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2022-11-23 14:06:44,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:44,527 INFO L225 Difference]: With dead ends: 10262 [2022-11-23 14:06:44,527 INFO L226 Difference]: Without dead ends: 6836 [2022-11-23 14:06:44,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:44,544 INFO L413 NwaCegarLoop]: 1537 mSDtfsCounter, 1460 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1460 SdHoareTripleChecker+Valid, 2884 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:44,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1460 Valid, 2884 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:06:44,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6836 states. [2022-11-23 14:06:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6836 to 6823. [2022-11-23 14:06:44,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6823 states, 5264 states have (on average 1.6740121580547112) internal successors, (8812), 5269 states have internal predecessors, (8812), 1398 states have call successors, (1398), 161 states have call predecessors, (1398), 160 states have return successors, (1392), 1392 states have call predecessors, (1392), 1392 states have call successors, (1392) [2022-11-23 14:06:44,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6823 states to 6823 states and 11602 transitions. [2022-11-23 14:06:44,895 INFO L78 Accepts]: Start accepts. Automaton has 6823 states and 11602 transitions. Word has length 30 [2022-11-23 14:06:44,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:44,896 INFO L495 AbstractCegarLoop]: Abstraction has 6823 states and 11602 transitions. [2022-11-23 14:06:44,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:06:44,896 INFO L276 IsEmpty]: Start isEmpty. Operand 6823 states and 11602 transitions. [2022-11-23 14:06:44,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 14:06:44,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:44,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:06:44,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:45,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:45,116 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:45,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:45,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1257728099, now seen corresponding path program 1 times [2022-11-23 14:06:45,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:45,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197928280] [2022-11-23 14:06:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:45,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:45,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:45,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197928280] [2022-11-23 14:06:45,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-23 14:06:45,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570893091] [2022-11-23 14:06:45,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:45,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:45,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:45,538 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:06:45,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:06:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:47,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 6810 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:06:47,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:47,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:47,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570893091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:47,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:47,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:06:47,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941305146] [2022-11-23 14:06:47,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:47,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:47,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:47,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:47,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:47,495 INFO L87 Difference]: Start difference. First operand 6823 states and 11602 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:06:48,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:48,985 INFO L93 Difference]: Finished difference Result 20434 states and 34754 transitions. [2022-11-23 14:06:48,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:48,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-11-23 14:06:48,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:49,103 INFO L225 Difference]: With dead ends: 20434 [2022-11-23 14:06:49,104 INFO L226 Difference]: Without dead ends: 13612 [2022-11-23 14:06:49,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:49,149 INFO L413 NwaCegarLoop]: 1543 mSDtfsCounter, 1462 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 2890 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:49,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1462 Valid, 2890 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 14:06:49,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13612 states. [2022-11-23 14:06:49,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13612 to 13599. [2022-11-23 14:06:50,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13599 states, 10504 states have (on average 1.6736481340441736) internal successors, (17580), 10509 states have internal predecessors, (17580), 2774 states have call successors, (2774), 321 states have call predecessors, (2774), 320 states have return successors, (2768), 2768 states have call predecessors, (2768), 2768 states have call successors, (2768) [2022-11-23 14:06:50,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13599 states to 13599 states and 23122 transitions. [2022-11-23 14:06:50,094 INFO L78 Accepts]: Start accepts. Automaton has 13599 states and 23122 transitions. Word has length 28 [2022-11-23 14:06:50,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:50,094 INFO L495 AbstractCegarLoop]: Abstraction has 13599 states and 23122 transitions. [2022-11-23 14:06:50,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:06:50,096 INFO L276 IsEmpty]: Start isEmpty. Operand 13599 states and 23122 transitions. [2022-11-23 14:06:50,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-23 14:06:50,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:50,099 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] [2022-11-23 14:06:50,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:50,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-23 14:06:50,315 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:50,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:50,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2057948822, now seen corresponding path program 1 times [2022-11-23 14:06:50,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:50,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821331587] [2022-11-23 14:06:50,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:50,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:50,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:50,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821331587] [2022-11-23 14:06:50,584 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-23 14:06:50,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659921858] [2022-11-23 14:06:50,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:50,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:50,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:50,587 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:06:50,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:06:52,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:52,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 6816 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:06:52,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:52,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:52,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659921858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:52,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:52,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:06:52,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963335405] [2022-11-23 14:06:52,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:52,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:52,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:52,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:52,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:52,255 INFO L87 Difference]: Start difference. First operand 13599 states and 23122 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:06:54,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:06:55,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:06:55,592 INFO L93 Difference]: Finished difference Result 40570 states and 69746 transitions. [2022-11-23 14:06:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:06:55,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-11-23 14:06:55,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:06:55,755 INFO L225 Difference]: With dead ends: 40570 [2022-11-23 14:06:55,756 INFO L226 Difference]: Without dead ends: 26972 [2022-11-23 14:06:55,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:55,819 INFO L413 NwaCegarLoop]: 1554 mSDtfsCounter, 1442 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 2901 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:06:55,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1489 Valid, 2901 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-23 14:06:55,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26972 states. [2022-11-23 14:06:57,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26972 to 26959. [2022-11-23 14:06:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26959 states, 20904 states have (on average 1.6752774588595485) internal successors, (35020), 20909 states have internal predecessors, (35020), 5414 states have call successors, (5414), 641 states have call predecessors, (5414), 640 states have return successors, (6144), 5408 states have call predecessors, (6144), 5408 states have call successors, (6144) [2022-11-23 14:06:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26959 states to 26959 states and 46578 transitions. [2022-11-23 14:06:57,633 INFO L78 Accepts]: Start accepts. Automaton has 26959 states and 46578 transitions. Word has length 31 [2022-11-23 14:06:57,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:06:57,633 INFO L495 AbstractCegarLoop]: Abstraction has 26959 states and 46578 transitions. [2022-11-23 14:06:57,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:06:57,634 INFO L276 IsEmpty]: Start isEmpty. Operand 26959 states and 46578 transitions. [2022-11-23 14:06:57,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 14:06:57,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:06:57,636 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] [2022-11-23 14:06:57,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:06:57,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:57,851 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:06:57,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:06:57,851 INFO L85 PathProgramCache]: Analyzing trace with hash 288230743, now seen corresponding path program 1 times [2022-11-23 14:06:57,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:06:57,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631968460] [2022-11-23 14:06:57,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:57,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:06:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:58,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:06:58,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631968460] [2022-11-23 14:06:58,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-23 14:06:58,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45932305] [2022-11-23 14:06:58,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:06:58,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:06:58,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:06:58,124 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:06:58,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:06:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:06:59,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 6824 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:06:59,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:06:59,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:06:59,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:06:59,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45932305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:06:59,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:06:59,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:06:59,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780250324] [2022-11-23 14:06:59,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:06:59,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:06:59,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:06:59,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:06:59,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:06:59,775 INFO L87 Difference]: Start difference. First operand 26959 states and 46578 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:07:03,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:03,331 INFO L93 Difference]: Finished difference Result 80746 states and 139522 transitions. [2022-11-23 14:07:03,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:07:03,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2022-11-23 14:07:03,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:03,732 INFO L225 Difference]: With dead ends: 80746 [2022-11-23 14:07:03,733 INFO L226 Difference]: Without dead ends: 53788 [2022-11-23 14:07:03,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:03,868 INFO L413 NwaCegarLoop]: 1560 mSDtfsCounter, 1455 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1455 SdHoareTripleChecker+Valid, 2907 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:03,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1455 Valid, 2907 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-23 14:07:03,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53788 states. [2022-11-23 14:07:07,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53788 to 53775. [2022-11-23 14:07:07,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53775 states, 41736 states have (on average 1.6748131109833237) internal successors, (69900), 41741 states have internal predecessors, (69900), 10758 states have call successors, (10758), 1281 states have call predecessors, (10758), 1280 states have return successors, (12208), 10752 states have call predecessors, (12208), 10752 states have call successors, (12208) [2022-11-23 14:07:07,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53775 states to 53775 states and 92866 transitions. [2022-11-23 14:07:07,618 INFO L78 Accepts]: Start accepts. Automaton has 53775 states and 92866 transitions. Word has length 35 [2022-11-23 14:07:07,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:07,618 INFO L495 AbstractCegarLoop]: Abstraction has 53775 states and 92866 transitions. [2022-11-23 14:07:07,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:07:07,619 INFO L276 IsEmpty]: Start isEmpty. Operand 53775 states and 92866 transitions. [2022-11-23 14:07:07,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 14:07:07,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:07,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:07,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:07,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:07,839 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:07,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:07,839 INFO L85 PathProgramCache]: Analyzing trace with hash -62778927, now seen corresponding path program 1 times [2022-11-23 14:07:07,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:07,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465134465] [2022-11-23 14:07:07,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:07,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:08,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:08,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465134465] [2022-11-23 14:07:08,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-23 14:07:08,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665508601] [2022-11-23 14:07:08,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:08,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:08,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:08,273 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:07:08,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:07:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:09,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 6812 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:07:09,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:10,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:07:10,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665508601] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:10,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:10,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:07:10,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218794522] [2022-11-23 14:07:10,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:10,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:07:10,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:10,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:07:10,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:10,029 INFO L87 Difference]: Start difference. First operand 53775 states and 92866 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:07:14,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 14:07:15,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:15,448 INFO L93 Difference]: Finished difference Result 160746 states and 279122 transitions. [2022-11-23 14:07:15,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:07:15,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2022-11-23 14:07:15,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:16,291 INFO L225 Difference]: With dead ends: 160746 [2022-11-23 14:07:16,291 INFO L226 Difference]: Without dead ends: 106972 [2022-11-23 14:07:16,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:16,811 INFO L413 NwaCegarLoop]: 1554 mSDtfsCounter, 1444 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1491 SdHoareTripleChecker+Valid, 2901 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:16,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1491 Valid, 2901 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-11-23 14:07:16,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106972 states. [2022-11-23 14:07:22,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106972 to 106959. [2022-11-23 14:07:22,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106959 states, 83208 states have (on average 1.6753677531006634) internal successors, (139404), 83213 states have internal predecessors, (139404), 21190 states have call successors, (21190), 2561 states have call predecessors, (21190), 2560 states have return successors, (25520), 21184 states have call predecessors, (25520), 21184 states have call successors, (25520) [2022-11-23 14:07:23,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106959 states to 106959 states and 186114 transitions. [2022-11-23 14:07:23,318 INFO L78 Accepts]: Start accepts. Automaton has 106959 states and 186114 transitions. Word has length 29 [2022-11-23 14:07:23,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:23,321 INFO L495 AbstractCegarLoop]: Abstraction has 106959 states and 186114 transitions. [2022-11-23 14:07:23,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:07:23,321 INFO L276 IsEmpty]: Start isEmpty. Operand 106959 states and 186114 transitions. [2022-11-23 14:07:23,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 14:07:23,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:23,323 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] [2022-11-23 14:07:23,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:23,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5efcfc-60c9-49e7-8392-cd21aa985b14/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:23,545 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:23,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:23,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1001559948, now seen corresponding path program 1 times [2022-11-23 14:07:23,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:23,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250745929] [2022-11-23 14:07:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:23,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:23,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:24,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:24,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:24,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250745929] [2022-11-23 14:07:24,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250745929] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:24,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:24,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:07:24,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159144601] [2022-11-23 14:07:24,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:24,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:07:24,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:24,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:07:24,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:24,121 INFO L87 Difference]: Start difference. First operand 106959 states and 186114 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:07:33,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:33,512 INFO L93 Difference]: Finished difference Result 320362 states and 557442 transitions. [2022-11-23 14:07:33,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:07:33,512 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-11-23 14:07:33,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:34,880 INFO L225 Difference]: With dead ends: 320362 [2022-11-23 14:07:34,881 INFO L226 Difference]: Without dead ends: 213404 [2022-11-23 14:07:35,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:35,304 INFO L413 NwaCegarLoop]: 1627 mSDtfsCounter, 1456 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1456 SdHoareTripleChecker+Valid, 2977 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:35,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1456 Valid, 2977 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-23 14:07:36,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213404 states. [2022-11-23 14:07:46,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213404 to 213391. [2022-11-23 14:07:46,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213391 states, 166024 states have (on average 1.6746253553703079) internal successors, (278028), 166029 states have internal predecessors, (278028), 42246 states have call successors, (42246), 5121 states have call predecessors, (42246), 5120 states have return successors, (50912), 42240 states have call predecessors, (50912), 42240 states have call successors, (50912) [2022-11-23 14:07:47,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213391 states to 213391 states and 371186 transitions. [2022-11-23 14:07:48,611 INFO L78 Accepts]: Start accepts. Automaton has 213391 states and 371186 transitions. Word has length 33 [2022-11-23 14:07:48,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:48,612 INFO L495 AbstractCegarLoop]: Abstraction has 213391 states and 371186 transitions. [2022-11-23 14:07:48,612 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:07:48,612 INFO L276 IsEmpty]: Start isEmpty. Operand 213391 states and 371186 transitions. [2022-11-23 14:07:48,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 14:07:48,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:48,631 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] [2022-11-23 14:07:48,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:07:48,631 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:07:48,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:48,640 INFO L85 PathProgramCache]: Analyzing trace with hash -412111768, now seen corresponding path program 1 times [2022-11-23 14:07:48,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:48,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163234967] [2022-11-23 14:07:48,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:48,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:49,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:49,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163234967] [2022-11-23 14:07:49,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163234967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:49,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:49,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:07:49,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513757265] [2022-11-23 14:07:49,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:49,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:07:49,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:49,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:07:49,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:49,116 INFO L87 Difference]: Start difference. First operand 213391 states and 371186 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)