./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee11f7e-32d0-4460-80fd-443c8fb15fd5/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee11f7e-32d0-4460-80fd-443c8fb15fd5/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee11f7e-32d0-4460-80fd-443c8fb15fd5/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee11f7e-32d0-4460-80fd-443c8fb15fd5/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee11f7e-32d0-4460-80fd-443c8fb15fd5/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee11f7e-32d0-4460-80fd-443c8fb15fd5/bin/utaipan-G1rejxKTta --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:38:24,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:38:24,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:38:24,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:38:24,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:38:24,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:38:24,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:38:24,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:38:24,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:38:24,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:38:24,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:38:24,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:38:24,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:38:24,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:38:24,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:38:24,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:38:24,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:38:24,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:38:24,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:38:24,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:38:24,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:38:24,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:38:24,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:38:24,703 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:38:24,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:38:24,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:38:24,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:38:24,711 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:38:24,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:38:24,713 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:38:24,713 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:38:24,714 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:38:24,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:38:24,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:38:24,717 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:38:24,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:38:24,718 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:38:24,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:38:24,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:38:24,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:38:24,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:38:24,722 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee11f7e-32d0-4460-80fd-443c8fb15fd5/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:38:24,747 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:38:24,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:38:24,748 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:38:24,748 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:38:24,749 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:38:24,749 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:38:24,749 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:38:24,750 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:38:24,750 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:38:24,750 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:38:24,751 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:38:24,758 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:38:24,758 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:38:24,759 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:38:24,759 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:38:24,759 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:38:24,759 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:38:24,759 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:38:24,760 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:38:24,760 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:38:24,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:38:24,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:38:24,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:38:24,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:38:24,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:38:24,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:38:24,762 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:38:24,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:38:24,762 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:38:24,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:38:24,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:38:24,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:38:24,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:38:24,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:38:24,764 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:38:24,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:38:24,764 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:38:24,765 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:38:24,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:38:24,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:38:24,765 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:38:24,765 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_3ee11f7e-32d0-4460-80fd-443c8fb15fd5/bin/utaipan-G1rejxKTta/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee11f7e-32d0-4460-80fd-443c8fb15fd5/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2022-10-17 17:38:25,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:38:25,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:38:25,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:38:25,066 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:38:25,067 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:38:25,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee11f7e-32d0-4460-80fd-443c8fb15fd5/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-10-17 17:38:25,153 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee11f7e-32d0-4460-80fd-443c8fb15fd5/bin/utaipan-G1rejxKTta/data/76cb7fa05/837907988718420dac065941ea2495bb/FLAG981697468 [2022-10-17 17:38:26,035 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:38:26,038 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee11f7e-32d0-4460-80fd-443c8fb15fd5/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-10-17 17:38:26,098 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee11f7e-32d0-4460-80fd-443c8fb15fd5/bin/utaipan-G1rejxKTta/data/76cb7fa05/837907988718420dac065941ea2495bb/FLAG981697468 [2022-10-17 17:38:26,540 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee11f7e-32d0-4460-80fd-443c8fb15fd5/bin/utaipan-G1rejxKTta/data/76cb7fa05/837907988718420dac065941ea2495bb [2022-10-17 17:38:26,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:38:26,545 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:38:26,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:38:26,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:38:26,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:38:26,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:38:26" (1/1) ... [2022-10-17 17:38:26,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53f7c98f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:26, skipping insertion in model container [2022-10-17 17:38:26,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:38:26" (1/1) ... [2022-10-17 17:38:26,560 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:38:26,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:38:27,581 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee11f7e-32d0-4460-80fd-443c8fb15fd5/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-10-17 17:38:28,098 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:38:28,154 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:38:28,238 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee11f7e-32d0-4460-80fd-443c8fb15fd5/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-10-17 17:38:28,616 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:38:28,683 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:38:28,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:28 WrapperNode [2022-10-17 17:38:28,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:38:28,685 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:38:28,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:38:28,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:38:28,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:28" (1/1) ... [2022-10-17 17:38:28,867 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:28" (1/1) ... [2022-10-17 17:38:29,065 INFO L138 Inliner]: procedures = 128, calls = 2887, calls flagged for inlining = 37, calls inlined = 26, statements flattened = 3086 [2022-10-17 17:38:29,066 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:38:29,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:38:29,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:38:29,068 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:38:29,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:28" (1/1) ... [2022-10-17 17:38:29,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:28" (1/1) ... [2022-10-17 17:38:29,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:28" (1/1) ... [2022-10-17 17:38:29,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:28" (1/1) ... [2022-10-17 17:38:29,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:28" (1/1) ... [2022-10-17 17:38:29,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:28" (1/1) ... [2022-10-17 17:38:29,291 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:28" (1/1) ... [2022-10-17 17:38:29,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:28" (1/1) ... [2022-10-17 17:38:29,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:38:29,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:38:29,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:38:29,343 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:38:29,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:28" (1/1) ... [2022-10-17 17:38:29,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:38:29,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee11f7e-32d0-4460-80fd-443c8fb15fd5/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:29,381 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee11f7e-32d0-4460-80fd-443c8fb15fd5/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:38:29,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ee11f7e-32d0-4460-80fd-443c8fb15fd5/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:38:29,438 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2022-10-17 17:38:29,438 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2022-10-17 17:38:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-10-17 17:38:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-10-17 17:38:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-10-17 17:38:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:38:29,439 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-10-17 17:38:29,439 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-10-17 17:38:29,440 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-10-17 17:38:29,440 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-10-17 17:38:29,440 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-10-17 17:38:29,440 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-10-17 17:38:29,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:38:29,440 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-10-17 17:38:29,441 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-10-17 17:38:29,441 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-10-17 17:38:29,441 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-10-17 17:38:29,441 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2022-10-17 17:38:29,441 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2022-10-17 17:38:29,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-10-17 17:38:29,442 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-10-17 17:38:29,442 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-10-17 17:38:29,442 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-10-17 17:38:29,442 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-10-17 17:38:29,442 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-10-17 17:38:29,443 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2022-10-17 17:38:29,443 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2022-10-17 17:38:29,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:38:29,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:38:29,443 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-10-17 17:38:29,444 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-10-17 17:38:29,444 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2022-10-17 17:38:29,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2022-10-17 17:38:29,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:38:29,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:38:29,444 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-10-17 17:38:29,445 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-10-17 17:38:29,445 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:38:29,445 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-10-17 17:38:29,446 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-10-17 17:38:29,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:38:29,446 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-10-17 17:38:29,446 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-10-17 17:38:29,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-10-17 17:38:29,447 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-10-17 17:38:29,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:38:29,448 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2022-10-17 17:38:29,449 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2022-10-17 17:38:29,449 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2022-10-17 17:38:29,450 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2022-10-17 17:38:29,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-10-17 17:38:29,450 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2022-10-17 17:38:29,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2022-10-17 17:38:29,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:38:29,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:38:30,131 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:38:30,134 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:38:30,193 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 17:38:30,213 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-10-17 17:38:30,213 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-10-17 17:38:30,218 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 17:38:30,442 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-10-17 17:38:30,442 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-10-17 17:38:30,488 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 17:38:30,511 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-10-17 17:38:30,511 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-10-17 17:38:30,640 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 17:38:30,675 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-10-17 17:38:30,675 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-10-17 17:38:30,676 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 17:38:30,677 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 17:38:30,677 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 17:38:30,814 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2022-10-17 17:38:30,814 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-10-17 17:38:30,814 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-10-17 17:38:30,815 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2022-10-17 17:38:30,815 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-10-17 17:38:30,815 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-10-17 17:38:30,818 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 17:38:30,832 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 17:38:30,836 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 17:38:31,776 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-10-17 17:38:31,776 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-10-17 17:38:31,777 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2022-10-17 17:38:31,777 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2022-10-17 17:38:31,777 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##124: assume !false; [2022-10-17 17:38:31,777 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##123: assume false; [2022-10-17 17:38:31,810 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 17:38:31,853 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-10-17 17:38:31,853 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-10-17 17:38:31,866 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 17:38:31,868 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 17:38:31,869 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 17:38:31,872 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 17:38:31,872 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 17:38:31,876 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 17:38:31,877 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 17:38:31,879 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-10-17 17:38:36,072 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !false; [2022-10-17 17:38:36,073 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume false; [2022-10-17 17:38:36,073 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##76: assume false; [2022-10-17 17:38:36,073 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##177: assume !false; [2022-10-17 17:38:36,073 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##176: assume false; [2022-10-17 17:38:36,073 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##77: assume !false; [2022-10-17 17:38:36,073 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2022-10-17 17:38:36,073 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2022-10-17 17:38:36,074 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume !false; [2022-10-17 17:38:36,074 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume false; [2022-10-17 17:38:36,074 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##162: assume false; [2022-10-17 17:38:36,074 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume !false; [2022-10-17 17:38:36,074 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##210: assume false; [2022-10-17 17:38:36,074 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##211: assume !false; [2022-10-17 17:38:36,074 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##108: assume !false; [2022-10-17 17:38:36,074 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##107: assume false; [2022-10-17 17:38:36,096 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:38:36,981 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:38:36,981 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-17 17:38:36,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:38:36 BoogieIcfgContainer [2022-10-17 17:38:36,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:38:36,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:38:36,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:38:36,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:38:37,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:38:26" (1/3) ... [2022-10-17 17:38:37,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671f30e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:38:37, skipping insertion in model container [2022-10-17 17:38:37,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:28" (2/3) ... [2022-10-17 17:38:37,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@671f30e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:38:37, skipping insertion in model container [2022-10-17 17:38:37,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:38:36" (3/3) ... [2022-10-17 17:38:37,003 INFO L112 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-3.c [2022-10-17 17:38:37,029 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:38:37,030 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:38:37,132 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:38:37,140 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;@79c0ad10, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:38:37,140 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:38:37,149 INFO L276 IsEmpty]: Start isEmpty. Operand has 422 states, 305 states have (on average 1.5540983606557377) internal successors, (474), 338 states have internal predecessors, (474), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2022-10-17 17:38:37,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-17 17:38:37,158 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:37,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:37,160 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:37,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:37,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1290694348, now seen corresponding path program 1 times [2022-10-17 17:38:37,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:37,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33997108] [2022-10-17 17:38:37,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:37,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:38,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:38,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33997108] [2022-10-17 17:38:38,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33997108] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:38,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:38,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:38:38,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983642682] [2022-10-17 17:38:38,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:38,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:38:38,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:38,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:38:38,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:38,587 INFO L87 Difference]: Start difference. First operand has 422 states, 305 states have (on average 1.5540983606557377) internal successors, (474), 338 states have internal predecessors, (474), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:38:41,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:38:44,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:38:45,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:45,378 INFO L93 Difference]: Finished difference Result 1034 states and 1688 transitions. [2022-10-17 17:38:45,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:38:45,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-10-17 17:38:45,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:45,413 INFO L225 Difference]: With dead ends: 1034 [2022-10-17 17:38:45,414 INFO L226 Difference]: Without dead ends: 664 [2022-10-17 17:38:45,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:45,431 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 461 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 27 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:45,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 1039 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 236 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2022-10-17 17:38:45,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-10-17 17:38:45,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 645. [2022-10-17 17:38:45,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 486 states have (on average 1.5020576131687242) internal successors, (730), 514 states have internal predecessors, (730), 125 states have call successors, (125), 37 states have call predecessors, (125), 33 states have return successors, (122), 101 states have call predecessors, (122), 110 states have call successors, (122) [2022-10-17 17:38:45,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 977 transitions. [2022-10-17 17:38:45,595 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 977 transitions. Word has length 20 [2022-10-17 17:38:45,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:45,596 INFO L495 AbstractCegarLoop]: Abstraction has 645 states and 977 transitions. [2022-10-17 17:38:45,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:38:45,596 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 977 transitions. [2022-10-17 17:38:45,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-17 17:38:45,599 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:45,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:45,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:38:45,601 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:45,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:45,602 INFO L85 PathProgramCache]: Analyzing trace with hash -399447408, now seen corresponding path program 1 times [2022-10-17 17:38:45,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:45,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560713395] [2022-10-17 17:38:45,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:45,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:45,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:45,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560713395] [2022-10-17 17:38:45,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560713395] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:45,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:45,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:38:45,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145843542] [2022-10-17 17:38:45,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:45,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:38:45,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:45,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:38:45,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:45,993 INFO L87 Difference]: Start difference. First operand 645 states and 977 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:38:47,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:38:50,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:38:50,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:50,800 INFO L93 Difference]: Finished difference Result 668 states and 1004 transitions. [2022-10-17 17:38:50,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:38:50,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-10-17 17:38:50,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:50,808 INFO L225 Difference]: With dead ends: 668 [2022-10-17 17:38:50,808 INFO L226 Difference]: Without dead ends: 650 [2022-10-17 17:38:50,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:50,811 INFO L413 NwaCegarLoop]: 542 mSDtfsCounter, 11 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:50,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1036 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 172 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-10-17 17:38:50,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-10-17 17:38:50,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 650. [2022-10-17 17:38:50,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 489 states have (on average 1.4989775051124745) internal successors, (733), 517 states have internal predecessors, (733), 125 states have call successors, (125), 39 states have call predecessors, (125), 35 states have return successors, (122), 101 states have call predecessors, (122), 110 states have call successors, (122) [2022-10-17 17:38:50,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 980 transitions. [2022-10-17 17:38:50,861 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 980 transitions. Word has length 20 [2022-10-17 17:38:50,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:50,861 INFO L495 AbstractCegarLoop]: Abstraction has 650 states and 980 transitions. [2022-10-17 17:38:50,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:38:50,862 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 980 transitions. [2022-10-17 17:38:50,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-17 17:38:50,865 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:50,865 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] [2022-10-17 17:38:50,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:38:50,866 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:50,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:50,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1093357139, now seen corresponding path program 1 times [2022-10-17 17:38:50,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:50,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578802959] [2022-10-17 17:38:50,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:50,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:51,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:51,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578802959] [2022-10-17 17:38:51,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578802959] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:51,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:51,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:38:51,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115514947] [2022-10-17 17:38:51,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:51,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:38:51,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:51,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:38:51,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:51,528 INFO L87 Difference]: Start difference. First operand 650 states and 980 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 17:38:53,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:38:56,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:38:58,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:38:58,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:58,906 INFO L93 Difference]: Finished difference Result 1117 states and 1711 transitions. [2022-10-17 17:38:58,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:38:58,907 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), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-10-17 17:38:58,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:58,917 INFO L225 Difference]: With dead ends: 1117 [2022-10-17 17:38:58,917 INFO L226 Difference]: Without dead ends: 1098 [2022-10-17 17:38:58,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:58,920 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 569 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:58,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 975 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 2 Unknown, 0 Unchecked, 7.3s Time] [2022-10-17 17:38:58,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2022-10-17 17:38:58,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 1074. [2022-10-17 17:38:58,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 819 states have (on average 1.5177045177045176) internal successors, (1243), 859 states have internal predecessors, (1243), 195 states have call successors, (195), 64 states have call predecessors, (195), 59 states have return successors, (217), 164 states have call predecessors, (217), 180 states have call successors, (217) [2022-10-17 17:38:58,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 1655 transitions. [2022-10-17 17:38:58,996 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 1655 transitions. Word has length 30 [2022-10-17 17:38:58,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:58,997 INFO L495 AbstractCegarLoop]: Abstraction has 1074 states and 1655 transitions. [2022-10-17 17:38:58,997 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), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 17:38:58,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 1655 transitions. [2022-10-17 17:38:59,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-17 17:38:59,000 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:59,000 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] [2022-10-17 17:38:59,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:38:59,001 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:59,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:59,001 INFO L85 PathProgramCache]: Analyzing trace with hash -214362645, now seen corresponding path program 1 times [2022-10-17 17:38:59,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:59,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954894879] [2022-10-17 17:38:59,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:59,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:59,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:59,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954894879] [2022-10-17 17:38:59,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954894879] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:59,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:59,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:38:59,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735354328] [2022-10-17 17:38:59,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:59,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:38:59,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:59,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:38:59,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:59,396 INFO L87 Difference]: Start difference. First operand 1074 states and 1655 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)