./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/Mono6_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/Mono6_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh --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 d34109ac38ddcd69eb693c43509c1355293ac88c80ebd192d8e2af9a8be8f805 --- 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-2329fc7 [2022-12-14 13:44:13,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:44:13,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:44:13,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:44:13,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:44:13,931 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:44:13,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:44:13,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:44:13,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:44:13,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:44:13,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:44:13,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:44:13,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:44:13,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:44:13,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:44:13,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:44:13,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:44:13,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:44:13,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:44:13,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:44:13,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:44:13,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:44:13,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:44:13,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:44:13,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:44:13,948 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:44:13,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:44:13,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:44:13,950 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:44:13,951 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:44:13,951 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:44:13,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:44:13,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:44:13,952 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:44:13,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:44:13,953 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:44:13,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:44:13,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:44:13,954 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:44:13,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:44:13,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:44:13,956 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:44:13,984 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:44:13,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:44:13,984 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:44:13,984 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:44:13,985 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:44:13,985 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:44:13,985 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:44:13,986 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:44:13,986 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:44:13,986 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:44:13,986 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:44:13,986 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:44:13,986 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:44:13,987 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:44:13,987 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:44:13,987 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:44:13,987 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:44:13,987 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:44:13,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:44:13,988 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:44:13,988 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:44:13,988 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:44:13,989 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:44:13,989 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:44:13,989 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:44:13,989 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:44:13,989 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:44:13,989 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:44:13,989 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:44:13,990 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:44:13,990 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:44:13,990 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:44:13,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:44:13,998 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:44:13,998 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:44:13,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:44:13,998 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:44:13,998 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:44:13,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:44:13,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:44:13,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:44:13,998 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_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d34109ac38ddcd69eb693c43509c1355293ac88c80ebd192d8e2af9a8be8f805 [2022-12-14 13:44:14,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:44:14,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:44:14,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:44:14,176 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:44:14,176 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:44:14,177 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/loops-crafted-1/Mono6_1.c [2022-12-14 13:44:16,701 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:44:16,830 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:44:16,830 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/sv-benchmarks/c/loops-crafted-1/Mono6_1.c [2022-12-14 13:44:16,834 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/data/88077a6d4/b674c8f2ee0d4b76b5101f13cd85e116/FLAG1984e384e [2022-12-14 13:44:17,257 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/data/88077a6d4/b674c8f2ee0d4b76b5101f13cd85e116 [2022-12-14 13:44:17,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:44:17,261 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:44:17,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:44:17,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:44:17,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:44:17,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:44:17" (1/1) ... [2022-12-14 13:44:17,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ef4bcce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:17, skipping insertion in model container [2022-12-14 13:44:17,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:44:17" (1/1) ... [2022-12-14 13:44:17,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:44:17,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:44:17,429 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_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/sv-benchmarks/c/loops-crafted-1/Mono6_1.c[311,324] [2022-12-14 13:44:17,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:44:17,450 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:44:17,461 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_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/sv-benchmarks/c/loops-crafted-1/Mono6_1.c[311,324] [2022-12-14 13:44:17,463 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:44:17,476 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:44:17,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:17 WrapperNode [2022-12-14 13:44:17,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:44:17,478 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:44:17,478 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:44:17,478 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:44:17,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:17" (1/1) ... [2022-12-14 13:44:17,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:17" (1/1) ... [2022-12-14 13:44:17,505 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2022-12-14 13:44:17,505 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:44:17,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:44:17,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:44:17,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:44:17,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:17" (1/1) ... [2022-12-14 13:44:17,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:17" (1/1) ... [2022-12-14 13:44:17,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:17" (1/1) ... [2022-12-14 13:44:17,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:17" (1/1) ... [2022-12-14 13:44:17,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:17" (1/1) ... [2022-12-14 13:44:17,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:17" (1/1) ... [2022-12-14 13:44:17,522 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:17" (1/1) ... [2022-12-14 13:44:17,523 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:17" (1/1) ... [2022-12-14 13:44:17,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:44:17,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:44:17,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:44:17,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:44:17,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:17" (1/1) ... [2022-12-14 13:44:17,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:44:17,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:44:17,553 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:44:17,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:44:17,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:44:17,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:44:17,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:44:17,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:44:17,648 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:44:17,649 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:44:17,724 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:44:17,752 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:44:17,752 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 13:44:17,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:44:17 BoogieIcfgContainer [2022-12-14 13:44:17,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:44:17,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:44:17,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:44:17,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:44:17,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:44:17" (1/3) ... [2022-12-14 13:44:17,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76710719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:44:17, skipping insertion in model container [2022-12-14 13:44:17,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:44:17" (2/3) ... [2022-12-14 13:44:17,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76710719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:44:17, skipping insertion in model container [2022-12-14 13:44:17,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:44:17" (3/3) ... [2022-12-14 13:44:17,761 INFO L112 eAbstractionObserver]: Analyzing ICFG Mono6_1.c [2022-12-14 13:44:17,776 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:44:17,776 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:44:17,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:44:17,817 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;@3cb001c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:44:17,818 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:44:17,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:44:17,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 13:44:17,825 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:44:17,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 13:44:17,826 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:44:17,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:44:17,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2065030, now seen corresponding path program 1 times [2022-12-14 13:44:17,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:44:17,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312768605] [2022-12-14 13:44:17,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:44:17,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:44:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:44:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:44:18,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:44:18,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312768605] [2022-12-14 13:44:18,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312768605] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:44:18,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:44:18,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:44:18,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968507579] [2022-12-14 13:44:18,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:44:18,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:44:18,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:44:18,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:44:18,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:44:18,091 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:44:18,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:44:18,116 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2022-12-14 13:44:18,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:44:18,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 13:44:18,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:44:18,123 INFO L225 Difference]: With dead ends: 13 [2022-12-14 13:44:18,123 INFO L226 Difference]: Without dead ends: 6 [2022-12-14 13:44:18,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:44:18,128 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:44:18,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:44:18,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2022-12-14 13:44:18,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2022-12-14 13:44:18,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:44:18,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2022-12-14 13:44:18,153 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2022-12-14 13:44:18,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:44:18,153 INFO L495 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2022-12-14 13:44:18,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:44:18,154 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2022-12-14 13:44:18,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 13:44:18,154 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:44:18,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 13:44:18,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:44:18,154 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:44:18,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:44:18,155 INFO L85 PathProgramCache]: Analyzing trace with hash 64119683, now seen corresponding path program 1 times [2022-12-14 13:44:18,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:44:18,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597522198] [2022-12-14 13:44:18,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:44:18,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:44:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:44:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:44:18,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:44:18,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597522198] [2022-12-14 13:44:18,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597522198] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:44:18,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665611898] [2022-12-14 13:44:18,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:44:18,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:44:18,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:44:18,293 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:44:18,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:44:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:44:18,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 13:44:18,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:44:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:44:18,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:44:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:44:18,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665611898] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:44:18,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [139405602] [2022-12-14 13:44:18,537 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 13:44:18,537 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:44:18,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:44:18,546 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:44:18,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:44:18,765 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:44:18,853 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '71#(and (not (< (mod |ULTIMATE.start_main_~x~0#1| 4294967296) (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start_main_~y~0#1| 10000000) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 5000000 |ULTIMATE.start_main_~z~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:44:18,853 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:44:18,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:44:18,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 8 [2022-12-14 13:44:18,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960008340] [2022-12-14 13:44:18,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:44:18,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 13:44:18,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:44:18,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 13:44:18,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:44:18,857 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:44:18,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:44:18,954 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2022-12-14 13:44:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:44:18,955 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 13:44:18,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:44:18,955 INFO L225 Difference]: With dead ends: 13 [2022-12-14 13:44:18,955 INFO L226 Difference]: Without dead ends: 9 [2022-12-14 13:44:18,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-12-14 13:44:18,956 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:44:18,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:44:18,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-12-14 13:44:18,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-12-14 13:44:18,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:44:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-12-14 13:44:18,959 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-12-14 13:44:18,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:44:18,959 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-12-14 13:44:18,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:44:18,960 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-12-14 13:44:18,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 13:44:18,960 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:44:18,960 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2022-12-14 13:44:18,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:44:19,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:44:19,161 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:44:19,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:44:19,162 INFO L85 PathProgramCache]: Analyzing trace with hash -967943738, now seen corresponding path program 2 times [2022-12-14 13:44:19,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:44:19,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165296997] [2022-12-14 13:44:19,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:44:19,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:44:19,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:44:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:44:19,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:44:19,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165296997] [2022-12-14 13:44:19,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165296997] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:44:19,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64179176] [2022-12-14 13:44:19,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:44:19,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:44:19,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:44:19,363 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:44:19,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:44:19,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:44:19,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:44:19,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 13:44:19,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:44:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:44:19,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:44:21,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:44:22,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64179176] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:44:22,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1530403548] [2022-12-14 13:44:22,002 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 13:44:22,002 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:44:22,002 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:44:22,003 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:44:22,003 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:44:22,063 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:44:22,515 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '171#(and (not (< (mod |ULTIMATE.start_main_~x~0#1| 4294967296) (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start_main_~y~0#1| 10000000) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 5000000 |ULTIMATE.start_main_~z~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:44:22,515 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:44:22,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:44:22,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2022-12-14 13:44:22,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908303379] [2022-12-14 13:44:22,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:44:22,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 13:44:22,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:44:22,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 13:44:22,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-12-14 13:44:22,517 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:44:28,743 WARN L233 SmtUtils]: Spent 5.69s on a formula simplification. DAG size of input: 102 DAG size of output: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:44:41,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:44:41,388 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-12-14 13:44:41,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 13:44:41,388 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 13:44:41,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:44:41,389 INFO L225 Difference]: With dead ends: 23 [2022-12-14 13:44:41,389 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 13:44:41,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 13:44:41,390 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:44:41,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 23 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:44:41,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 13:44:41,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-14 13:44:41,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:44:41,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-12-14 13:44:41,397 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2022-12-14 13:44:41,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:44:41,397 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-12-14 13:44:41,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:44:41,397 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-12-14 13:44:41,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 13:44:41,398 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:44:41,398 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2022-12-14 13:44:41,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:44:41,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:44:41,600 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:44:41,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:44:41,601 INFO L85 PathProgramCache]: Analyzing trace with hash -313388890, now seen corresponding path program 3 times [2022-12-14 13:44:41,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:44:41,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031102278] [2022-12-14 13:44:41,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:44:41,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:44:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:44:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:44:41,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:44:41,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031102278] [2022-12-14 13:44:41,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031102278] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:44:41,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62473865] [2022-12-14 13:44:41,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:44:41,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:44:41,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:44:41,859 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:44:41,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db4d5e7-b5f8-4927-9649-c62e5fbc9c0c/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:44:41,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:44:41,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:44:41,945 WARN L261 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 13:44:41,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:44:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:44:42,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:45:26,964 WARN L233 SmtUtils]: Spent 5.08s on a formula simplification that was a NOOP. DAG size: 195 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:45:26,967 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:45:26,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62473865] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:45:26,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [241115819] [2022-12-14 13:45:26,969 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 13:45:26,970 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:45:26,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:45:26,970 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:45:26,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:45:27,019 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:45:27,755 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '377#(and (not (< (mod |ULTIMATE.start_main_~x~0#1| 4294967296) (mod |ULTIMATE.start_main_~y~0#1| 4294967296))) (= |ULTIMATE.start_main_~y~0#1| 10000000) (<= 0 |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= (mod |ULTIMATE.start_main_~x~0#1| 4294967296) (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 5000000 |ULTIMATE.start_main_~z~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:45:27,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:45:27,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:45:27,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 36 [2022-12-14 13:45:27,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543356773] [2022-12-14 13:45:27,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:45:27,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 13:45:27,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:27,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 13:45:27,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 13:45:27,758 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 37 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:52:30,997 WARN L233 SmtUtils]: Spent 6.96m on a formula simplification. DAG size of input: 398 DAG size of output: 218 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:59:39,805 WARN L233 SmtUtils]: Spent 6.96m on a formula simplification. DAG size of input: 400 DAG size of output: 220 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 13:59:41,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []