./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_4.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_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/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_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/partial_mod_count_limited_4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/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_6893b056-fb06-4a19-b82d-915d1697c6ee/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 66c26537aa176e76686ba25b67c86aedfbccc400319942d9855c43a2b470a76b --- 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 11:03:50,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:03:50,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:03:50,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:03:50,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:03:50,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:03:50,423 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:03:50,424 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:03:50,425 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:03:50,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:03:50,426 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:03:50,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:03:50,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:03:50,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:03:50,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:03:50,429 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:03:50,429 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:03:50,430 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:03:50,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:03:50,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:03:50,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:03:50,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:03:50,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:03:50,435 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:03:50,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:03:50,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:03:50,438 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:03:50,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:03:50,439 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:03:50,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:03:50,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:03:50,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:03:50,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:03:50,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:03:50,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:03:50,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:03:50,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:03:50,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:03:50,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:03:50,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:03:50,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:03:50,444 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 11:03:50,458 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:03:50,459 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:03:50,459 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:03:50,459 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:03:50,460 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:03:50,460 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:03:50,460 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:03:50,460 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:03:50,460 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:03:50,460 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:03:50,461 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:03:50,461 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:03:50,461 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:03:50,461 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:03:50,461 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:03:50,461 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:03:50,462 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:03:50,462 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:03:50,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:03:50,462 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:03:50,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:03:50,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:03:50,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:03:50,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 11:03:50,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:03:50,463 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 11:03:50,463 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:03:50,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 11:03:50,464 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:03:50,464 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 11:03:50,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:03:50,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:03:50,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:03:50,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:03:50,465 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:03:50,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:03:50,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 11:03:50,465 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:03:50,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:03:50,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 11:03:50,465 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:03:50,466 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_6893b056-fb06-4a19-b82d-915d1697c6ee/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66c26537aa176e76686ba25b67c86aedfbccc400319942d9855c43a2b470a76b [2022-12-14 11:03:50,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:03:50,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:03:50,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:03:50,646 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:03:50,646 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:03:50,647 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-programs/partial_mod_count_limited_4.c [2022-12-14 11:03:53,302 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:03:53,462 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:03:53,463 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/sv-benchmarks/c/array-programs/partial_mod_count_limited_4.c [2022-12-14 11:03:53,467 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/data/791f94d62/2aa9b364dfec45df83d25a150da20b74/FLAGa1dc86d09 [2022-12-14 11:03:53,480 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/data/791f94d62/2aa9b364dfec45df83d25a150da20b74 [2022-12-14 11:03:53,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:03:53,484 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:03:53,486 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:03:53,486 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:03:53,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:03:53,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:03:53" (1/1) ... [2022-12-14 11:03:53,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8b497d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:03:53, skipping insertion in model container [2022-12-14 11:03:53,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:03:53" (1/1) ... [2022-12-14 11:03:53,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:03:53,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:03:53,603 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_6893b056-fb06-4a19-b82d-915d1697c6ee/sv-benchmarks/c/array-programs/partial_mod_count_limited_4.c[331,344] [2022-12-14 11:03:53,618 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:03:53,624 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:03:53,632 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_6893b056-fb06-4a19-b82d-915d1697c6ee/sv-benchmarks/c/array-programs/partial_mod_count_limited_4.c[331,344] [2022-12-14 11:03:53,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:03:53,647 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:03:53,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:03:53 WrapperNode [2022-12-14 11:03:53,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:03:53,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:03:53,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:03:53,648 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:03:53,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:03:53" (1/1) ... [2022-12-14 11:03:53,658 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:03:53" (1/1) ... [2022-12-14 11:03:53,672 INFO L138 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2022-12-14 11:03:53,672 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:03:53,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:03:53,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:03:53,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:03:53,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:03:53" (1/1) ... [2022-12-14 11:03:53,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:03:53" (1/1) ... [2022-12-14 11:03:53,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:03:53" (1/1) ... [2022-12-14 11:03:53,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:03:53" (1/1) ... [2022-12-14 11:03:53,685 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:03:53" (1/1) ... [2022-12-14 11:03:53,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:03:53" (1/1) ... [2022-12-14 11:03:53,688 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:03:53" (1/1) ... [2022-12-14 11:03:53,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:03:53" (1/1) ... [2022-12-14 11:03:53,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:03:53,691 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:03:53,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:03:53,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:03:53,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:03:53" (1/1) ... [2022-12-14 11:03:53,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:03:53,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:03:53,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:03:53,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:03:53,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:03:53,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:03:53,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 11:03:53,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 11:03:53,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:03:53,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:03:53,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 11:03:53,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 11:03:53,797 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:03:53,799 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:03:53,914 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:03:53,969 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:03:53,970 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 11:03:53,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:03:53 BoogieIcfgContainer [2022-12-14 11:03:53,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:03:53,973 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:03:53,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:03:53,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:03:53,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:03:53" (1/3) ... [2022-12-14 11:03:53,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c3aee80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:03:53, skipping insertion in model container [2022-12-14 11:03:53,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:03:53" (2/3) ... [2022-12-14 11:03:53,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c3aee80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:03:53, skipping insertion in model container [2022-12-14 11:03:53,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:03:53" (3/3) ... [2022-12-14 11:03:53,978 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_4.c [2022-12-14 11:03:53,992 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:03:53,993 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 11:03:54,029 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:03:54,034 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;@5c5feb45, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:03:54,034 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 11:03:54,037 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 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 11:03:54,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 11:03:54,041 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:03:54,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 11:03:54,042 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:03:54,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:03:54,046 INFO L85 PathProgramCache]: Analyzing trace with hash 113225757, now seen corresponding path program 1 times [2022-12-14 11:03:54,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:03:54,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076358857] [2022-12-14 11:03:54,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:03:54,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:03:54,113 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:03:54,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893038449] [2022-12-14 11:03:54,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:03:54,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:03:54,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:03:54,115 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:03:54,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:03:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:03:54,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:03:54,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:03:54,227 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 11:03:54,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:03:54,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:03:54,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076358857] [2022-12-14 11:03:54,228 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:03:54,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893038449] [2022-12-14 11:03:54,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893038449] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:03:54,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:03:54,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:03:54,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792728721] [2022-12-14 11:03:54,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:03:54,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:03:54,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:03:54,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:03:54,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:03:54,256 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 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 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 11:03:54,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:03:54,289 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2022-12-14 11:03:54,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:03:54,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 11:03:54,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:03:54,297 INFO L225 Difference]: With dead ends: 15 [2022-12-14 11:03:54,298 INFO L226 Difference]: Without dead ends: 8 [2022-12-14 11:03:54,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:03:54,302 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:03:54,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:03:54,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-12-14 11:03:54,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-12-14 11:03:54,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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 11:03:54,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-12-14 11:03:54,336 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2022-12-14 11:03:54,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:03:54,337 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-12-14 11:03:54,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 11:03:54,337 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-12-14 11:03:54,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 11:03:54,338 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:03:54,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 11:03:54,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:03:54,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 11:03:54,539 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:03:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:03:54,540 INFO L85 PathProgramCache]: Analyzing trace with hash -777643133, now seen corresponding path program 1 times [2022-12-14 11:03:54,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:03:54,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034568099] [2022-12-14 11:03:54,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:03:54,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:03:54,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:03:54,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623257744] [2022-12-14 11:03:54,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:03:54,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:03:54,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:03:54,558 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:03:54,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:03:54,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:03:54,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:03:54,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:03:54,675 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 11:03:54,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:03:54,694 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 11:03:54,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:03:54,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034568099] [2022-12-14 11:03:54,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:03:54,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623257744] [2022-12-14 11:03:54,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623257744] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:03:54,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [86656791] [2022-12-14 11:03:54,709 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 11:03:54,709 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:03:54,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:03:54,716 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:03:54,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:03:54,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:03:54,809 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:03:54,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:03:54,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:03:54,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:03:54,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:03:54,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:03:54,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 142 [2022-12-14 11:03:54,922 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:03:55,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:03:55,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-12-14 11:03:55,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 11:03:55,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 11:03:55,201 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:03:55,221 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:03:55,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 11:03:55,258 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:03:55,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 11:03:55,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:03:55,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-12-14 11:03:55,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 11:03:55,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 11:03:55,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-12-14 11:03:55,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 11:03:55,423 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:03:55,443 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:03:55,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [86656791] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:03:55,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:03:55,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 8 [2022-12-14 11:03:55,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628336117] [2022-12-14 11:03:55,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:03:55,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:03:55,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:03:55,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:03:55,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:03:55,640 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 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 11:03:55,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:03:55,696 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2022-12-14 11:03:55,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:03:55,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 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) Word has length 6 [2022-12-14 11:03:55,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:03:55,697 INFO L225 Difference]: With dead ends: 13 [2022-12-14 11:03:55,697 INFO L226 Difference]: Without dead ends: 11 [2022-12-14 11:03:55,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:03:55,698 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:03:55,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 7 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:03:55,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-12-14 11:03:55,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2022-12-14 11:03:55,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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 11:03:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-12-14 11:03:55,701 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-12-14 11:03:55,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:03:55,702 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-12-14 11:03:55,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 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 11:03:55,702 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-12-14 11:03:55,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 11:03:55,702 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:03:55,702 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:03:55,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:03:55,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 11:03:55,903 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:03:55,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:03:55,904 INFO L85 PathProgramCache]: Analyzing trace with hash 292223012, now seen corresponding path program 1 times [2022-12-14 11:03:55,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:03:55,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644596481] [2022-12-14 11:03:55,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:03:55,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:03:55,910 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:03:55,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724168401] [2022-12-14 11:03:55,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:03:55,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:03:55,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:03:55,911 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:03:55,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:03:55,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:03:55,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:03:55,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:03:55,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:03:55,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:03:55,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:03:55,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:03:55,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644596481] [2022-12-14 11:03:55,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:03:55,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724168401] [2022-12-14 11:03:55,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724168401] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:03:55,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [955872072] [2022-12-14 11:03:55,992 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 11:03:55,992 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:03:55,992 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:03:55,993 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:03:55,993 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:03:56,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:03:56,029 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 11:03:56,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 11:03:56,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:03:56,067 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:03:56,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:03:56,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:03:56,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:03:56,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 168 [2022-12-14 11:03:56,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:03:56,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:03:56,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 67 [2022-12-14 11:03:56,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 11:03:56,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:03:56,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-12-14 11:03:56,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 11:03:56,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 11:03:56,285 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:03:56,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-12-14 11:03:56,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 11:03:56,427 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:03:56,785 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '180#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~lim~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~lim~0#1| 2147483648)) (= ~N~0 1000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:03:56,785 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:03:56,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:03:56,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-12-14 11:03:56,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087829427] [2022-12-14 11:03:56,786 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:03:56,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:03:56,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:03:56,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:03:56,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:03:56,787 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 11:03:56,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:03:56,809 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-12-14 11:03:56,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:03:56,810 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 9 [2022-12-14 11:03:56,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:03:56,810 INFO L225 Difference]: With dead ends: 20 [2022-12-14 11:03:56,810 INFO L226 Difference]: Without dead ends: 13 [2022-12-14 11:03:56,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:03:56,811 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:03:56,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:03:56,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-14 11:03:56,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-12-14 11:03:56,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 11:03:56,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-12-14 11:03:56,817 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2022-12-14 11:03:56,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:03:56,817 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-12-14 11:03:56,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 11:03:56,817 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-12-14 11:03:56,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 11:03:56,817 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:03:56,818 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 11:03:56,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 11:03:57,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-14 11:03:57,018 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:03:57,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:03:57,019 INFO L85 PathProgramCache]: Analyzing trace with hash 286903242, now seen corresponding path program 2 times [2022-12-14 11:03:57,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:03:57,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697899916] [2022-12-14 11:03:57,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:03:57,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:03:57,028 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:03:57,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712094126] [2022-12-14 11:03:57,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:03:57,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:03:57,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:03:57,029 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:03:57,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:03:57,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 11:03:57,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:03:57,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 11:03:57,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:03:57,336 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:03:57,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 74 [2022-12-14 11:03:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:03:57,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:03:57,682 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:03:57,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 120 [2022-12-14 11:03:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:03:58,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:03:58,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697899916] [2022-12-14 11:03:58,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:03:58,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712094126] [2022-12-14 11:03:58,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712094126] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:03:58,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1609239847] [2022-12-14 11:03:58,273 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 11:03:58,273 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:03:58,273 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:03:58,273 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:03:58,273 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:03:58,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:03:58,310 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:03:58,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:03:58,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:03:58,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:03:58,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:03:58,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:03:58,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 142 [2022-12-14 11:03:58,364 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:03:58,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:03:58,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-12-14 11:03:58,455 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:03:58,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 11:03:58,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 11:03:58,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 11:03:58,525 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:03:58,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:03:58,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-12-14 11:03:58,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 11:03:58,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 11:03:58,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 11:03:58,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 11:03:58,638 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:03:58,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 11:03:58,766 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:03:59,148 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '310#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~lim~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~lim~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= 4 |ULTIMATE.start_main_~R~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000 ~N~0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 1000) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:03:59,149 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:03:59,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:03:59,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-14 11:03:59,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811223147] [2022-12-14 11:03:59,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:03:59,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 11:03:59,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:03:59,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 11:03:59,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-12-14 11:03:59,150 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 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 11:04:01,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 11:04:02,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:04:02,780 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-12-14 11:04:02,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:04:02,780 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 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 12 [2022-12-14 11:04:02,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:04:02,781 INFO L225 Difference]: With dead ends: 26 [2022-12-14 11:04:02,781 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 11:04:02,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-12-14 11:04:02,782 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 14 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:04:02,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 10 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 2 Unknown, 0 Unchecked, 3.2s Time] [2022-12-14 11:04:02,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 11:04:02,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-12-14 11:04:02,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 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 11:04:02,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-12-14 11:04:02,786 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 12 [2022-12-14 11:04:02,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:04:02,786 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-12-14 11:04:02,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 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 11:04:02,787 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-12-14 11:04:02,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 11:04:02,787 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:04:02,787 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1] [2022-12-14 11:04:02,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 11:04:02,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:04:02,989 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:04:02,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:04:02,991 INFO L85 PathProgramCache]: Analyzing trace with hash 469605213, now seen corresponding path program 3 times [2022-12-14 11:04:02,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:04:02,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332968101] [2022-12-14 11:04:02,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:04:02,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:04:03,018 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:04:03,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612721074] [2022-12-14 11:04:03,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:04:03,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:04:03,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:04:03,019 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:04:03,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:04:03,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:04:03,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:04:03,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 11:04:03,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:04:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:04:03,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:04:03,143 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:04:03,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:04:03,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332968101] [2022-12-14 11:04:03,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:04:03,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612721074] [2022-12-14 11:04:03,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612721074] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:04:03,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1427685304] [2022-12-14 11:04:03,145 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 11:04:03,145 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:04:03,146 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:04:03,146 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:04:03,146 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:04:03,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:04:03,179 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 11:04:03,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 11:04:03,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:04:03,217 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:04:03,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:04:03,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:04:03,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:04:03,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 142 [2022-12-14 11:04:03,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:04:03,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:04:03,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 59 [2022-12-14 11:04:03,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-12-14 11:04:03,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:04:03,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-12-14 11:04:03,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 11:04:03,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 11:04:03,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 11:04:03,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 11:04:03,392 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:04:03,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 11:04:03,528 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:04:03,913 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '520#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~lim~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~lim~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= 4 |ULTIMATE.start_main_~R~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000 ~N~0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 1000) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:04:03,913 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:04:03,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:04:03,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-12-14 11:04:03,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824568244] [2022-12-14 11:04:03,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:04:03,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 11:04:03,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:04:03,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 11:04:03,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-12-14 11:04:03,914 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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 11:04:03,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:04:03,944 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-12-14 11:04:03,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 11:04:03,945 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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 21 [2022-12-14 11:04:03,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:04:03,945 INFO L225 Difference]: With dead ends: 44 [2022-12-14 11:04:03,945 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 11:04:03,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-12-14 11:04:03,946 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:04:03,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:04:03,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 11:04:03,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-12-14 11:04:03,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 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 11:04:03,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-12-14 11:04:03,954 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2022-12-14 11:04:03,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:04:03,955 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-12-14 11:04:03,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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 11:04:03,955 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-12-14 11:04:03,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 11:04:03,955 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:04:03,955 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 4, 4, 1, 1, 1, 1] [2022-12-14 11:04:03,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 11:04:04,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:04:04,158 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:04:04,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:04:04,159 INFO L85 PathProgramCache]: Analyzing trace with hash 453300637, now seen corresponding path program 4 times [2022-12-14 11:04:04,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:04:04,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308090429] [2022-12-14 11:04:04,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:04:04,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:04:04,197 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:04:04,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236039991] [2022-12-14 11:04:04,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:04:04,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:04:04,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:04:04,199 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:04:04,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:04:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:04:04,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 11:04:04,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:04:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:04:04,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:04:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:04:04,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:04:04,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308090429] [2022-12-14 11:04:04,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:04:04,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236039991] [2022-12-14 11:04:04,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236039991] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:04:04,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [134644035] [2022-12-14 11:04:04,540 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 11:04:04,540 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:04:04,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:04:04,540 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:04:04,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:04:04,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:04:04,573 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:04:04,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:04:04,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:04:04,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:04:04,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:04:04,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:04:04,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 168 [2022-12-14 11:04:04,631 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:04:04,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:04:04,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-12-14 11:04:04,726 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:04:04,740 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:04:04,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 11:04:04,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-12-14 11:04:04,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 11:04:04,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 179 [2022-12-14 11:04:04,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 11:04:04,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:04:04,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-12-14 11:04:04,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 11:04:04,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 11:04:04,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 11:04:04,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 11:04:04,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 11:04:04,957 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:04:05,030 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:04:05,342 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '814#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~lim~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~lim~0#1| 2147483648)) (= ~N~0 1000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:04:05,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:04:05,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:04:05,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-12-14 11:04:05,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266579502] [2022-12-14 11:04:05,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:04:05,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 11:04:05,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:04:05,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 11:04:05,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2022-12-14 11:04:05,345 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 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 11:04:05,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:04:05,407 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2022-12-14 11:04:05,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 11:04:05,408 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 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 27 [2022-12-14 11:04:05,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:04:05,409 INFO L225 Difference]: With dead ends: 56 [2022-12-14 11:04:05,409 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 11:04:05,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2022-12-14 11:04:05,410 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:04:05,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:04:05,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 11:04:05,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-12-14 11:04:05,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 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 11:04:05,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-12-14 11:04:05,424 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 27 [2022-12-14 11:04:05,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:04:05,425 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-12-14 11:04:05,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 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 11:04:05,425 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-12-14 11:04:05,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 11:04:05,426 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:04:05,426 INFO L195 NwaCegarLoop]: trace histogram [22, 5, 4, 4, 1, 1, 1, 1] [2022-12-14 11:04:05,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 11:04:05,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:04:05,628 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:04:05,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:04:05,629 INFO L85 PathProgramCache]: Analyzing trace with hash 864169501, now seen corresponding path program 5 times [2022-12-14 11:04:05,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:04:05,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425724691] [2022-12-14 11:04:05,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:04:05,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:04:05,675 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:04:05,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078273707] [2022-12-14 11:04:05,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:04:05,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:04:05,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:04:05,677 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:04:05,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:04:06,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 11:04:06,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:04:06,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 11:04:06,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:04:09,363 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:04:09,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 107 treesize of output 179 [2022-12-14 11:04:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 20 proven. 69 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-12-14 11:04:09,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:04:19,343 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse7 (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|))) (or (let ((.cse1 (mod (div (mod c_~N~0 4294967296) (* (mod |c_ULTIMATE.start_main_~R~0#1| 2147483648) 2)) 4294967296))) (let ((.cse0 (- .cse1))) (let ((.cse2 (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (not (= (select .cse7 (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)))) (.cse5 (< |c_ULTIMATE.start_main_~j~0#1| (+ (* (div (+ .cse0 |c_ULTIMATE.start_main_~j~0#1| (- 4294967295)) 4294967296) 4294967296) 8589934591))) (.cse6 (< |c_ULTIMATE.start_main_~j~0#1| (+ (* (div (+ (- 12884901886) |c_ULTIMATE.start_main_~j~0#1|) 4294967296) 4294967296) 12884901886 .cse1))) (.cse3 (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (= (select .cse7 (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0))) (.cse4 (< |c_ULTIMATE.start_main_~j~0#1| (+ (* (div (+ .cse0 |c_ULTIMATE.start_main_~j~0#1|) 4294967296) 4294967296) 4294967296)))) (and (or (< |c_ULTIMATE.start_main_~j~0#1| (+ 4294967295 (* 4294967296 (div (+ .cse0 |c_ULTIMATE.start_main_~j~0#1| 1) 4294967296)))) (< |c_ULTIMATE.start_main_~j~0#1| (+ 12884901885 (* (div (+ |c_ULTIMATE.start_main_~j~0#1| (- 12884901885)) 4294967296) 4294967296) .cse1)) .cse2 (< |c_ULTIMATE.start_main_~j~0#1| (+ 8589934590 (* (div (+ .cse0 |c_ULTIMATE.start_main_~j~0#1| (- 4294967294)) 4294967296) 4294967296)))) (or (and (or (< |c_ULTIMATE.start_main_~j~0#1| (+ (* (div (+ |c_ULTIMATE.start_main_~j~0#1| (- 12884901887)) 4294967296) 4294967296) 12884901887 .cse1)) .cse3 .cse4) (or .cse5 .cse6 .cse2)) .cse3) (or .cse5 .cse6 .cse3 .cse4))))) (forall ((|v_ULTIMATE.start_main_~i~0#1_136| Int)) (not (= (select .cse7 (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_136| 4))) 0))))) is different from false [2022-12-14 11:04:29,710 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:04:29,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 289 treesize of output 321 [2022-12-14 11:05:06,060 WARN L233 SmtUtils]: Spent 6.30s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:05:20,612 WARN L233 SmtUtils]: Spent 9.36s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:07:29,549 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 231 trivial. 11 not checked. [2022-12-14 11:07:29,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:07:29,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425724691] [2022-12-14 11:07:29,549 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:07:29,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078273707] [2022-12-14 11:07:29,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078273707] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:07:29,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [912083] [2022-12-14 11:07:29,551 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 11:07:29,551 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:07:29,551 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:07:29,552 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:07:29,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:07:29,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:07:29,588 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:07:29,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:07:29,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:07:29,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-12-14 11:07:29,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:07:29,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:07:29,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 168 [2022-12-14 11:07:29,651 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:07:29,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:07:29,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-12-14 11:07:29,721 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:07:29,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 11:07:29,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 11:07:29,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 11:07:29,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 10 [2022-12-14 11:07:29,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 11:07:29,980 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:07:30,598 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1226#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~lim~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~lim~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= 4 |ULTIMATE.start_main_~R~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000 ~N~0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 1000) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:07:30,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:07:30,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:07:30,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2022-12-14 11:07:30,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426568860] [2022-12-14 11:07:30,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:07:30,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 11:07:30,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:07:30,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 11:07:30,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=496, Unknown=2, NotChecked=48, Total=702 [2022-12-14 11:07:30,601 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 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 11:07:32,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 11:07:34,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 11:07:36,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 11:07:38,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 11:07:43,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 11:07:45,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 11:07:48,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 11:07:50,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 11:08:57,022 WARN L233 SmtUtils]: Spent 38.30s on a formula simplification. DAG size of input: 152 DAG size of output: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:08:59,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 11:09:01,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-14 11:10:19,417 WARN L233 SmtUtils]: Spent 1.28m on a formula simplification. DAG size of input: 170 DAG size of output: 108 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:11:50,846 WARN L233 SmtUtils]: Spent 1.47m on a formula simplification. DAG size of input: 167 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:12:09,741 WARN L233 SmtUtils]: Spent 16.73s on a formula simplification. DAG size of input: 147 DAG size of output: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:13:13,302 WARN L233 SmtUtils]: Spent 58.58s on a formula simplification. DAG size of input: 155 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:14:10,257 WARN L233 SmtUtils]: Spent 47.42s on a formula simplification. DAG size of input: 140 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:14:46,636 WARN L233 SmtUtils]: Spent 18.64s on a formula simplification. DAG size of input: 122 DAG size of output: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:14:48,712 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (mod (div (mod c_~N~0 4294967296) (* (mod |c_ULTIMATE.start_main_~R~0#1| 2147483648) 2)) 4294967296)) (.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|))) (and (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 1) (or (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0) (let ((.cse0 (- .cse1))) (and (or (< |c_ULTIMATE.start_main_~j~0#1| (+ 8589934589 (* (div (+ .cse0 |c_ULTIMATE.start_main_~j~0#1| (- 4294967293)) 4294967296) 4294967296))) (< |c_ULTIMATE.start_main_~j~0#1| (+ 12884901884 .cse1 (* (div (+ (- 12884901884) |c_ULTIMATE.start_main_~j~0#1|) 4294967296) 4294967296)))) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ (* (div (+ .cse0 |c_ULTIMATE.start_main_~j~0#1| 3) 4294967296) 4294967296) 4294967293)) (< |c_ULTIMATE.start_main_~j~0#1| (+ (* 4294967296 (div (+ |c_ULTIMATE.start_main_~j~0#1| (- 12884901883)) 4294967296)) 12884901883 .cse1))) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ (* (div (+ .cse0 |c_ULTIMATE.start_main_~j~0#1| (- 4294967295)) 4294967296) 4294967296) 8589934591)) (< |c_ULTIMATE.start_main_~j~0#1| (+ (* (div (+ (- 12884901886) |c_ULTIMATE.start_main_~j~0#1|) 4294967296) 4294967296) 12884901886 .cse1))) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ (* (div (+ |c_ULTIMATE.start_main_~j~0#1| (- 12884901887)) 4294967296) 4294967296) 12884901887 .cse1)) (< |c_ULTIMATE.start_main_~j~0#1| (+ (* (div (+ .cse0 |c_ULTIMATE.start_main_~j~0#1|) 4294967296) 4294967296) 4294967296))) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ 12884901885 (* (div (+ |c_ULTIMATE.start_main_~j~0#1| (- 12884901885)) 4294967296) 4294967296) .cse1)) (< |c_ULTIMATE.start_main_~j~0#1| (+ 8589934590 (* (div (+ .cse0 |c_ULTIMATE.start_main_~j~0#1| (- 4294967294)) 4294967296) 4294967296))))))) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ (* (div (+ |c_ULTIMATE.start_main_~j~0#1| (- 4294967295)) 4294967296) 4294967296) 4294967295 .cse1)) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (not (= (select .cse2 (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)))) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ (* 4294967296 (div |c_ULTIMATE.start_main_~j~0#1| 4294967296)) .cse1)) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (= (select .cse2 (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0))))) is different from false [2022-12-14 11:14:50,803 WARN L837 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 1) (or (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0) (let ((.cse1 (mod (div (mod c_~N~0 4294967296) (* (mod |c_ULTIMATE.start_main_~R~0#1| 2147483648) 2)) 4294967296))) (let ((.cse0 (- .cse1))) (and (or (< |c_ULTIMATE.start_main_~j~0#1| (+ 8589934589 (* (div (+ .cse0 |c_ULTIMATE.start_main_~j~0#1| (- 4294967293)) 4294967296) 4294967296))) (< |c_ULTIMATE.start_main_~j~0#1| (+ 12884901884 .cse1 (* (div (+ (- 12884901884) |c_ULTIMATE.start_main_~j~0#1|) 4294967296) 4294967296)))) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ (* (div (+ .cse0 |c_ULTIMATE.start_main_~j~0#1| 3) 4294967296) 4294967296) 4294967293)) (< |c_ULTIMATE.start_main_~j~0#1| (+ (* 4294967296 (div (+ |c_ULTIMATE.start_main_~j~0#1| (- 12884901883)) 4294967296)) 12884901883 .cse1))) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ (* (div (+ .cse0 |c_ULTIMATE.start_main_~j~0#1| (- 4294967295)) 4294967296) 4294967296) 8589934591)) (< |c_ULTIMATE.start_main_~j~0#1| (+ (* (div (+ (- 12884901886) |c_ULTIMATE.start_main_~j~0#1|) 4294967296) 4294967296) 12884901886 .cse1))) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ (* (div (+ |c_ULTIMATE.start_main_~j~0#1| (- 12884901887)) 4294967296) 4294967296) 12884901887 .cse1)) (< |c_ULTIMATE.start_main_~j~0#1| (+ (* (div (+ .cse0 |c_ULTIMATE.start_main_~j~0#1|) 4294967296) 4294967296) 4294967296))) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ 12884901885 (* (div (+ |c_ULTIMATE.start_main_~j~0#1| (- 12884901885)) 4294967296) 4294967296) .cse1)) (< |c_ULTIMATE.start_main_~j~0#1| (+ 8589934590 (* (div (+ .cse0 |c_ULTIMATE.start_main_~j~0#1| (- 4294967294)) 4294967296) 4294967296))))))))) is different from false [2022-12-14 11:15:26,210 WARN L233 SmtUtils]: Spent 18.30s on a formula simplification. DAG size of input: 142 DAG size of output: 127 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:15:30,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:30,977 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2022-12-14 11:15:30,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 11:15:30,977 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 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 39 [2022-12-14 11:15:30,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:30,978 INFO L225 Difference]: With dead ends: 62 [2022-12-14 11:15:30,978 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 11:15:30,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 490.2s TimeCoverageRelationStatistics Valid=393, Invalid=1166, Unknown=13, NotChecked=234, Total=1806 [2022-12-14 11:15:30,979 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 33 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 25 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 27.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:30,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 139 Invalid, 16 Unknown, 17 Unchecked, 27.8s Time] [2022-12-14 11:15:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 11:15:30,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-12-14 11:15:30,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 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 11:15:30,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-12-14 11:15:30,989 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 39 [2022-12-14 11:15:30,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:30,989 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-12-14 11:15:30,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 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 11:15:30,989 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-12-14 11:15:30,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 11:15:30,991 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:30,991 INFO L195 NwaCegarLoop]: trace histogram [22, 11, 10, 10, 1, 1, 1, 1] [2022-12-14 11:15:30,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 11:15:31,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 11:15:31,193 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:31,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:31,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1993329475, now seen corresponding path program 6 times [2022-12-14 11:15:31,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:31,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286165896] [2022-12-14 11:15:31,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:31,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:31,266 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:15:31,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759184392] [2022-12-14 11:15:31,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:15:31,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:31,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:15:31,268 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:15:31,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 11:15:31,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:15:31,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:15:31,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 11:15:31,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:15:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-12-14 11:15:31,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:15:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-12-14 11:15:32,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:32,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286165896] [2022-12-14 11:15:32,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:15:32,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759184392] [2022-12-14 11:15:32,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759184392] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:15:32,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1786537830] [2022-12-14 11:15:32,082 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 11:15:32,082 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:15:32,082 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:15:32,082 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:15:32,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:15:32,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:15:32,106 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 11:15:32,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 11:15:32,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:15:32,133 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:15:32,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:15:32,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:15:32,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:15:32,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 142 [2022-12-14 11:15:32,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:15:32,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:15:32,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 54 [2022-12-14 11:15:32,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-12-14 11:15:32,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:15:32,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-12-14 11:15:32,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-12-14 11:15:32,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 11:15:32,273 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:15:32,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 11:15:32,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 11:15:32,506 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:15:44,597 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1837#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~lim~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~lim~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= 4 |ULTIMATE.start_main_~R~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 1000 ~N~0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= (ite (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod ~N~0 4294967296) (* 2 (mod |ULTIMATE.start_main_~R~0#1| 2147483648))) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= ~N~0 1000) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:15:44,597 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:15:44,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:15:44,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2022-12-14 11:15:44,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658716538] [2022-12-14 11:15:44,598 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:15:44,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 11:15:44,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:44,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 11:15:44,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1147, Invalid=1609, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 11:15:44,599 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 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 11:15:44,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:44,800 INFO L93 Difference]: Finished difference Result 116 states and 141 transitions. [2022-12-14 11:15:44,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 11:15:44,800 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 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 57 [2022-12-14 11:15:44,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:44,801 INFO L225 Difference]: With dead ends: 116 [2022-12-14 11:15:44,801 INFO L226 Difference]: Without dead ends: 82 [2022-12-14 11:15:44,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=1147, Invalid=1609, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 11:15:44,802 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:44,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 24 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:15:44,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-12-14 11:15:44,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-12-14 11:15:44,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 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 11:15:44,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-12-14 11:15:44,815 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 57 [2022-12-14 11:15:44,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:44,815 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-12-14 11:15:44,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 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 11:15:44,815 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-12-14 11:15:44,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 11:15:44,816 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:44,816 INFO L195 NwaCegarLoop]: trace histogram [46, 11, 10, 10, 1, 1, 1, 1] [2022-12-14 11:15:44,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 11:15:45,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 11:15:45,018 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:45,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:45,019 INFO L85 PathProgramCache]: Analyzing trace with hash -703959619, now seen corresponding path program 7 times [2022-12-14 11:15:45,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:45,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191543465] [2022-12-14 11:15:45,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:45,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:45,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:15:45,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667996291] [2022-12-14 11:15:45,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:15:45,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:45,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:15:45,123 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:15:45,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 11:15:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:15:45,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 11:15:45,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:15:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-12-14 11:15:46,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:15:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-12-14 11:15:48,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:15:48,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191543465] [2022-12-14 11:15:48,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 11:15:48,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667996291] [2022-12-14 11:15:48,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667996291] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:15:48,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1255555665] [2022-12-14 11:15:48,644 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 11:15:48,645 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:15:48,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:15:48,645 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:15:48,645 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:15:48,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:15:48,680 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-12-14 11:15:48,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-12-14 11:15:48,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:15:48,712 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 11:15:48,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-12-14 11:15:48,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:15:48,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:15:48,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 142 [2022-12-14 11:15:48,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:15:48,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 64 [2022-12-14 11:15:48,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2022-12-14 11:15:48,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:15:48,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 134 [2022-12-14 11:15:48,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-12-14 11:15:48,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2022-12-14 11:15:48,861 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 11:15:48,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 11:15:48,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2022-12-14 11:15:49,114 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:15:51,327 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2743#(and (<= 0 |ULTIMATE.start_main_~k~0#1|) (<= |ULTIMATE.start_main_~lim~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 (+ |ULTIMATE.start_main_~lim~0#1| 2147483648)) (<= 1 |ULTIMATE.start_main_~j~0#1|) (= ~N~0 1000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~R~0#1| 4) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (ite (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod ~N~0 4294967296) (* 2 (mod |ULTIMATE.start_main_~R~0#1| 2147483648))) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:15:51,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:15:51,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:15:51,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 95 [2022-12-14 11:15:51,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575664513] [2022-12-14 11:15:51,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:15:51,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-12-14 11:15:51,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:15:51,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-12-14 11:15:51,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4579, Invalid=5521, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 11:15:51,333 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 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 11:15:51,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:15:51,837 INFO L93 Difference]: Finished difference Result 164 states and 213 transitions. [2022-12-14 11:15:51,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-14 11:15:51,838 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 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 81 [2022-12-14 11:15:51,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:15:51,838 INFO L225 Difference]: With dead ends: 164 [2022-12-14 11:15:51,839 INFO L226 Difference]: Without dead ends: 130 [2022-12-14 11:15:51,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4579, Invalid=5521, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 11:15:51,840 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:15:51,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 24 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:15:51,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-12-14 11:15:51,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-12-14 11:15:51,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 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 11:15:51,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2022-12-14 11:15:51,861 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 81 [2022-12-14 11:15:51,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:15:51,861 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2022-12-14 11:15:51,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 95 states have internal predecessors, (101), 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 11:15:51,861 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2022-12-14 11:15:51,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-12-14 11:15:51,862 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:15:51,862 INFO L195 NwaCegarLoop]: trace histogram [94, 11, 10, 10, 1, 1, 1, 1] [2022-12-14 11:15:51,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 11:15:52,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:52,064 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 11:15:52,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:15:52,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1976705091, now seen corresponding path program 8 times [2022-12-14 11:15:52,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:15:52,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394141868] [2022-12-14 11:15:52,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:15:52,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:15:52,169 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 11:15:52,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479416636] [2022-12-14 11:15:52,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:15:52,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:15:52,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:15:52,170 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:15:52,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6893b056-fb06-4a19-b82d-915d1697c6ee/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 11:16:38,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-14 11:16:38,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:16:38,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-14 11:16:38,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:16:41,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:16:41,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 138 treesize of output 262 [2022-12-14 11:16:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 0 proven. 965 refuted. 0 times theorem prover too weak. 3655 trivial. 0 not checked. [2022-12-14 11:16:41,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:17:50,547 WARN L233 SmtUtils]: Spent 26.39s on a formula simplification. DAG size of input: 124 DAG size of output: 117 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)