./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur --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 e6ceef81d5d5c6ec4b435ae3bf6300a70928e11f3a8c1d376463323495e50f12 --- 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-38b53e6 [2022-11-25 22:36:15,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:36:15,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:36:15,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:36:15,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:36:15,624 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:36:15,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:36:15,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:36:15,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:36:15,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:36:15,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:36:15,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:36:15,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:36:15,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:36:15,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:36:15,637 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:36:15,638 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:36:15,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:36:15,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:36:15,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:36:15,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:36:15,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:36:15,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:36:15,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:36:15,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:36:15,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:36:15,653 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:36:15,654 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:36:15,654 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:36:15,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:36:15,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:36:15,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:36:15,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:36:15,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:36:15,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:36:15,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:36:15,661 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:36:15,662 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:36:15,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:36:15,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:36:15,664 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:36:15,666 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 22:36:15,691 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:36:15,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:36:15,692 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:36:15,692 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:36:15,692 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:36:15,693 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:36:15,693 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:36:15,693 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:36:15,694 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:36:15,694 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:36:15,694 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:36:15,694 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:36:15,694 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:36:15,695 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:36:15,695 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:36:15,695 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:36:15,695 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:36:15,696 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:36:15,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:36:15,697 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:36:15,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:36:15,697 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:36:15,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:36:15,698 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 22:36:15,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:36:15,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 22:36:15,698 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:36:15,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 22:36:15,699 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:36:15,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 22:36:15,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:36:15,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:36:15,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:36:15,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:36:15,700 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:36:15,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:36:15,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 22:36:15,701 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:36:15,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:36:15,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 22:36:15,702 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:36:15,702 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_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6ceef81d5d5c6ec4b435ae3bf6300a70928e11f3a8c1d376463323495e50f12 [2022-11-25 22:36:15,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:36:16,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:36:16,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:36:16,021 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:36:16,022 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:36:16,023 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c [2022-11-25 22:36:19,180 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:36:19,347 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:36:19,347 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c [2022-11-25 22:36:19,352 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/data/cbeb233ed/ba9e8f0cf11c4ea0b1fd242459cf0028/FLAG159a4f3c6 [2022-11-25 22:36:19,369 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/data/cbeb233ed/ba9e8f0cf11c4ea0b1fd242459cf0028 [2022-11-25 22:36:19,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:36:19,374 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:36:19,376 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:36:19,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:36:19,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:36:19,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:36:19" (1/1) ... [2022-11-25 22:36:19,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fcd0e50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:19, skipping insertion in model container [2022-11-25 22:36:19,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:36:19" (1/1) ... [2022-11-25 22:36:19,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:36:19,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:36:19,564 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_d4f4ab45-f25d-4373-b5cb-12615ef01f43/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c[557,570] [2022-11-25 22:36:19,569 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_d4f4ab45-f25d-4373-b5cb-12615ef01f43/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c[613,626] [2022-11-25 22:36:19,571 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:36:19,582 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:36:19,595 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_d4f4ab45-f25d-4373-b5cb-12615ef01f43/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c[557,570] [2022-11-25 22:36:19,596 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_d4f4ab45-f25d-4373-b5cb-12615ef01f43/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c[613,626] [2022-11-25 22:36:19,596 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:36:19,631 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:36:19,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:19 WrapperNode [2022-11-25 22:36:19,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:36:19,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:36:19,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:36:19,634 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:36:19,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:19" (1/1) ... [2022-11-25 22:36:19,647 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:19" (1/1) ... [2022-11-25 22:36:19,662 INFO L138 Inliner]: procedures = 11, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2022-11-25 22:36:19,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:36:19,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:36:19,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:36:19,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:36:19,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:19" (1/1) ... [2022-11-25 22:36:19,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:19" (1/1) ... [2022-11-25 22:36:19,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:19" (1/1) ... [2022-11-25 22:36:19,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:19" (1/1) ... [2022-11-25 22:36:19,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:19" (1/1) ... [2022-11-25 22:36:19,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:19" (1/1) ... [2022-11-25 22:36:19,682 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:19" (1/1) ... [2022-11-25 22:36:19,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:19" (1/1) ... [2022-11-25 22:36:19,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:36:19,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:36:19,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:36:19,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:36:19,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:19" (1/1) ... [2022-11-25 22:36:19,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:36:19,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:36:19,718 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:36:19,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:36:19,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:36:19,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:36:19,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:36:19,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 22:36:19,833 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:36:19,835 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:36:20,053 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:36:20,077 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:36:20,081 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 22:36:20,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:36:20 BoogieIcfgContainer [2022-11-25 22:36:20,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:36:20,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:36:20,090 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:36:20,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:36:20,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:36:19" (1/3) ... [2022-11-25 22:36:20,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b65d15d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:36:20, skipping insertion in model container [2022-11-25 22:36:20,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:36:19" (2/3) ... [2022-11-25 22:36:20,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b65d15d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:36:20, skipping insertion in model container [2022-11-25 22:36:20,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:36:20" (3/3) ... [2022-11-25 22:36:20,101 INFO L112 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-a.c [2022-11-25 22:36:20,127 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:36:20,128 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 22:36:20,205 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:36:20,214 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;@7aa70402, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:36:20,215 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 22:36:20,220 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 8 states have (on average 1.75) internal successors, (14), 10 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) [2022-11-25 22:36:20,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 22:36:20,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:20,229 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 22:36:20,229 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:20,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:20,239 INFO L85 PathProgramCache]: Analyzing trace with hash 63046149, now seen corresponding path program 1 times [2022-11-25 22:36:20,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:20,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882610719] [2022-11-25 22:36:20,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:20,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:20,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:20,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:20,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882610719] [2022-11-25 22:36:20,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882610719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:36:20,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:36:20,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:36:20,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028232544] [2022-11-25 22:36:20,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:36:20,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:36:20,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:20,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:36:20,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:36:20,777 INFO L87 Difference]: Start difference. First operand has 11 states, 8 states have (on average 1.75) internal successors, (14), 10 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) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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) [2022-11-25 22:36:20,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:20,810 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2022-11-25 22:36:20,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:36:20,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 [2022-11-25 22:36:20,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:20,822 INFO L225 Difference]: With dead ends: 20 [2022-11-25 22:36:20,823 INFO L226 Difference]: Without dead ends: 10 [2022-11-25 22:36:20,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:36:20,830 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:20,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 22:36:20,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-25 22:36:20,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-25 22:36:20,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 8 states have (on average 1.25) internal successors, (10), 9 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) [2022-11-25 22:36:20,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2022-11-25 22:36:20,867 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 5 [2022-11-25 22:36:20,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:20,868 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2022-11-25 22:36:20,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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) [2022-11-25 22:36:20,869 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2022-11-25 22:36:20,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 22:36:20,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:20,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 22:36:20,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 22:36:20,870 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:20,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:20,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1953761755, now seen corresponding path program 1 times [2022-11-25 22:36:20,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:20,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426122412] [2022-11-25 22:36:20,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:20,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:21,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:21,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426122412] [2022-11-25 22:36:21,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426122412] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:36:21,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436317337] [2022-11-25 22:36:21,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:21,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:21,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:36:21,153 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:36:21,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 22:36:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:21,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 22:36:21,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:36:21,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:21,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:36:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:21,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436317337] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:36:21,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1017180608] [2022-11-25 22:36:21,506 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-25 22:36:21,506 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:36:21,510 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:36:21,516 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:36:21,517 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:36:21,887 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:36:22,047 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '90#(and (not (< (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (mod (mod |ULTIMATE.start_main_~n~0#1| 256) 4294967296))) (<= 0 |ULTIMATE.start_main_~i~0#1|) (< (mod |ULTIMATE.start_main_~s~0#1| 4294967296) (mod (mod |ULTIMATE.start_main_~v~0#1| 256) 4294967296)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:36:22,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:36:22,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:36:22,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-25 22:36:22,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278838876] [2022-11-25 22:36:22,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:36:22,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 22:36:22,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:22,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 22:36:22,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-25 22:36:22,051 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2022-11-25 22:36:22,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:22,201 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-11-25 22:36:22,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:36:22,202 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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 [2022-11-25 22:36:22,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:22,202 INFO L225 Difference]: With dead ends: 27 [2022-11-25 22:36:22,202 INFO L226 Difference]: Without dead ends: 21 [2022-11-25 22:36:22,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:36:22,205 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:22,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 10 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:36:22,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-25 22:36:22,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2022-11-25 22:36:22,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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) [2022-11-25 22:36:22,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-25 22:36:22,212 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2022-11-25 22:36:22,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:22,212 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-25 22:36:22,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 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) [2022-11-25 22:36:22,213 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-25 22:36:22,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 22:36:22,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:22,219 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-25 22:36:22,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 22:36:22,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-25 22:36:22,425 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:22,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:22,425 INFO L85 PathProgramCache]: Analyzing trace with hash 643607479, now seen corresponding path program 1 times [2022-11-25 22:36:22,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:22,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018782018] [2022-11-25 22:36:22,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:22,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:22,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:22,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018782018] [2022-11-25 22:36:22,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018782018] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:36:22,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863904066] [2022-11-25 22:36:22,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:22,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:22,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:36:22,591 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:36:22,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 22:36:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:22,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 22:36:22,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:36:22,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:22,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:36:22,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:22,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863904066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:36:22,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1240154802] [2022-11-25 22:36:22,920 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:36:22,921 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:36:22,922 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:36:22,922 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:36:22,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:36:23,075 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:36:23,260 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '199#(and (not (< (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (mod (mod |ULTIMATE.start_main_~n~0#1| 256) 4294967296))) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.offset| 0) (< 65025 (mod |ULTIMATE.start_main_~s~0#1| 4294967296)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:36:23,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:36:23,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:36:23,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-25 22:36:23,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363813108] [2022-11-25 22:36:23,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:36:23,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 22:36:23,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:23,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 22:36:23,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:36:23,263 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2022-11-25 22:36:23,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:23,376 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-11-25 22:36:23,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:36:23,377 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) Word has length 8 [2022-11-25 22:36:23,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:23,378 INFO L225 Difference]: With dead ends: 25 [2022-11-25 22:36:23,378 INFO L226 Difference]: Without dead ends: 17 [2022-11-25 22:36:23,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-25 22:36:23,380 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:23,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:36:23,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-25 22:36:23,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-11-25 22:36:23,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 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) [2022-11-25 22:36:23,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-11-25 22:36:23,392 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-11-25 22:36:23,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:23,394 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-11-25 22:36:23,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2022-11-25 22:36:23,395 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-11-25 22:36:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 22:36:23,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:23,397 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2022-11-25 22:36:23,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 22:36:23,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:23,603 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:23,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:23,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1544534139, now seen corresponding path program 2 times [2022-11-25 22:36:23,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:23,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368983237] [2022-11-25 22:36:23,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:23,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:23,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:23,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368983237] [2022-11-25 22:36:23,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368983237] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:36:23,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407794258] [2022-11-25 22:36:23,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:36:23,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:23,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:36:23,928 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:36:23,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 22:36:24,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 22:36:24,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:36:24,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 22:36:24,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:36:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:24,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:36:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:24,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407794258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:36:24,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1604322166] [2022-11-25 22:36:24,419 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-25 22:36:24,419 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:36:24,420 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:36:24,420 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:36:24,420 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:36:24,533 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:36:24,678 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '320#(and (not (< (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (mod (mod |ULTIMATE.start_main_~n~0#1| 256) 4294967296))) (<= 0 |ULTIMATE.start_main_~i~0#1|) (< (mod |ULTIMATE.start_main_~s~0#1| 4294967296) (mod (mod |ULTIMATE.start_main_~v~0#1| 256) 4294967296)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:36:24,678 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:36:24,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:36:24,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-25 22:36:24,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033885054] [2022-11-25 22:36:24,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:36:24,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 22:36:24,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:24,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 22:36:24,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-25 22:36:24,681 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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) [2022-11-25 22:36:25,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:25,072 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-11-25 22:36:25,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 22:36:25,073 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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 [2022-11-25 22:36:25,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:25,074 INFO L225 Difference]: With dead ends: 39 [2022-11-25 22:36:25,074 INFO L226 Difference]: Without dead ends: 35 [2022-11-25 22:36:25,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2022-11-25 22:36:25,076 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 34 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:25,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:36:25,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-25 22:36:25,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2022-11-25 22:36:25,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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) [2022-11-25 22:36:25,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-11-25 22:36:25,085 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 9 [2022-11-25 22:36:25,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:25,085 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-11-25 22:36:25,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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) [2022-11-25 22:36:25,086 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-11-25 22:36:25,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 22:36:25,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:25,086 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2022-11-25 22:36:25,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 22:36:25,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:25,291 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:25,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:25,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1895401929, now seen corresponding path program 2 times [2022-11-25 22:36:25,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:25,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491726065] [2022-11-25 22:36:25,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:25,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:25,634 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:25,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:25,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491726065] [2022-11-25 22:36:25,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491726065] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:36:25,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328310478] [2022-11-25 22:36:25,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:36:25,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:25,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:36:25,637 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:36:25,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 22:36:25,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 22:36:25,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:36:25,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 22:36:25,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:36:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:25,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:36:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:26,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328310478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:36:26,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1260783518] [2022-11-25 22:36:26,054 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:36:26,054 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:36:26,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:36:26,055 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:36:26,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:36:26,135 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:36:26,300 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '503#(and (not (< (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (mod (mod |ULTIMATE.start_main_~n~0#1| 256) 4294967296))) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.offset| 0) (< 65025 (mod |ULTIMATE.start_main_~s~0#1| 4294967296)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:36:26,301 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:36:26,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:36:26,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-25 22:36:26,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572230568] [2022-11-25 22:36:26,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:36:26,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 22:36:26,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:26,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 22:36:26,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2022-11-25 22:36:26,303 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:26,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:26,474 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2022-11-25 22:36:26,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 22:36:26,475 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 22:36:26,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:26,476 INFO L225 Difference]: With dead ends: 41 [2022-11-25 22:36:26,477 INFO L226 Difference]: Without dead ends: 27 [2022-11-25 22:36:26,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2022-11-25 22:36:26,478 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 32 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:26,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 11 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:36:26,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-25 22:36:26,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-11-25 22:36:26,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 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) [2022-11-25 22:36:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-25 22:36:26,488 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2022-11-25 22:36:26,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:26,489 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-25 22:36:26,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:26,489 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-25 22:36:26,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 22:36:26,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:26,490 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2022-11-25 22:36:26,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:36:26,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:26,699 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:26,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:26,700 INFO L85 PathProgramCache]: Analyzing trace with hash 779749317, now seen corresponding path program 3 times [2022-11-25 22:36:26,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:26,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104570248] [2022-11-25 22:36:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:26,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:27,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:27,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104570248] [2022-11-25 22:36:27,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104570248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:36:27,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019220993] [2022-11-25 22:36:27,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:36:27,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:27,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:36:27,171 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:36:27,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 22:36:27,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:36:27,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:36:27,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 22:36:27,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:36:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:27,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:36:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:28,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019220993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:36:28,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [946389338] [2022-11-25 22:36:28,094 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-25 22:36:28,094 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:36:28,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:36:28,095 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:36:28,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:36:28,174 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:36:28,348 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '712#(and (not (< (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (mod (mod |ULTIMATE.start_main_~n~0#1| 256) 4294967296))) (<= 0 |ULTIMATE.start_main_~i~0#1|) (< (mod |ULTIMATE.start_main_~s~0#1| 4294967296) (mod (mod |ULTIMATE.start_main_~v~0#1| 256) 4294967296)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:36:28,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:36:28,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:36:28,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-11-25 22:36:28,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474366775] [2022-11-25 22:36:28,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:36:28,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 22:36:28,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:28,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 22:36:28,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=541, Unknown=0, NotChecked=0, Total=812 [2022-11-25 22:36:28,351 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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) [2022-11-25 22:36:29,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:29,336 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2022-11-25 22:36:29,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 22:36:29,337 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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 15 [2022-11-25 22:36:29,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:29,338 INFO L225 Difference]: With dead ends: 69 [2022-11-25 22:36:29,338 INFO L226 Difference]: Without dead ends: 63 [2022-11-25 22:36:29,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=771, Invalid=1581, Unknown=0, NotChecked=0, Total=2352 [2022-11-25 22:36:29,340 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 97 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:29,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 20 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:36:29,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-25 22:36:29,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 32. [2022-11-25 22:36:29,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:36:29,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-11-25 22:36:29,356 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 15 [2022-11-25 22:36:29,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:29,357 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-11-25 22:36:29,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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) [2022-11-25 22:36:29,357 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-11-25 22:36:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-25 22:36:29,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:29,358 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2022-11-25 22:36:29,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:36:29,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 22:36:29,564 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:29,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:29,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1916685111, now seen corresponding path program 3 times [2022-11-25 22:36:29,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:29,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971729270] [2022-11-25 22:36:29,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:29,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:30,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:30,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971729270] [2022-11-25 22:36:30,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971729270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:36:30,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865997480] [2022-11-25 22:36:30,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 22:36:30,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:30,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:36:30,407 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:36:30,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:36:31,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 22:36:31,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:36:31,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 22:36:31,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:36:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:31,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:36:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:32,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865997480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:36:32,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1736970225] [2022-11-25 22:36:32,213 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:36:32,213 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:36:32,214 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:36:32,214 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:36:32,214 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:36:32,290 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:36:32,493 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1049#(and (not (< (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (mod (mod |ULTIMATE.start_main_~n~0#1| 256) 4294967296))) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.offset| 0) (< 65025 (mod |ULTIMATE.start_main_~s~0#1| 4294967296)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:36:32,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:36:32,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:36:32,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2022-11-25 22:36:32,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996324572] [2022-11-25 22:36:32,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:36:32,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 22:36:32,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:32,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 22:36:32,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=820, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 22:36:32,496 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 32 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 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) [2022-11-25 22:36:34,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 22:36:34,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:34,508 INFO L93 Difference]: Finished difference Result 73 states and 96 transitions. [2022-11-25 22:36:34,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 22:36:34,509 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 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 20 [2022-11-25 22:36:34,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:34,510 INFO L225 Difference]: With dead ends: 73 [2022-11-25 22:36:34,510 INFO L226 Difference]: Without dead ends: 47 [2022-11-25 22:36:34,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=512, Invalid=820, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 22:36:34,512 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 61 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:34,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 11 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-25 22:36:34,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-25 22:36:34,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2022-11-25 22:36:34,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.263157894736842) internal successors, (48), 39 states have internal predecessors, (48), 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) [2022-11-25 22:36:34,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-11-25 22:36:34,530 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 20 [2022-11-25 22:36:34,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:34,531 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-11-25 22:36:34,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 32 states have internal predecessors, (38), 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) [2022-11-25 22:36:34,531 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-11-25 22:36:34,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-25 22:36:34,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:34,532 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2022-11-25 22:36:34,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:36:34,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:34,738 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:34,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:34,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1091700667, now seen corresponding path program 4 times [2022-11-25 22:36:34,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:34,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502462057] [2022-11-25 22:36:34,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:34,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:36,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:36,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502462057] [2022-11-25 22:36:36,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502462057] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:36:36,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307557842] [2022-11-25 22:36:36,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:36:36,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:36,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:36:36,039 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:36:36,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 22:36:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:36,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-25 22:36:36,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:36:36,577 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:36,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:36:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:38,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307557842] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:36:38,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [804309649] [2022-11-25 22:36:38,428 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-25 22:36:38,428 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:36:38,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:36:38,428 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:36:38,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:36:38,529 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:36:38,805 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1434#(and (not (< (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (mod (mod |ULTIMATE.start_main_~n~0#1| 256) 4294967296))) (<= 0 |ULTIMATE.start_main_~i~0#1|) (< (mod |ULTIMATE.start_main_~s~0#1| 4294967296) (mod (mod |ULTIMATE.start_main_~v~0#1| 256) 4294967296)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:36:38,805 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:36:38,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:36:38,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-11-25 22:36:38,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139919967] [2022-11-25 22:36:38,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:36:38,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-25 22:36:38,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:38,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-25 22:36:38,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1099, Invalid=1657, Unknown=0, NotChecked=0, Total=2756 [2022-11-25 22:36:38,809 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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) [2022-11-25 22:36:41,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:41,842 INFO L93 Difference]: Finished difference Result 129 states and 152 transitions. [2022-11-25 22:36:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-25 22:36:41,844 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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 [2022-11-25 22:36:41,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:41,845 INFO L225 Difference]: With dead ends: 129 [2022-11-25 22:36:41,845 INFO L226 Difference]: Without dead ends: 119 [2022-11-25 22:36:41,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3255, Invalid=6057, Unknown=0, NotChecked=0, Total=9312 [2022-11-25 22:36:41,850 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 255 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:41,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 30 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:36:41,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-25 22:36:41,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 56. [2022-11-25 22:36:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 55 states have internal predecessors, (72), 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) [2022-11-25 22:36:41,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2022-11-25 22:36:41,885 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 27 [2022-11-25 22:36:41,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:41,886 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2022-11-25 22:36:41,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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) [2022-11-25 22:36:41,886 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2022-11-25 22:36:41,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-25 22:36:41,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:41,888 INFO L195 NwaCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1] [2022-11-25 22:36:41,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-25 22:36:42,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 22:36:42,094 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:42,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:42,095 INFO L85 PathProgramCache]: Analyzing trace with hash 163509559, now seen corresponding path program 4 times [2022-11-25 22:36:42,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:42,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139947884] [2022-11-25 22:36:42,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:42,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:44,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:44,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139947884] [2022-11-25 22:36:44,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139947884] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:36:44,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320390746] [2022-11-25 22:36:44,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 22:36:44,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:44,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:36:44,223 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:36:44,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 22:36:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:44,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-25 22:36:44,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:36:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:44,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:36:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:48,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320390746] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:36:48,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1743657698] [2022-11-25 22:36:48,093 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-25 22:36:48,093 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 22:36:48,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 22:36:48,094 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 22:36:48,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 22:36:48,167 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 22:36:48,447 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2079#(and (not (< (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (mod (mod |ULTIMATE.start_main_~n~0#1| 256) 4294967296))) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.offset| 0) (< 65025 (mod |ULTIMATE.start_main_~s~0#1| 4294967296)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 22:36:48,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 22:36:48,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 22:36:48,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 64 [2022-11-25 22:36:48,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020193208] [2022-11-25 22:36:48,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 22:36:48,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-25 22:36:48,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 22:36:48,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-25 22:36:48,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2032, Invalid=2660, Unknown=0, NotChecked=0, Total=4692 [2022-11-25 22:36:48,452 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 64 states, 64 states have (on average 1.09375) internal successors, (70), 64 states have internal predecessors, (70), 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) [2022-11-25 22:36:49,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:36:49,077 INFO L93 Difference]: Finished difference Result 137 states and 184 transitions. [2022-11-25 22:36:49,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-25 22:36:49,078 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.09375) internal successors, (70), 64 states have internal predecessors, (70), 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 36 [2022-11-25 22:36:49,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:36:49,079 INFO L225 Difference]: With dead ends: 137 [2022-11-25 22:36:49,079 INFO L226 Difference]: Without dead ends: 87 [2022-11-25 22:36:49,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2032, Invalid=2660, Unknown=0, NotChecked=0, Total=4692 [2022-11-25 22:36:49,084 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 152 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 22:36:49,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 14 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 22:36:49,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-25 22:36:49,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2022-11-25 22:36:49,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 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) [2022-11-25 22:36:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2022-11-25 22:36:49,112 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 36 [2022-11-25 22:36:49,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:36:49,112 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2022-11-25 22:36:49,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.09375) internal successors, (70), 64 states have internal predecessors, (70), 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) [2022-11-25 22:36:49,113 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2022-11-25 22:36:49,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-25 22:36:49,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:36:49,114 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2022-11-25 22:36:49,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 22:36:49,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:49,320 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 22:36:49,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:36:49,320 INFO L85 PathProgramCache]: Analyzing trace with hash -632841915, now seen corresponding path program 5 times [2022-11-25 22:36:49,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 22:36:49,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854553768] [2022-11-25 22:36:49,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:36:49,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 22:36:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:36:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:36:53,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 22:36:53,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854553768] [2022-11-25 22:36:53,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854553768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 22:36:53,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380329609] [2022-11-25 22:36:53,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 22:36:53,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:36:53,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:36:53,612 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:36:53,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d4f4ab45-f25d-4373-b5cb-12615ef01f43/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 22:37:20,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-25 22:37:20,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:37:20,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-25 22:37:20,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:37:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:37:21,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:51:24,158 WARN L837 $PredicateComparison]: unable to prove that (forall ((|aux_mod_v_ULTIMATE.start_main_~v~0#1_146_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_140_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_144_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_138_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_142_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_137_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_135_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_133_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_123_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_131_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_125_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_127_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_129_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_145_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_122_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_143_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_139_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_141_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_136_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_134_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_124_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_130_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_132_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_126_44| Int) (|aux_mod_v_ULTIMATE.start_main_~v~0#1_128_44| Int)) (or (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_139_44|) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_127_44| 256) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_142_44| 256) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_137_44|) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_131_44| 256) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_143_44| 256) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_144_44|) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_124_44|) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_138_44| 256) (let ((.cse0 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_141_44|)) (.cse1 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_124_44|)) (.cse2 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_125_44|)) (.cse3 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_122_44|)) (.cse4 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_126_44|)) (.cse5 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_133_44|)) (.cse6 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_129_44|)) (.cse7 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_132_44|)) (.cse8 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_128_44|)) (.cse9 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_140_44|)) (.cse10 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_138_44|)) (.cse11 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_143_44|)) (.cse12 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_145_44|)) (.cse13 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_144_44|)) (.cse14 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_134_44|)) (.cse15 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_142_44|)) (.cse16 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_136_44|)) (.cse17 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_127_44|)) (.cse18 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_123_44|)) (.cse19 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_146_44|)) (.cse20 (* 4294967295 |c_ULTIMATE.start_main_~s~0#1|)) (.cse21 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_139_44|)) (.cse22 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_135_44|)) (.cse23 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_131_44|)) (.cse24 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_137_44|)) (.cse25 (* 4294967295 |aux_mod_v_ULTIMATE.start_main_~v~0#1_130_44|))) (< (+ 255 (* (div (+ .cse0 (- 1) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15 .cse16 .cse17 .cse18 .cse19 .cse20 .cse21 .cse22 .cse23 .cse24 .cse25) 4294967296) 4294967296)) (+ .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8 .cse9 .cse10 .cse11 .cse12 .cse13 .cse14 .cse15 .cse16 .cse17 .cse18 .cse19 .cse20 .cse21 .cse22 .cse23 .cse24 .cse25))) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_123_44|) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_141_44|) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_140_44| 256) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_128_44|) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_129_44|) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_122_44|) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_123_44| 256) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_128_44| 256) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_142_44|) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_126_44|) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_134_44| 256) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_135_44|) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_131_44|) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_139_44| 256) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_141_44| 256) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_122_44| 256) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_145_44| 256) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_134_44|) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_132_44| 256) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_125_44| 256) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_140_44|) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_143_44|) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_133_44|) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_138_44|) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_130_44|) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_132_44|) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_126_44| 256) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_136_44| 256) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_125_44|) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_145_44|) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_129_44| 256) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_135_44| 256) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_146_44| 256) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_136_44|) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_127_44|) (> 0 |aux_mod_v_ULTIMATE.start_main_~v~0#1_146_44|) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_133_44| 256) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_137_44| 256) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_130_44| 256) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_124_44| 256) (>= |aux_mod_v_ULTIMATE.start_main_~v~0#1_144_44| 256))) is different from false