./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound50.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound50.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c7a9d89991bb39658ba66b50d9cb80ba7d1aa37f87b1a2f7972fc25c15a1ea38 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 16:03:34,542 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 16:03:34,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 16:03:34,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 16:03:34,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 16:03:34,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 16:03:34,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 16:03:34,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 16:03:34,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 16:03:34,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 16:03:34,570 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 16:03:34,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 16:03:34,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 16:03:34,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 16:03:34,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 16:03:34,574 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 16:03:34,575 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 16:03:34,576 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 16:03:34,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 16:03:34,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 16:03:34,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 16:03:34,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 16:03:34,583 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 16:03:34,584 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 16:03:34,587 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 16:03:34,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 16:03:34,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 16:03:34,589 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 16:03:34,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 16:03:34,590 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 16:03:34,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 16:03:34,592 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 16:03:34,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 16:03:34,593 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 16:03:34,594 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 16:03:34,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 16:03:34,595 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 16:03:34,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 16:03:34,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 16:03:34,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 16:03:34,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 16:03:34,598 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 16:03:34,619 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 16:03:34,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 16:03:34,620 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 16:03:34,620 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 16:03:34,621 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 16:03:34,621 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 16:03:34,621 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 16:03:34,621 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 16:03:34,622 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 16:03:34,622 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 16:03:34,622 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 16:03:34,622 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 16:03:34,622 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 16:03:34,622 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 16:03:34,623 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 16:03:34,623 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 16:03:34,623 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 16:03:34,623 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 16:03:34,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 16:03:34,624 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 16:03:34,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 16:03:34,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 16:03:34,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 16:03:34,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 16:03:34,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 16:03:34,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 16:03:34,625 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 16:03:34,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 16:03:34,626 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 16:03:34,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 16:03:34,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 16:03:34,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 16:03:34,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 16:03:34,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 16:03:34,627 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 16:03:34,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 16:03:34,627 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 16:03:34,628 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 16:03:34,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 16:03:34,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 16:03:34,628 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 16:03:34,628 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_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7a9d89991bb39658ba66b50d9cb80ba7d1aa37f87b1a2f7972fc25c15a1ea38 [2022-12-14 16:03:34,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 16:03:34,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 16:03:34,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 16:03:34,836 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 16:03:34,836 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 16:03:34,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound50.i [2022-12-14 16:03:37,388 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 16:03:37,524 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 16:03:37,525 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound50.i [2022-12-14 16:03:37,530 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/data/decbbdce0/da1725c8389e41f0bc3f19b74573a616/FLAGce75e6764 [2022-12-14 16:03:37,542 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/data/decbbdce0/da1725c8389e41f0bc3f19b74573a616 [2022-12-14 16:03:37,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 16:03:37,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 16:03:37,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 16:03:37,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 16:03:37,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 16:03:37,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:03:37" (1/1) ... [2022-12-14 16:03:37,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a5ea7b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:37, skipping insertion in model container [2022-12-14 16:03:37,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:03:37" (1/1) ... [2022-12-14 16:03:37,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 16:03:37,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 16:03:37,670 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_00f73465-f6d0-4d74-a24b-46aa2c10bd06/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound50.i[950,963] [2022-12-14 16:03:37,680 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 16:03:37,687 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 16:03:37,696 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_00f73465-f6d0-4d74-a24b-46aa2c10bd06/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound50.i[950,963] [2022-12-14 16:03:37,700 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 16:03:37,710 INFO L208 MainTranslator]: Completed translation [2022-12-14 16:03:37,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:37 WrapperNode [2022-12-14 16:03:37,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 16:03:37,711 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 16:03:37,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 16:03:37,712 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 16:03:37,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:37" (1/1) ... [2022-12-14 16:03:37,723 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:37" (1/1) ... [2022-12-14 16:03:37,735 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-12-14 16:03:37,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 16:03:37,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 16:03:37,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 16:03:37,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 16:03:37,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:37" (1/1) ... [2022-12-14 16:03:37,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:37" (1/1) ... [2022-12-14 16:03:37,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:37" (1/1) ... [2022-12-14 16:03:37,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:37" (1/1) ... [2022-12-14 16:03:37,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:37" (1/1) ... [2022-12-14 16:03:37,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:37" (1/1) ... [2022-12-14 16:03:37,749 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:37" (1/1) ... [2022-12-14 16:03:37,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:37" (1/1) ... [2022-12-14 16:03:37,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 16:03:37,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 16:03:37,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 16:03:37,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 16:03:37,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:37" (1/1) ... [2022-12-14 16:03:37,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 16:03:37,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:03:37,776 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 16:03:37,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 16:03:37,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 16:03:37,809 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-14 16:03:37,809 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-14 16:03:37,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 16:03:37,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 16:03:37,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 16:03:37,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-12-14 16:03:37,810 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-12-14 16:03:37,868 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 16:03:37,870 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 16:03:37,974 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 16:03:37,996 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 16:03:37,996 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 16:03:37,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:03:37 BoogieIcfgContainer [2022-12-14 16:03:37,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 16:03:38,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 16:03:38,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 16:03:38,002 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 16:03:38,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:03:37" (1/3) ... [2022-12-14 16:03:38,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51092d7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:03:38, skipping insertion in model container [2022-12-14 16:03:38,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:03:37" (2/3) ... [2022-12-14 16:03:38,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51092d7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:03:38, skipping insertion in model container [2022-12-14 16:03:38,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:03:37" (3/3) ... [2022-12-14 16:03:38,005 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_valuebound50.i [2022-12-14 16:03:38,020 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 16:03:38,020 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 16:03:38,055 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 16:03:38,061 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;@13bedea2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 16:03:38,061 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 16:03:38,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 16:03:38,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 16:03:38,070 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:03:38,070 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:03:38,071 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:03:38,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:03:38,075 INFO L85 PathProgramCache]: Analyzing trace with hash 40099495, now seen corresponding path program 1 times [2022-12-14 16:03:38,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:03:38,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772217795] [2022-12-14 16:03:38,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:38,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:03:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:38,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:03:38,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772217795] [2022-12-14 16:03:38,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-12-14 16:03:38,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007279819] [2022-12-14 16:03:38,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:38,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:38,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:03:38,183 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:03:38,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 16:03:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:38,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-14 16:03:38,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 16:03:38,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:03:38,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007279819] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:03:38,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:03:38,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 16:03:38,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834551356] [2022-12-14 16:03:38,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:03:38,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 16:03:38,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:03:38,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 16:03:38,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 16:03:38,313 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 16:03:38,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:03:38,345 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2022-12-14 16:03:38,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 16:03:38,348 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 21 [2022-12-14 16:03:38,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:03:38,355 INFO L225 Difference]: With dead ends: 35 [2022-12-14 16:03:38,356 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 16:03:38,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 16:03:38,362 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:03:38,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:03:38,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 16:03:38,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 16:03:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 16:03:38,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-12-14 16:03:38,393 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 21 [2022-12-14 16:03:38,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:03:38,394 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-12-14 16:03:38,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 16:03:38,394 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-12-14 16:03:38,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 16:03:38,395 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:03:38,395 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:03:38,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 16:03:38,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-14 16:03:38,597 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:03:38,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:03:38,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2056079682, now seen corresponding path program 1 times [2022-12-14 16:03:38,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:03:38,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648096651] [2022-12-14 16:03:38,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:38,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:03:38,659 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 16:03:38,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851409640] [2022-12-14 16:03:38,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:38,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:38,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:03:38,666 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:03:38,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 16:03:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:38,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 16:03:38,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 16:03:38,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:03:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 16:03:39,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:03:39,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648096651] [2022-12-14 16:03:39,113 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 16:03:39,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851409640] [2022-12-14 16:03:39,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851409640] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 16:03:39,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:03:39,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2022-12-14 16:03:39,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93716759] [2022-12-14 16:03:39,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:03:39,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 16:03:39,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:03:39,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 16:03:39,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-14 16:03:39,116 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 16:03:39,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:03:39,223 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2022-12-14 16:03:39,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 16:03:39,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 22 [2022-12-14 16:03:39,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:03:39,224 INFO L225 Difference]: With dead ends: 33 [2022-12-14 16:03:39,224 INFO L226 Difference]: Without dead ends: 30 [2022-12-14 16:03:39,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-12-14 16:03:39,225 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:03:39,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 63 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 1 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:03:39,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-14 16:03:39,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-12-14 16:03:39,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 16:03:39,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-12-14 16:03:39,231 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 22 [2022-12-14 16:03:39,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:03:39,232 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-12-14 16:03:39,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 16:03:39,232 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-12-14 16:03:39,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 16:03:39,233 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:03:39,233 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:03:39,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 16:03:39,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 16:03:39,435 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:03:39,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:03:39,437 INFO L85 PathProgramCache]: Analyzing trace with hash 190159033, now seen corresponding path program 1 times [2022-12-14 16:03:39,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:03:39,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676734909] [2022-12-14 16:03:39,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:39,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:03:39,502 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 16:03:39,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824466092] [2022-12-14 16:03:39,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:39,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:39,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:03:39,509 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:03:39,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 16:03:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:39,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 16:03:39,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:39,800 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 16:03:39,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:03:39,980 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 16:03:39,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:03:39,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676734909] [2022-12-14 16:03:39,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 16:03:39,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824466092] [2022-12-14 16:03:39,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824466092] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 16:03:39,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:03:39,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2022-12-14 16:03:39,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635300392] [2022-12-14 16:03:39,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:03:39,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 16:03:39,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:03:39,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 16:03:39,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-12-14 16:03:39,983 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 16:03:40,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:03:40,066 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-12-14 16:03:40,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 16:03:40,067 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 24 [2022-12-14 16:03:40,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:03:40,067 INFO L225 Difference]: With dead ends: 40 [2022-12-14 16:03:40,068 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 16:03:40,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-12-14 16:03:40,069 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 16:03:40,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 79 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 16:03:40,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 16:03:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2022-12-14 16:03:40,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 16:03:40,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-12-14 16:03:40,078 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 24 [2022-12-14 16:03:40,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:03:40,079 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-12-14 16:03:40,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-14 16:03:40,079 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-12-14 16:03:40,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 16:03:40,080 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:03:40,080 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:03:40,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 16:03:40,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:40,281 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:03:40,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:03:40,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2136592426, now seen corresponding path program 1 times [2022-12-14 16:03:40,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:03:40,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774596583] [2022-12-14 16:03:40,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:40,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:03:40,346 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 16:03:40,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958129781] [2022-12-14 16:03:40,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:40,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:40,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:03:40,351 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:03:40,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 16:03:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:40,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 16:03:40,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 16:03:40,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:03:40,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:03:40,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774596583] [2022-12-14 16:03:40,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 16:03:40,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958129781] [2022-12-14 16:03:40,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958129781] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:03:40,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 16:03:40,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 16:03:40,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949271349] [2022-12-14 16:03:40,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:03:40,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:03:40,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:03:40,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:03:40,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:03:40,441 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 16:03:40,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:03:40,468 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2022-12-14 16:03:40,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:03:40,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2022-12-14 16:03:40,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:03:40,469 INFO L225 Difference]: With dead ends: 43 [2022-12-14 16:03:40,469 INFO L226 Difference]: Without dead ends: 30 [2022-12-14 16:03:40,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 16:03:40,470 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 16:03:40,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 16:03:40,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-14 16:03:40,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-12-14 16:03:40,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 16:03:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-12-14 16:03:40,476 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 29 [2022-12-14 16:03:40,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:03:40,476 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-12-14 16:03:40,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 16:03:40,476 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-12-14 16:03:40,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 16:03:40,477 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:03:40,477 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:03:40,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 16:03:40,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:40,678 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:03:40,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:03:40,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1183920689, now seen corresponding path program 1 times [2022-12-14 16:03:40,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:03:40,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765726428] [2022-12-14 16:03:40,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:40,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:03:40,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 16:03:40,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479253997] [2022-12-14 16:03:40,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:40,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:40,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:03:40,708 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:03:40,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 16:03:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:40,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 16:03:40,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 16:03:41,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:04:17,389 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse4 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) (.cse5 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (or (let ((.cse3 (* (* .cse4 |c_ULTIMATE.start_main_~q~0#1|) 2))) (let ((.cse0 (+ |c_ULTIMATE.start_main_~r~0#1| .cse3))) (let ((.cse2 (* (div .cse0 4294967296) 4294967296))) (and (< .cse0 (+ .cse1 .cse2 1)) (< (+ .cse1 .cse2) (+ |c_ULTIMATE.start_main_~r~0#1| .cse3 1)))))) (not (= (mod (+ (* 2 |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) .cse1)) (<= (* 2 .cse4) .cse5) (not (<= (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296) .cse5)))) is different from true [2022-12-14 16:04:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 2 not checked. [2022-12-14 16:04:31,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:04:31,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765726428] [2022-12-14 16:04:31,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 16:04:31,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479253997] [2022-12-14 16:04:31,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479253997] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:04:31,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [463303252] [2022-12-14 16:04:31,699 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 16:04:31,699 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:04:31,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:04:31,705 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:04:31,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:04:32,359 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-12-14 16:04:32,378 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 47 for LOIs [2022-12-14 16:04:32,388 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:04:50,858 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1049#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 16:04:50,858 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:04:50,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 16:04:50,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2022-12-14 16:04:50,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569660759] [2022-12-14 16:04:50,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 16:04:50,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 16:04:50,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:04:50,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 16:04:50,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=911, Unknown=7, NotChecked=62, Total=1122 [2022-12-14 16:04:50,860 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 6 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 16:04:52,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-12-14 16:04:54,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:04:56,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:05:00,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:05:02,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:05:04,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:05:04,940 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-12-14 16:05:04,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 16:05:04,941 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 6 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 31 [2022-12-14 16:05:04,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:05:04,942 INFO L225 Difference]: With dead ends: 40 [2022-12-14 16:05:04,942 INFO L226 Difference]: Without dead ends: 36 [2022-12-14 16:05:04,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=207, Invalid=1350, Unknown=7, NotChecked=76, Total=1640 [2022-12-14 16:05:04,944 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 15 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2022-12-14 16:05:04,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 96 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 210 Invalid, 2 Unknown, 33 Unchecked, 12.8s Time] [2022-12-14 16:05:04,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-14 16:05:04,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-12-14 16:05:04,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 16:05:04,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-12-14 16:05:04,951 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 31 [2022-12-14 16:05:04,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:05:04,951 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-12-14 16:05:04,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 17 states have internal predecessors, (31), 6 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 16:05:04,951 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-12-14 16:05:04,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 16:05:04,952 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:05:04,952 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:05:04,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 16:05:05,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:05:05,153 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:05:05,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:05:05,154 INFO L85 PathProgramCache]: Analyzing trace with hash 953799673, now seen corresponding path program 2 times [2022-12-14 16:05:05,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:05:05,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978085097] [2022-12-14 16:05:05,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:05:05,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:05:05,167 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 16:05:05,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874451778] [2022-12-14 16:05:05,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:05:05,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:05:05,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:05:05,168 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:05:05,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 16:05:05,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 16:05:05,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:05:05,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 16:05:05,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:05:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 16:05:09,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:05:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 16:05:10,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:05:10,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978085097] [2022-12-14 16:05:10,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 16:05:10,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874451778] [2022-12-14 16:05:10,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874451778] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:05:10,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1180600628] [2022-12-14 16:05:10,019 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 16:05:10,019 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:05:10,019 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:05:10,019 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:05:10,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:05:10,608 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-12-14 16:05:10,626 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 47 for LOIs [2022-12-14 16:05:10,634 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:05:11,747 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1420#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 16:05:11,747 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:05:11,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 16:05:11,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2022-12-14 16:05:11,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992234626] [2022-12-14 16:05:11,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 16:05:11,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 16:05:11,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:05:11,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 16:05:11,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-12-14 16:05:11,750 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-14 16:05:14,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:05:14,787 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2022-12-14 16:05:14,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 16:05:14,788 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 38 [2022-12-14 16:05:14,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:05:14,789 INFO L225 Difference]: With dead ends: 52 [2022-12-14 16:05:14,789 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 16:05:14,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-12-14 16:05:14,790 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-14 16:05:14,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 67 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-14 16:05:14,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 16:05:14,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-12-14 16:05:14,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 16:05:14,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-12-14 16:05:14,797 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 38 [2022-12-14 16:05:14,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:05:14,797 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-12-14 16:05:14,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-14 16:05:14,797 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-12-14 16:05:14,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 16:05:14,798 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:05:14,798 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:05:14,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 16:05:14,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:05:14,999 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:05:15,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:05:15,001 INFO L85 PathProgramCache]: Analyzing trace with hash 493314036, now seen corresponding path program 3 times [2022-12-14 16:05:15,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:05:15,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722899785] [2022-12-14 16:05:15,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:05:15,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:05:15,036 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 16:05:15,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340714208] [2022-12-14 16:05:15,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 16:05:15,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:05:15,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:05:15,038 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:05:15,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 16:05:22,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 16:05:22,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:05:22,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 16:05:22,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:05:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 16:05:29,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:05:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 16:05:52,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:05:52,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722899785] [2022-12-14 16:05:52,769 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 16:05:52,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340714208] [2022-12-14 16:05:52,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340714208] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:05:52,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [257396839] [2022-12-14 16:05:52,771 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 16:05:52,771 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:05:52,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:05:52,771 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:05:52,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:05:53,365 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2022-12-14 16:05:53,391 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 47 for LOIs [2022-12-14 16:05:53,398 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 16:05:59,437 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1830#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 16:05:59,437 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 16:05:59,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 16:05:59,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2022-12-14 16:05:59,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523566760] [2022-12-14 16:05:59,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 16:05:59,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 16:05:59,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:05:59,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 16:05:59,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1096, Unknown=4, NotChecked=0, Total=1260 [2022-12-14 16:05:59,440 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-12-14 16:06:03,740 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse11 (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296)) (.cse19 (mod |c_ULTIMATE.start_main_~b~0#1| 2147483648)) (.cse10 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (let ((.cse8 (<= (* 2 .cse19) .cse10)) (.cse9 (not (<= .cse11 .cse10))) (.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296)) (.cse15 (div .cse11 2))) (and (<= .cse0 50) (let ((.cse6 (mod |c_ULTIMATE.start_main_~b~0#1| 1073741824))) (let ((.cse7 (mod .cse6 2147483648))) (let ((.cse2 (* .cse7 2))) (or (= .cse1 .cse2) (let ((.cse3 (* 4 (* .cse7 |c_ULTIMATE.start_main_~q~0#1|)))) (let ((.cse4 (* (div (+ (* (- 2) .cse6) .cse3 |c_ULTIMATE.start_main_~r~0#1| .cse2) 4294967296) 4294967296)) (.cse5 (* 2 .cse6))) (and (< (+ .cse3 |c_ULTIMATE.start_main_~r~0#1| .cse2) (+ .cse4 .cse0 .cse5 1)) (< (+ .cse4 .cse0 .cse5) (+ .cse3 |c_ULTIMATE.start_main_~r~0#1| .cse2 1))))) (not .cse8) .cse9 (<= (* .cse6 4) .cse10))))) (= .cse0 (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~q~0#1|)) 4294967296)) (< .cse1 2147483647) (or (= .cse11 .cse1) (let ((.cse14 (* 2 (* .cse15 |c_ULTIMATE.start_main_~q~0#1|)))) (let ((.cse12 (+ .cse14 |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse13 (* (div .cse12 4294967296) 4294967296))) (and (< .cse12 (+ .cse0 .cse13 1)) (< (+ .cse0 .cse13) (+ .cse14 |c_ULTIMATE.start_main_~r~0#1| 1))))))) (<= 1 .cse1) (let ((.cse21 (mod .cse19 4294967296))) (or (let ((.cse20 (div .cse21 2))) (let ((.cse16 (* 2 .cse20)) (.cse17 (* (* .cse20 |c_ULTIMATE.start_main_~q~0#1|) 4))) (let ((.cse18 (* (div (+ (- .cse19) .cse16 |c_ULTIMATE.start_main_~r~0#1| .cse17) 4294967296) 4294967296))) (and (< (+ .cse16 |c_ULTIMATE.start_main_~r~0#1| .cse17) (+ .cse0 .cse18 .cse19 1)) (< (+ .cse0 .cse18 .cse19) (+ .cse16 |c_ULTIMATE.start_main_~r~0#1| .cse17 1)))))) .cse8 .cse9 (= .cse1 .cse21))) (let ((.cse29 (mod .cse15 4294967296))) (or (let ((.cse28 (div .cse29 2))) (let ((.cse25 (<= .cse29 .cse10)) (.cse23 (* 4 (* .cse28 |c_ULTIMATE.start_main_~q~0#1|)))) (and (or (let ((.cse24 (+ .cse23 |c_ULTIMATE.start_main_~r~0#1|))) (let ((.cse22 (* (div .cse24 4294967296) 4294967296))) (and (< (+ .cse22 .cse0) (+ .cse23 |c_ULTIMATE.start_main_~r~0#1| 1)) (< .cse24 (+ .cse22 .cse0 1))))) .cse25) (or (not .cse25) (let ((.cse26 (* .cse28 2))) (let ((.cse27 (* (div (+ .cse26 .cse23 (- .cse15) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) 4294967296))) (and (< (+ .cse26 .cse23 |c_ULTIMATE.start_main_~r~0#1|) (+ .cse0 .cse27 .cse15 1)) (< (+ .cse0 .cse27 .cse15) (+ .cse26 .cse23 |c_ULTIMATE.start_main_~r~0#1| 1))))))))) (= .cse29 .cse1)))))) is different from false [2022-12-14 16:06:27,293 WARN L233 SmtUtils]: Spent 11.98s on a formula simplification that was a NOOP. DAG size: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:07:06,445 WARN L233 SmtUtils]: Spent 29.28s on a formula simplification that was a NOOP. DAG size: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:07:08,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:07:11,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:07:20,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:07:21,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:07:24,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:07:26,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:07:28,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:07:31,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:07:52,956 WARN L233 SmtUtils]: Spent 7.97s on a formula simplification. DAG size of input: 59 DAG size of output: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:07:54,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:08:20,397 WARN L233 SmtUtils]: Spent 12.56s on a formula simplification. DAG size of input: 78 DAG size of output: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:08:22,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:08:25,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:08:38,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:08:40,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:08:42,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:08:43,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:08:45,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:08:48,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:09:23,561 WARN L233 SmtUtils]: Spent 30.90s on a formula simplification. DAG size of input: 77 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:09:25,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:09:27,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:09:30,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:09:32,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:09:35,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:09:38,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:09:40,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:09:41,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:09:43,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-12-14 16:09:46,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:09:46,537 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2022-12-14 16:09:46,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 16:09:46,538 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) Word has length 40 [2022-12-14 16:09:46,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:09:46,538 INFO L225 Difference]: With dead ends: 77 [2022-12-14 16:09:46,538 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 16:09:46,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 189.6s TimeCoverageRelationStatistics Valid=239, Invalid=1633, Unknown=24, NotChecked=84, Total=1980 [2022-12-14 16:09:46,539 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 28 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 63.2s IncrementalHoareTripleChecker+Time [2022-12-14 16:09:46,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 150 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 308 Invalid, 17 Unknown, 1 Unchecked, 63.2s Time] [2022-12-14 16:09:46,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 16:09:46,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2022-12-14 16:09:46,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 48 states have internal predecessors, (51), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 16:09:46,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2022-12-14 16:09:46,560 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 40 [2022-12-14 16:09:46,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:09:46,560 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2022-12-14 16:09:46,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 9 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-12-14 16:09:46,560 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2022-12-14 16:09:46,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 16:09:46,561 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:09:46,561 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:09:46,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 16:09:46,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 16:09:46,763 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:09:46,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:09:46,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1417331559, now seen corresponding path program 4 times [2022-12-14 16:09:46,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:09:46,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675291027] [2022-12-14 16:09:46,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:09:46,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:09:46,797 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 16:09:46,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1522373929] [2022-12-14 16:09:46,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 16:09:46,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:09:46,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:09:46,799 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:09:46,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00f73465-f6d0-4d74-a24b-46aa2c10bd06/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 16:14:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:14:45,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 16:14:45,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:14:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 16:14:52,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 16:15:42,517 WARN L233 SmtUtils]: Spent 22.75s on a formula simplification. DAG size of input: 59 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:16:24,753 WARN L233 SmtUtils]: Spent 9.28s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:17:09,875 WARN L233 SmtUtils]: Spent 13.24s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:17:54,473 WARN L233 SmtUtils]: Spent 12.75s on a formula simplification. DAG size of input: 57 DAG size of output: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:18:17,952 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 16:18:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 16:18:28,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:18:28,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675291027] [2022-12-14 16:18:28,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 16:18:28,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522373929] [2022-12-14 16:18:28,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522373929] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 16:18:28,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [518756811] [2022-12-14 16:18:28,416 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-12-14 16:18:28,416 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 16:18:28,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 16:18:28,417 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 16:18:28,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 16:18:28,954 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 25 for LOIs [2022-12-14 16:18:28,970 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 47 for LOIs [2022-12-14 16:18:28,976 INFO L180 IcfgInterpreter]: Interpretation finished