./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s4if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s4if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5fe0a71bff946f0cc68d0dab1416e0ef991c6bf06ad7cbb70643ca18073a3c7e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:16:52,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:16:52,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:16:52,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:16:52,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:16:52,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:16:52,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:16:52,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:16:52,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:16:52,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:16:52,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:16:52,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:16:52,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:16:52,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:16:52,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:16:52,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:16:52,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:16:52,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:16:52,693 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:16:52,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:16:52,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:16:52,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:16:52,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:16:52,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:16:52,705 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:16:52,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:16:52,706 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:16:52,707 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:16:52,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:16:52,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:16:52,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:16:52,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:16:52,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:16:52,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:16:52,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:16:52,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:16:52,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:16:52,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:16:52,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:16:52,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:16:52,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:16:52,725 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:16:52,752 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:16:52,753 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:16:52,753 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:16:52,754 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:16:52,754 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:16:52,755 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:16:52,755 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:16:52,755 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:16:52,756 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:16:52,756 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:16:52,756 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:16:52,757 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:16:52,757 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:16:52,757 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:16:52,757 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:16:52,758 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:16:52,758 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:16:52,758 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:16:52,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:16:52,760 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:16:52,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:16:52,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:16:52,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:16:52,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:16:52,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:16:52,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:16:52,761 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:16:52,762 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:16:52,762 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:16:52,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:16:52,763 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:16:52,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:16:52,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:16:52,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:16:52,764 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:16:52,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:16:52,764 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:16:52,765 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:16:52,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:16:52,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:16:52,765 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:16:52,766 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_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fe0a71bff946f0cc68d0dab1416e0ef991c6bf06ad7cbb70643ca18073a3c7e [2022-11-26 00:16:53,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:16:53,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:16:53,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:16:53,086 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:16:53,087 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:16:53,088 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-fpi/s4if.c [2022-11-26 00:16:56,171 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:16:56,443 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:16:56,444 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/sv-benchmarks/c/array-fpi/s4if.c [2022-11-26 00:16:56,451 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/data/89a480a87/d8bf6086d4a54dec9751bde92d649f61/FLAG7a0e51a2d [2022-11-26 00:16:56,478 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/data/89a480a87/d8bf6086d4a54dec9751bde92d649f61 [2022-11-26 00:16:56,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:16:56,488 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:16:56,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:16:56,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:16:56,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:16:56,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:16:56" (1/1) ... [2022-11-26 00:16:56,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10c173cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:56, skipping insertion in model container [2022-11-26 00:16:56,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:16:56" (1/1) ... [2022-11-26 00:16:56,509 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:16:56,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:16:56,775 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_d40b24ab-4110-4079-bc26-1ed5ff720e3e/sv-benchmarks/c/array-fpi/s4if.c[587,600] [2022-11-26 00:16:56,812 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:16:56,827 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:16:56,849 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_d40b24ab-4110-4079-bc26-1ed5ff720e3e/sv-benchmarks/c/array-fpi/s4if.c[587,600] [2022-11-26 00:16:56,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:16:56,890 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:16:56,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:56 WrapperNode [2022-11-26 00:16:56,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:16:56,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:16:56,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:16:56,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:16:56,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:56" (1/1) ... [2022-11-26 00:16:56,908 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:56" (1/1) ... [2022-11-26 00:16:56,930 INFO L138 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-11-26 00:16:56,931 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:16:56,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:16:56,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:16:56,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:16:56,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:56" (1/1) ... [2022-11-26 00:16:56,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:56" (1/1) ... [2022-11-26 00:16:56,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:56" (1/1) ... [2022-11-26 00:16:56,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:56" (1/1) ... [2022-11-26 00:16:56,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:56" (1/1) ... [2022-11-26 00:16:56,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:56" (1/1) ... [2022-11-26 00:16:56,958 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:56" (1/1) ... [2022-11-26 00:16:56,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:56" (1/1) ... [2022-11-26 00:16:56,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:16:56,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:16:56,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:16:56,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:16:56,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:56" (1/1) ... [2022-11-26 00:16:56,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:16:56,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:16:57,012 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:16:57,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:16:57,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:16:57,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:16:57,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:16:57,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-26 00:16:57,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:16:57,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:16:57,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:16:57,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-26 00:16:57,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:16:57,149 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:16:57,152 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:16:57,334 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:16:57,398 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:16:57,398 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-26 00:16:57,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:16:57 BoogieIcfgContainer [2022-11-26 00:16:57,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:16:57,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:16:57,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:16:57,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:16:57,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:16:56" (1/3) ... [2022-11-26 00:16:57,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55909ead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:16:57, skipping insertion in model container [2022-11-26 00:16:57,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:16:56" (2/3) ... [2022-11-26 00:16:57,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55909ead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:16:57, skipping insertion in model container [2022-11-26 00:16:57,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:16:57" (3/3) ... [2022-11-26 00:16:57,420 INFO L112 eAbstractionObserver]: Analyzing ICFG s4if.c [2022-11-26 00:16:57,466 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:16:57,466 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:16:57,561 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:16:57,570 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;@48d52b67, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:16:57,571 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:16:57,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:16:57,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:16:57,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:57,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:16:57,585 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:16:57,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:57,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1569409207, now seen corresponding path program 1 times [2022-11-26 00:16:57,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:57,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965071320] [2022-11-26 00:16:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:57,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:16:58,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:16:58,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965071320] [2022-11-26 00:16:58,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965071320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:16:58,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:16:58,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:16:58,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009724882] [2022-11-26 00:16:58,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:16:58,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:16:58,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:16:58,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:16:58,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:16:58,099 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:16:58,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:58,180 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2022-11-26 00:16:58,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:16:58,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 00:16:58,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:58,194 INFO L225 Difference]: With dead ends: 18 [2022-11-26 00:16:58,194 INFO L226 Difference]: Without dead ends: 8 [2022-11-26 00:16:58,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:16:58,201 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:58,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:16:58,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-11-26 00:16:58,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-11-26 00:16:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:16:58,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-11-26 00:16:58,244 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2022-11-26 00:16:58,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:58,245 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-11-26 00:16:58,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:16:58,245 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-11-26 00:16:58,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:16:58,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:58,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:16:58,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:16:58,247 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:16:58,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:58,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1413550180, now seen corresponding path program 1 times [2022-11-26 00:16:58,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:58,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310940772] [2022-11-26 00:16:58,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:58,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:16:58,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:16:58,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310940772] [2022-11-26 00:16:58,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310940772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:16:58,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:16:58,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:16:58,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158827108] [2022-11-26 00:16:58,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:16:58,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:16:58,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:16:58,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:16:58,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:16:58,374 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:16:58,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:58,400 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2022-11-26 00:16:58,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:16:58,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:16:58,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:58,402 INFO L225 Difference]: With dead ends: 12 [2022-11-26 00:16:58,402 INFO L226 Difference]: Without dead ends: 9 [2022-11-26 00:16:58,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:16:58,405 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:58,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 4 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:16:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-26 00:16:58,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-26 00:16:58,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:16:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-11-26 00:16:58,410 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2022-11-26 00:16:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:58,411 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-11-26 00:16:58,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:16:58,412 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-11-26 00:16:58,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:16:58,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:58,412 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:16:58,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:16:58,413 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:16:58,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:58,414 INFO L85 PathProgramCache]: Analyzing trace with hash -870274037, now seen corresponding path program 1 times [2022-11-26 00:16:58,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:16:58,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138479869] [2022-11-26 00:16:58,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:58,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:16:58,487 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:16:58,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37038611] [2022-11-26 00:16:58,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:58,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:16:58,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:16:58,535 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:16:58,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:16:58,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:58,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-26 00:16:58,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:58,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:16:58,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:16:58,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:16:59,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-26 00:16:59,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2022-11-26 00:16:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:16:59,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:16:59,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-26 00:16:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:16:59,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:16:59,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138479869] [2022-11-26 00:16:59,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:16:59,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37038611] [2022-11-26 00:16:59,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37038611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:16:59,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1402014335] [2022-11-26 00:16:59,685 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:16:59,688 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:16:59,694 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:16:59,701 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:16:59,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:16:59,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:59,809 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:16:59,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2022-11-26 00:16:59,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:59,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:59,947 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-26 00:16:59,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-26 00:16:59,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:59,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:16:59,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:00,103 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-26 00:17:00,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-26 00:17:00,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:00,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:00,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-11-26 00:17:00,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:00,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:00,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:00,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:00,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:00,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:00,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:00,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:00,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:00,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:00,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:00,546 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-11-26 00:17:00,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 32 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 434 treesize of output 423 [2022-11-26 00:17:00,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:17:00,750 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:17:00,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2022-11-26 00:17:00,797 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:17:00,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2022-11-26 00:17:00,943 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:00,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2022-11-26 00:17:01,055 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:01,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2022-11-26 00:17:01,104 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:01,648 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '138#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= (ite (= (* ~N~0 4) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-26 00:17:01,648 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:17:01,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:17:01,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-26 00:17:01,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675546409] [2022-11-26 00:17:01,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:17:01,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:17:01,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:01,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:17:01,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:17:01,651 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:01,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:01,813 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2022-11-26 00:17:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:17:01,815 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-26 00:17:01,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:01,816 INFO L225 Difference]: With dead ends: 15 [2022-11-26 00:17:01,816 INFO L226 Difference]: Without dead ends: 12 [2022-11-26 00:17:01,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:17:01,818 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:01,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 14 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:17:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-26 00:17:01,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2022-11-26 00:17:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:01,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-26 00:17:01,827 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2022-11-26 00:17:01,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:01,828 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-26 00:17:01,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:01,829 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-26 00:17:01,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:17:01,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:01,832 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:01,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:02,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:02,038 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:02,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:02,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1208582788, now seen corresponding path program 2 times [2022-11-26 00:17:02,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:02,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067708381] [2022-11-26 00:17:02,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:02,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:02,061 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:17:02,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1473323826] [2022-11-26 00:17:02,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:17:02,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:02,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:02,063 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:02,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:17:02,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:17:02,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:17:02,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:17:02,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:02,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:02,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:02,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:02,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067708381] [2022-11-26 00:17:02,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:17:02,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473323826] [2022-11-26 00:17:02,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473323826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:02,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1082365090] [2022-11-26 00:17:02,269 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:17:02,269 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:02,270 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:02,270 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:02,271 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:17:02,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:02,337 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:17:02,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2022-11-26 00:17:02,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:02,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:02,454 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-26 00:17:02,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-26 00:17:02,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:02,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:02,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:02,593 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-26 00:17:02,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-26 00:17:02,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:02,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:02,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-26 00:17:02,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:02,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:02,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:02,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:02,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:02,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:02,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:02,931 INFO L321 Elim1Store]: treesize reduction 186, result has 18.4 percent of original size [2022-11-26 00:17:02,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 429 treesize of output 424 [2022-11-26 00:17:03,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:17:03,237 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:17:03,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2022-11-26 00:17:03,296 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:17:03,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2022-11-26 00:17:03,393 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:03,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2022-11-26 00:17:03,468 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:03,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2022-11-26 00:17:03,545 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:04,015 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '239#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= (ite (= (* ~N~0 4) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-26 00:17:04,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:17:04,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:17:04,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-11-26 00:17:04,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111480449] [2022-11-26 00:17:04,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:17:04,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:17:04,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:04,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:17:04,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:17:04,021 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:04,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:04,112 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-11-26 00:17:04,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:17:04,113 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 00:17:04,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:04,113 INFO L225 Difference]: With dead ends: 20 [2022-11-26 00:17:04,114 INFO L226 Difference]: Without dead ends: 14 [2022-11-26 00:17:04,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:17:04,115 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:04,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 8 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:17:04,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-26 00:17:04,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2022-11-26 00:17:04,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:04,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-11-26 00:17:04,121 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 9 [2022-11-26 00:17:04,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:04,121 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-11-26 00:17:04,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:04,122 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-11-26 00:17:04,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:17:04,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:04,122 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:04,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:04,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:04,329 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:04,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:04,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1413604450, now seen corresponding path program 3 times [2022-11-26 00:17:04,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:04,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92942809] [2022-11-26 00:17:04,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:04,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:04,356 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:17:04,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448645819] [2022-11-26 00:17:04,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:17:04,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:04,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:04,372 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:04,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:17:04,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:17:04,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:17:04,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:17:04,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:04,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:04,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:04,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92942809] [2022-11-26 00:17:04,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:17:04,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448645819] [2022-11-26 00:17:04,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448645819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:04,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2144554874] [2022-11-26 00:17:04,544 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:17:04,544 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:04,544 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:04,545 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:04,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:17:04,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:04,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:04,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:04,661 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-26 00:17:04,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-26 00:17:04,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:04,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-26 00:17:04,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:04,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:04,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-26 00:17:04,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:04,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:04,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-26 00:17:04,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:04,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:04,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:04,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:04,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:04,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:04,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:05,003 INFO L321 Elim1Store]: treesize reduction 186, result has 18.4 percent of original size [2022-11-26 00:17:05,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 429 treesize of output 424 [2022-11-26 00:17:05,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:17:05,201 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:17:05,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2022-11-26 00:17:05,248 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:17:05,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2022-11-26 00:17:05,361 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:05,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2022-11-26 00:17:05,445 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:05,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2022-11-26 00:17:05,482 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:05,916 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '350#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= (ite (= (* ~N~0 4) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-26 00:17:05,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:17:05,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:17:05,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-26 00:17:05,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27445608] [2022-11-26 00:17:05,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:17:05,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:17:05,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:05,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:17:05,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:17:05,919 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:06,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:06,023 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2022-11-26 00:17:06,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:17:06,025 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 00:17:06,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:06,025 INFO L225 Difference]: With dead ends: 14 [2022-11-26 00:17:06,025 INFO L226 Difference]: Without dead ends: 11 [2022-11-26 00:17:06,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:17:06,027 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:06,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 8 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:17:06,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-26 00:17:06,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-26 00:17:06,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:06,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-26 00:17:06,031 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2022-11-26 00:17:06,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:06,031 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-26 00:17:06,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:06,032 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-26 00:17:06,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:17:06,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:06,032 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:06,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:06,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:06,233 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:06,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:06,233 INFO L85 PathProgramCache]: Analyzing trace with hash -871956407, now seen corresponding path program 4 times [2022-11-26 00:17:06,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:06,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877761301] [2022-11-26 00:17:06,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:06,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:06,248 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:17:06,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773605762] [2022-11-26 00:17:06,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:17:06,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:06,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:06,250 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:06,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:17:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:06,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-26 00:17:06,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:06,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:17:06,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:17:06,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-26 00:17:06,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:06,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-26 00:17:06,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 102 [2022-11-26 00:17:06,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2022-11-26 00:17:06,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2022-11-26 00:17:06,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-26 00:17:06,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 32 [2022-11-26 00:17:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:06,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:06,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-26 00:17:06,950 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse7 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse5 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse7 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (let ((.cse1 (* c_~N~0 4)) (.cse0 (+ .cse7 |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse2 (= .cse5 4))) (and (or (and (forall ((v_ArrVal_163 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_163) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) 4)) (forall ((v_ArrVal_163 (Array Int Int))) (= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_163) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) (select v_ArrVal_163 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) .cse1))) .cse2) (or (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse4 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (and (= .cse1 (+ .cse3 .cse4 .cse5)) (= .cse4 4))))) (not .cse2)))))) is different from false [2022-11-26 00:17:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-26 00:17:07,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:07,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877761301] [2022-11-26 00:17:07,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:17:07,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773605762] [2022-11-26 00:17:07,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773605762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:07,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [250120430] [2022-11-26 00:17:07,422 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:17:07,422 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:07,422 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:07,422 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:07,423 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:17:07,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:07,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:07,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:07,546 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-26 00:17:07,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-26 00:17:07,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:07,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:07,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-26 00:17:07,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:07,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-26 00:17:07,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:07,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:07,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-11-26 00:17:07,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:07,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:07,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:07,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:07,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:07,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:07,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:07,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:07,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:07,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:07,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:07,875 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-11-26 00:17:07,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 32 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 434 treesize of output 423 [2022-11-26 00:17:08,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:17:08,057 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:17:08,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2022-11-26 00:17:08,118 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:17:08,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2022-11-26 00:17:08,213 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:08,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2022-11-26 00:17:08,309 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:08,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2022-11-26 00:17:08,346 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:08,931 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '469#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= (ite (= (* ~N~0 4) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-26 00:17:08,932 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:17:08,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:17:08,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-11-26 00:17:08,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456748470] [2022-11-26 00:17:08,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:17:08,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 00:17:08,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:08,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 00:17:08,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=293, Unknown=1, NotChecked=34, Total=380 [2022-11-26 00:17:08,934 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 16 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:09,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:09,460 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-11-26 00:17:09,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:17:09,461 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-26 00:17:09,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:09,462 INFO L225 Difference]: With dead ends: 18 [2022-11-26 00:17:09,462 INFO L226 Difference]: Without dead ends: 15 [2022-11-26 00:17:09,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=71, Invalid=394, Unknown=1, NotChecked=40, Total=506 [2022-11-26 00:17:09,463 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:09,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 22 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 11 Unchecked, 0.2s Time] [2022-11-26 00:17:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-26 00:17:09,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2022-11-26 00:17:09,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:09,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-26 00:17:09,469 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2022-11-26 00:17:09,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:09,469 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-26 00:17:09,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:09,470 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-26 00:17:09,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:17:09,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:09,470 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:09,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:09,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:09,676 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:09,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:09,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1260736258, now seen corresponding path program 5 times [2022-11-26 00:17:09,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:09,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069186355] [2022-11-26 00:17:09,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:09,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:09,700 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:17:09,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383501340] [2022-11-26 00:17:09,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:17:09,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:09,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:09,711 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:09,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:17:09,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:17:09,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:17:09,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:17:09,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:09,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:09,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:09,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069186355] [2022-11-26 00:17:09,957 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:17:09,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383501340] [2022-11-26 00:17:09,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383501340] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:09,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1443191239] [2022-11-26 00:17:09,959 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:17:09,959 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:09,960 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:09,960 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:09,960 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:17:09,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:10,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:10,066 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-26 00:17:10,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-26 00:17:10,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:10,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:10,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:10,198 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-26 00:17:10,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-26 00:17:10,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:10,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-26 00:17:10,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:10,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:10,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-26 00:17:10,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:10,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:10,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:10,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:10,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:10,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:10,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:10,484 INFO L321 Elim1Store]: treesize reduction 186, result has 18.4 percent of original size [2022-11-26 00:17:10,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 429 treesize of output 424 [2022-11-26 00:17:10,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:17:10,749 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:17:10,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2022-11-26 00:17:10,801 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:17:10,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2022-11-26 00:17:10,882 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:10,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2022-11-26 00:17:10,948 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:10,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2022-11-26 00:17:11,005 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:11,477 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '600#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= (ite (= (* ~N~0 4) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-26 00:17:11,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:17:11,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:17:11,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-11-26 00:17:11,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405811501] [2022-11-26 00:17:11,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:17:11,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-26 00:17:11,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:11,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-26 00:17:11,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:17:11,479 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:11,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:11,600 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2022-11-26 00:17:11,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:17:11,601 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-26 00:17:11,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:11,602 INFO L225 Difference]: With dead ends: 23 [2022-11-26 00:17:11,602 INFO L226 Difference]: Without dead ends: 16 [2022-11-26 00:17:11,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:17:11,603 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:11,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 12 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:17:11,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-26 00:17:11,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2022-11-26 00:17:11,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:11,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-11-26 00:17:11,617 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 11 [2022-11-26 00:17:11,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:11,617 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-11-26 00:17:11,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:11,618 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-11-26 00:17:11,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:17:11,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:11,619 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:11,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:11,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:11,826 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:11,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:11,826 INFO L85 PathProgramCache]: Analyzing trace with hash 973526812, now seen corresponding path program 6 times [2022-11-26 00:17:11,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:11,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854822968] [2022-11-26 00:17:11,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:11,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:11,849 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:17:11,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089839881] [2022-11-26 00:17:11,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:17:11,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:11,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:11,867 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:11,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:17:11,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:17:11,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:17:11,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:17:11,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:12,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:12,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:12,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:12,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:12,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854822968] [2022-11-26 00:17:12,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:17:12,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089839881] [2022-11-26 00:17:12,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089839881] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:12,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1031994526] [2022-11-26 00:17:12,120 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:17:12,120 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:12,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:12,121 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:12,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:17:12,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:12,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:12,207 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-26 00:17:12,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-26 00:17:12,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:12,252 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:17:12,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2022-11-26 00:17:12,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:12,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:12,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:12,398 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-26 00:17:12,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-26 00:17:12,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:12,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:12,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-11-26 00:17:12,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:12,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:12,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:12,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:12,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:12,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:12,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:12,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:12,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:12,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:12,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:12,694 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-11-26 00:17:12,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 32 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 434 treesize of output 423 [2022-11-26 00:17:12,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:17:12,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:12,833 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-26 00:17:12,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 37 [2022-11-26 00:17:12,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:12,881 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-26 00:17:12,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 38 [2022-11-26 00:17:13,045 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:13,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2022-11-26 00:17:13,124 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:13,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2022-11-26 00:17:13,155 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:13,561 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '738#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= (ite (= (* ~N~0 4) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-26 00:17:13,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:17:13,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:17:13,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-26 00:17:13,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895260531] [2022-11-26 00:17:13,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:17:13,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:17:13,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:13,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:17:13,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:17:13,563 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:13,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:13,726 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2022-11-26 00:17:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:17:13,727 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-26 00:17:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:13,728 INFO L225 Difference]: With dead ends: 16 [2022-11-26 00:17:13,728 INFO L226 Difference]: Without dead ends: 13 [2022-11-26 00:17:13,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:17:13,730 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:13,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 14 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:17:13,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-26 00:17:13,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-26 00:17:13,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:13,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-11-26 00:17:13,736 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-11-26 00:17:13,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:13,736 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-11-26 00:17:13,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:13,736 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-11-26 00:17:13,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:17:13,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:13,737 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:13,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:13,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-26 00:17:13,937 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:13,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:13,938 INFO L85 PathProgramCache]: Analyzing trace with hash 114668683, now seen corresponding path program 7 times [2022-11-26 00:17:13,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:13,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343606684] [2022-11-26 00:17:13,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:13,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:13,956 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:17:13,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242139344] [2022-11-26 00:17:13,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:17:13,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:13,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:13,966 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:13,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:17:14,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:14,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-26 00:17:14,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:14,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:17:14,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:17:14,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-26 00:17:14,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:14,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-26 00:17:14,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:14,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:14,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-26 00:17:14,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 109 [2022-11-26 00:17:14,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2022-11-26 00:17:14,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:14,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:14,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2022-11-26 00:17:14,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 47 [2022-11-26 00:17:14,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 33 [2022-11-26 00:17:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:14,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:14,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-26 00:17:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:16,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:16,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343606684] [2022-11-26 00:17:16,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:17:16,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242139344] [2022-11-26 00:17:16,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242139344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:16,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1717558397] [2022-11-26 00:17:16,012 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:17:16,013 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:16,013 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:16,013 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:16,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:17:16,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:16,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:16,112 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-26 00:17:16,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-26 00:17:16,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:16,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:16,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:16,220 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-26 00:17:16,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-26 00:17:16,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:16,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-26 00:17:16,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:16,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:16,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-26 00:17:16,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:16,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:16,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:16,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:16,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:16,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:16,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:16,496 INFO L321 Elim1Store]: treesize reduction 186, result has 18.4 percent of original size [2022-11-26 00:17:16,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 429 treesize of output 424 [2022-11-26 00:17:16,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:17:16,714 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:17:16,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2022-11-26 00:17:16,767 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:17:16,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2022-11-26 00:17:16,862 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:16,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2022-11-26 00:17:16,949 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:16,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2022-11-26 00:17:17,001 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:17,712 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '883#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= (ite (= (* ~N~0 4) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-26 00:17:17,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:17:17,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:17:17,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-11-26 00:17:17,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795240334] [2022-11-26 00:17:17,713 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:17:17,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:17:17,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:17,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:17:17,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=486, Unknown=1, NotChecked=0, Total=552 [2022-11-26 00:17:17,714 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 20 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:19,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:19,070 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-11-26 00:17:19,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:17:19,071 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-26 00:17:19,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:19,071 INFO L225 Difference]: With dead ends: 25 [2022-11-26 00:17:19,071 INFO L226 Difference]: Without dead ends: 22 [2022-11-26 00:17:19,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=84, Invalid=617, Unknown=1, NotChecked=0, Total=702 [2022-11-26 00:17:19,076 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:19,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 23 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:17:19,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-26 00:17:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2022-11-26 00:17:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:19,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-26 00:17:19,085 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2022-11-26 00:17:19,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:19,086 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-26 00:17:19,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:19,086 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-11-26 00:17:19,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:17:19,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:19,087 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:19,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-26 00:17:19,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-26 00:17:19,293 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:19,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:19,293 INFO L85 PathProgramCache]: Analyzing trace with hash -740129540, now seen corresponding path program 8 times [2022-11-26 00:17:19,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:19,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396864797] [2022-11-26 00:17:19,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:19,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:19,308 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:17:19,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126256849] [2022-11-26 00:17:19,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:17:19,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:19,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:19,310 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:19,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:17:19,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:17:19,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:17:19,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:17:19,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:19,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:19,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:19,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396864797] [2022-11-26 00:17:19,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:17:19,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126256849] [2022-11-26 00:17:19,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126256849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:19,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [414496180] [2022-11-26 00:17:19,662 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:17:19,663 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:19,663 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:19,663 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:19,663 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:17:19,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:19,717 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:17:19,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2022-11-26 00:17:19,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:19,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:19,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:19,841 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-26 00:17:19,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-26 00:17:19,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:19,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:19,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-26 00:17:19,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:19,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:19,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-11-26 00:17:20,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:20,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:20,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:20,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:20,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:20,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:20,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:20,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:20,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:20,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:20,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:20,184 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-11-26 00:17:20,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 32 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 434 treesize of output 423 [2022-11-26 00:17:20,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:17:20,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:20,451 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-26 00:17:20,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 38 [2022-11-26 00:17:20,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:20,502 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-26 00:17:20,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 37 [2022-11-26 00:17:20,598 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:20,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2022-11-26 00:17:20,685 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:20,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2022-11-26 00:17:20,716 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:21,166 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1043#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= (ite (= (* ~N~0 4) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-26 00:17:21,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:17:21,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:17:21,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-11-26 00:17:21,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515131770] [2022-11-26 00:17:21,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:17:21,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-26 00:17:21,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:21,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-26 00:17:21,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-11-26 00:17:21,168 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:21,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:21,321 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-11-26 00:17:21,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:17:21,321 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:17:21,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:21,322 INFO L225 Difference]: With dead ends: 26 [2022-11-26 00:17:21,322 INFO L226 Difference]: Without dead ends: 18 [2022-11-26 00:17:21,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-11-26 00:17:21,323 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:21,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 14 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:17:21,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-26 00:17:21,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2022-11-26 00:17:21,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:21,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-11-26 00:17:21,332 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 13 [2022-11-26 00:17:21,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:21,332 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-11-26 00:17:21,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:21,333 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-11-26 00:17:21,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:17:21,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:21,334 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:21,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:21,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:17:21,534 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:21,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:21,535 INFO L85 PathProgramCache]: Analyzing trace with hash -197451106, now seen corresponding path program 9 times [2022-11-26 00:17:21,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:21,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060615877] [2022-11-26 00:17:21,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:21,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:21,550 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:17:21,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347537655] [2022-11-26 00:17:21,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:17:21,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:21,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:21,552 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:21,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:17:21,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:17:21,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:17:21,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:17:21,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:21,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:21,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:21,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:21,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060615877] [2022-11-26 00:17:21,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:17:21,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347537655] [2022-11-26 00:17:21,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347537655] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:21,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [198194503] [2022-11-26 00:17:21,888 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:17:21,889 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:21,889 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:21,889 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:21,889 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:17:21,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:21,980 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-26 00:17:21,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-26 00:17:21,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,079 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-26 00:17:22,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-26 00:17:22,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-26 00:17:22,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-26 00:17:22,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:22,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:22,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:22,366 INFO L321 Elim1Store]: treesize reduction 186, result has 18.4 percent of original size [2022-11-26 00:17:22,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 429 treesize of output 424 [2022-11-26 00:17:22,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:17:22,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:22,688 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-26 00:17:22,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 38 [2022-11-26 00:17:22,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:22,756 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-26 00:17:22,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 37 [2022-11-26 00:17:22,849 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:22,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2022-11-26 00:17:23,038 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:23,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2022-11-26 00:17:23,099 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:23,545 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1208#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= (ite (= (* ~N~0 4) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-26 00:17:23,546 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:17:23,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:17:23,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-26 00:17:23,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913635814] [2022-11-26 00:17:23,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:17:23,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-26 00:17:23,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:23,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-26 00:17:23,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:17:23,548 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:23,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:23,690 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2022-11-26 00:17:23,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:17:23,691 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:17:23,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:23,691 INFO L225 Difference]: With dead ends: 18 [2022-11-26 00:17:23,691 INFO L226 Difference]: Without dead ends: 15 [2022-11-26 00:17:23,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:17:23,693 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:23,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 6 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:17:23,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-26 00:17:23,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-26 00:17:23,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:23,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-11-26 00:17:23,701 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2022-11-26 00:17:23,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:23,701 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-11-26 00:17:23,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:23,702 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-11-26 00:17:23,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:17:23,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:23,703 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:23,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:23,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 00:17:23,909 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:23,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:23,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1825908407, now seen corresponding path program 10 times [2022-11-26 00:17:23,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:23,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135471058] [2022-11-26 00:17:23,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:23,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:23,939 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:17:23,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277181923] [2022-11-26 00:17:23,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:17:23,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:23,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:23,944 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:23,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:17:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:24,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-26 00:17:24,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:24,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:17:24,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:17:24,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-26 00:17:24,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-26 00:17:24,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:24,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:24,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-26 00:17:24,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:24,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:24,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:24,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2022-11-26 00:17:24,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:24,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:24,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:24,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2022-11-26 00:17:24,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 116 [2022-11-26 00:17:24,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2022-11-26 00:17:24,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:24,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 113 [2022-11-26 00:17:24,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2022-11-26 00:17:24,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2022-11-26 00:17:24,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 39 [2022-11-26 00:17:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:24,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:24,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-26 00:17:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:28,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:28,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135471058] [2022-11-26 00:17:28,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:17:28,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277181923] [2022-11-26 00:17:28,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277181923] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:28,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [506976809] [2022-11-26 00:17:28,316 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:17:28,316 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:28,317 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:28,317 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:28,317 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:17:28,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:28,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:28,403 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-26 00:17:28,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-26 00:17:28,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:28,440 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-26 00:17:28,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2022-11-26 00:17:28,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:28,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:28,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:28,561 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-26 00:17:28,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-26 00:17:28,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:28,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:28,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-26 00:17:28,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:28,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:28,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:28,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:28,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:28,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:28,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:28,815 INFO L321 Elim1Store]: treesize reduction 186, result has 18.4 percent of original size [2022-11-26 00:17:28,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 429 treesize of output 424 [2022-11-26 00:17:28,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:17:28,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:29,062 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-26 00:17:29,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 38 [2022-11-26 00:17:29,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:29,118 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-26 00:17:29,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 37 [2022-11-26 00:17:29,215 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:29,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2022-11-26 00:17:29,290 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:29,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2022-11-26 00:17:29,328 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:30,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1379#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= (ite (= (* ~N~0 4) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-26 00:17:30,271 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:17:30,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:17:30,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-11-26 00:17:30,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516619117] [2022-11-26 00:17:30,272 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:17:30,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:17:30,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:30,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:17:30,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=674, Unknown=5, NotChecked=0, Total=756 [2022-11-26 00:17:30,274 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 24 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:33,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:33,898 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-11-26 00:17:33,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:17:33,899 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-26 00:17:33,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:33,900 INFO L225 Difference]: With dead ends: 28 [2022-11-26 00:17:33,900 INFO L226 Difference]: Without dead ends: 25 [2022-11-26 00:17:33,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=96, Invalid=829, Unknown=5, NotChecked=0, Total=930 [2022-11-26 00:17:33,902 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:33,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 30 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-26 00:17:33,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-26 00:17:33,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2022-11-26 00:17:33,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:33,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-11-26 00:17:33,911 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2022-11-26 00:17:33,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:33,911 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-11-26 00:17:33,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:33,912 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-11-26 00:17:33,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:17:33,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:33,912 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:33,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:34,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:34,113 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:34,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:34,113 INFO L85 PathProgramCache]: Analyzing trace with hash -768477186, now seen corresponding path program 11 times [2022-11-26 00:17:34,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:34,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334651853] [2022-11-26 00:17:34,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:34,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:34,130 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:17:34,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337859018] [2022-11-26 00:17:34,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:17:34,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:34,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:34,133 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:34,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:17:34,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:17:34,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:17:34,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:17:34,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:34,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:34,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:34,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334651853] [2022-11-26 00:17:34,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:17:34,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337859018] [2022-11-26 00:17:34,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337859018] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:34,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [191978655] [2022-11-26 00:17:34,542 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:17:34,542 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:34,543 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:34,543 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:34,543 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:17:34,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:34,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:34,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:34,637 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-26 00:17:34,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-26 00:17:34,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:34,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-26 00:17:34,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:34,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:34,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2022-11-26 00:17:34,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:34,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:34,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-26 00:17:34,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:34,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:34,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:34,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:34,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:34,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:34,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:34,881 INFO L321 Elim1Store]: treesize reduction 186, result has 18.4 percent of original size [2022-11-26 00:17:34,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 429 treesize of output 424 [2022-11-26 00:17:35,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:17:35,056 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:17:35,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2022-11-26 00:17:35,099 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:17:35,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2022-11-26 00:17:35,181 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:35,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2022-11-26 00:17:35,239 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:35,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2022-11-26 00:17:35,280 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:35,803 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1564#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= (ite (= (* ~N~0 4) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-26 00:17:35,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:17:35,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:17:35,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2022-11-26 00:17:35,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148560853] [2022-11-26 00:17:35,804 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:17:35,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 00:17:35,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:35,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 00:17:35,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:17:35,806 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:36,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:36,025 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-11-26 00:17:36,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:17:36,032 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 00:17:36,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:36,032 INFO L225 Difference]: With dead ends: 29 [2022-11-26 00:17:36,032 INFO L226 Difference]: Without dead ends: 20 [2022-11-26 00:17:36,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 11 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:17:36,035 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:36,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 10 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:17:36,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-26 00:17:36,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2022-11-26 00:17:36,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:36,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-11-26 00:17:36,051 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 15 [2022-11-26 00:17:36,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:36,052 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-11-26 00:17:36,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:36,052 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-11-26 00:17:36,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:17:36,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:36,053 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:36,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:36,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 00:17:36,260 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:36,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1125314916, now seen corresponding path program 12 times [2022-11-26 00:17:36,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:36,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620730015] [2022-11-26 00:17:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:36,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:36,293 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:17:36,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485840260] [2022-11-26 00:17:36,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:17:36,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:36,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:36,298 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:36,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:17:36,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:17:36,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:17:36,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:17:36,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:36,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:36,694 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:36,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:17:36,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620730015] [2022-11-26 00:17:36,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:17:36,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485840260] [2022-11-26 00:17:36,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485840260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:36,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [644793023] [2022-11-26 00:17:36,697 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:17:36,697 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:17:36,697 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:17:36,697 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:17:36,698 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:17:36,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:36,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:36,785 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-26 00:17:36,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-26 00:17:36,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:36,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:36,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:36,891 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-26 00:17:36,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-26 00:17:36,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:36,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-26 00:17:36,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:36,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:36,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2022-11-26 00:17:37,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:37,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:37,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:37,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:37,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:37,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:17:37,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:37,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:37,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:37,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:37,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:37,124 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-11-26 00:17:37,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 32 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 434 treesize of output 423 [2022-11-26 00:17:37,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-26 00:17:37,277 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:17:37,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2022-11-26 00:17:37,333 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-26 00:17:37,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2022-11-26 00:17:37,405 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:37,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2022-11-26 00:17:37,467 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-26 00:17:37,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2022-11-26 00:17:37,513 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:17:37,980 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1756#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem13#1|) (= (ite (= (* ~N~0 4) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-26 00:17:37,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:17:37,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:17:37,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-26 00:17:37,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143244681] [2022-11-26 00:17:37,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-26 00:17:37,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 00:17:37,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:17:37,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 00:17:37,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:17:37,982 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:38,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:38,186 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-11-26 00:17:38,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:17:38,187 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 00:17:38,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:38,187 INFO L225 Difference]: With dead ends: 20 [2022-11-26 00:17:38,188 INFO L226 Difference]: Without dead ends: 17 [2022-11-26 00:17:38,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2022-11-26 00:17:38,189 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 14 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:38,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 10 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:17:38,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-26 00:17:38,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-26 00:17:38,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:38,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-11-26 00:17:38,200 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2022-11-26 00:17:38,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:38,201 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-11-26 00:17:38,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:38,201 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-11-26 00:17:38,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:17:38,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:38,202 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2022-11-26 00:17:38,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:38,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-26 00:17:38,409 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:17:38,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:38,409 INFO L85 PathProgramCache]: Analyzing trace with hash -524915445, now seen corresponding path program 13 times [2022-11-26 00:17:38,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:17:38,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462355609] [2022-11-26 00:17:38,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:17:38,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:17:38,425 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-26 00:17:38,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529807541] [2022-11-26 00:17:38,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:17:38,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:38,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:38,427 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:38,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:17:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:17:38,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-26 00:17:38,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:38,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-26 00:17:38,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:17:38,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-26 00:17:38,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-26 00:17:38,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:38,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:38,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-26 00:17:38,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:38,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:38,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:38,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:38,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:38,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 57 [2022-11-26 00:17:38,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:38,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:38,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:38,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:17:38,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 11 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 66 [2022-11-26 00:17:38,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 123 [2022-11-26 00:17:38,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2022-11-26 00:17:39,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 130 [2022-11-26 00:17:39,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 31 [2022-11-26 00:17:39,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2022-11-26 00:17:39,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 139 [2022-11-26 00:17:39,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 42 [2022-11-26 00:17:39,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 147 [2022-11-26 00:17:39,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 52 [2022-11-26 00:17:39,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 67 [2022-11-26 00:17:39,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 46 [2022-11-26 00:17:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:39,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:39,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-26 00:17:39,795 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse7 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse7 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (let ((.cse0 (* c_~N~0 4)) (.cse5 (+ .cse7 |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse6 (= .cse3 4))) (and (or (let ((.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse3))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5))) (and (= .cse0 (+ .cse1 .cse2 .cse3)) (= .cse2 4))))) (not .cse6)) (or (and (forall ((v_ArrVal_754 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) 4)) (forall ((v_ArrVal_754 (Array Int Int))) (= .cse0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) (select v_ArrVal_754 |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) .cse6))))) is different from false [2022-11-26 00:17:40,211 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse14 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse10 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse14 |c_ULTIMATE.start_main_~a~0#1.offset|))) (.cse4 (* c_~N~0 4)) (.cse1 (+ .cse14 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse3 (and (forall ((v_ArrVal_754 (Array Int Int))) (= .cse4 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1) (select v_ArrVal_754 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (forall ((v_ArrVal_754 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1) 4)))) (.cse2 (+ .cse14 |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse7 (= .cse10 4))) (and (or (and (forall ((v_ArrVal_750 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_750) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2))) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_750 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 (select v_ArrVal_750 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1) 4) (not (= .cse0 4))))) (or (forall ((v_ArrVal_750 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_750) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2) 4)) .cse3) (forall ((v_ArrVal_750 (Array Int Int))) (let ((.cse5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_750) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2))) (or (= .cse4 (let ((.cse6 (select v_ArrVal_750 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ .cse5 .cse6 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_750 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse5 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1)))) (not (= .cse5 4)))))) .cse7) (or (let ((.cse12 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse8 (select .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse9 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse10))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse2))) (let ((.cse13 (= .cse9 4))) (and (or (let ((.cse11 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse8 .cse9 .cse10))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (and (= .cse4 (+ .cse8 .cse9 .cse10 .cse11)) (= .cse11 4))) (not .cse13)) (or .cse3 .cse13)))))) (not .cse7)))))) is different from false [2022-11-26 00:17:42,891 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse22 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse4 (* c_~N~0 4)) (.cse10 (+ .cse22 12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse7 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse22 |c_ULTIMATE.start_main_~a~0#1.offset|))) (.cse1 (and (forall ((v_ArrVal_754 (Array Int Int))) (= .cse4 (+ (select v_ArrVal_754 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_main_~a~0#1.base|) .cse10)))) (forall ((v_ArrVal_754 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_main_~a~0#1.base|) .cse10) 4)))) (.cse11 (+ .cse22 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse13 (and (forall ((v_ArrVal_750 (Array Int Int))) (let ((.cse23 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_750) |c_ULTIMATE.start_main_~a~0#1.base|) .cse11))) (or (= (let ((.cse24 (select v_ArrVal_750 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ .cse23 .cse24 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_750 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse23 .cse24))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse10))) .cse4) (not (= .cse23 4))))) (or .cse1 (forall ((v_ArrVal_750 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_750) |c_ULTIMATE.start_main_~a~0#1.base|) .cse11) 4))) (forall ((v_ArrVal_750 (Array Int Int))) (let ((.cse25 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_750) |c_ULTIMATE.start_main_~a~0#1.base|) .cse11))) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_750 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse25 (select v_ArrVal_750 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse10) 4) (not (= .cse25 4))))))) (.cse14 (+ .cse22 |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse0 (= .cse7 4))) (and (or (not .cse0) (let ((.cse9 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse5 (select .cse9 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse6 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse5 .cse7))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14))) (let ((.cse12 (= .cse6 4))) (and (or (let ((.cse8 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse5 .cse6 .cse7))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse11))) (let ((.cse2 (= .cse8 4))) (and (or .cse1 .cse2) (or (not .cse2) (let ((.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse5 .cse6 .cse7 .cse8))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse10))) (and (= .cse3 4) (= .cse4 (+ .cse3 .cse5 .cse6 .cse7 .cse8)))))))) (not .cse12)) (or .cse13 .cse12))))))) (or (and (or .cse13 (forall ((v_ArrVal_748 (Array Int Int))) (= 4 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_748) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14)))) (or .cse1 (forall ((v_ArrVal_748 (Array Int Int))) (let ((.cse15 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_748) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14))) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ (select v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset|) .cse15))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse11) 4) (not (= 4 .cse15)))))) (forall ((v_ArrVal_748 (Array Int Int))) (let ((.cse17 (select v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse16 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_748) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14))) (let ((.cse18 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse17 .cse16))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse11))) (or (not (= 4 .cse16)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse17 .cse18 .cse16))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse10) 4) (not (= .cse18 4)))))) (forall ((v_ArrVal_748 (Array Int Int))) (let ((.cse20 (select v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse19 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_748) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14))) (let ((.cse21 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse20 .cse19))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse11))) (or (not (= 4 .cse19)) (= .cse4 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse20 .cse21 .cse19))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse10) .cse20 .cse21 .cse19)) (not (= .cse21 4))))))) .cse0)))))) is different from false [2022-11-26 00:17:46,830 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse31 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse11 (* c_~N~0 4)) (.cse13 (+ .cse31 16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse3 (and (forall ((v_ArrVal_754 (Array Int Int))) (= (+ (select v_ArrVal_754 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13)) .cse11)) (forall ((v_ArrVal_754 (Array Int Int))) (= 4 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_754) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13))))) (.cse14 (+ .cse31 12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse1 (and (or .cse3 (forall ((v_ArrVal_750 (Array Int Int))) (= 4 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_750) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14)))) (forall ((v_ArrVal_750 (Array Int Int))) (let ((.cse39 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_750) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14))) (or (not (= 4 .cse39)) (= 4 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_750 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ (select v_ArrVal_750 |c_ULTIMATE.start_main_~#sum~0#1.offset|) .cse39))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13))))) (forall ((v_ArrVal_750 (Array Int Int))) (let ((.cse41 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_750) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14))) (or (= .cse11 (let ((.cse40 (select v_ArrVal_750 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ .cse40 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_750 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse40 .cse41))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13) .cse41))) (not (= 4 .cse41))))))) (.cse15 (+ .cse31 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse9 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse31 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (let ((.cse18 (= .cse9 4)) (.cse16 (and (forall ((v_ArrVal_748 (Array Int Int))) (let ((.cse33 (select v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse34 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_748) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))) (let ((.cse32 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse33 .cse34))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14))) (or (not (= .cse32 4)) (= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse32 .cse33 .cse34))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13) .cse32 .cse33 .cse34) .cse11) (not (= 4 .cse34)))))) (or .cse3 (forall ((v_ArrVal_748 (Array Int Int))) (let ((.cse35 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_748) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ (select v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset|) .cse35))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14) 4) (not (= 4 .cse35)))))) (or (forall ((v_ArrVal_748 (Array Int Int))) (= 4 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_748) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))) .cse1) (forall ((v_ArrVal_748 (Array Int Int))) (let ((.cse37 (select v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse38 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_748) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))) (let ((.cse36 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse37 .cse38))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14))) (or (not (= .cse36 4)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_748 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse36 .cse37 .cse38))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13) 4) (not (= 4 .cse38)))))))) (.cse17 (+ .cse31 |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (and (or (let ((.cse12 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse7 (select .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse8 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse7 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse17))) (let ((.cse0 (= .cse8 4))) (and (or (not .cse0) (let ((.cse10 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse7 .cse8 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))) (let ((.cse2 (= .cse10 4))) (and (or .cse1 .cse2) (or (let ((.cse6 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse7 .cse8 .cse9 .cse10))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14))) (let ((.cse4 (= .cse6 4))) (and (or .cse3 .cse4) (or (not .cse4) (let ((.cse5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse6 .cse7 .cse8 .cse9 .cse10))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13))) (and (= .cse5 4) (= (+ .cse6 .cse5 .cse7 .cse8 .cse9 .cse10) .cse11))))))) (not .cse2)))))) (or .cse0 .cse16)))))) (not .cse18)) (or .cse18 (and (or (forall ((v_ArrVal_745 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_745) |c_ULTIMATE.start_main_~a~0#1.base|) .cse17) 4)) .cse16) (or .cse3 (forall ((v_ArrVal_745 (Array Int Int))) (let ((.cse19 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_745) |c_ULTIMATE.start_main_~a~0#1.base|) .cse17)) (.cse21 (select v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse20 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse19 .cse21))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))) (or (not (= .cse19 4)) (not (= .cse20 4)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse19 .cse20 .cse21))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14) 4)))))) (forall ((v_ArrVal_745 (Array Int Int))) (let ((.cse22 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_745) |c_ULTIMATE.start_main_~a~0#1.base|) .cse17)) (.cse25 (select v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse23 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse22 .cse25))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))) (let ((.cse24 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse22 .cse23 .cse25))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14))) (or (not (= .cse22 4)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse22 .cse23 .cse24 .cse25))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13) 4) (not (= .cse23 4)) (not (= .cse24 4))))))) (forall ((v_ArrVal_745 (Array Int Int))) (let ((.cse26 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_745) |c_ULTIMATE.start_main_~a~0#1.base|) .cse17)) (.cse29 (select v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse27 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse26 .cse29))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15))) (let ((.cse28 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse26 .cse27 .cse29))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse14))) (or (not (= .cse26 4)) (not (= .cse27 4)) (not (= .cse28 4)) (= (+ .cse26 .cse27 .cse28 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse26 .cse27 .cse28 .cse29))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13) .cse29) .cse11)))))) (or .cse1 (forall ((v_ArrVal_745 (Array Int Int))) (let ((.cse30 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_745) |c_ULTIMATE.start_main_~a~0#1.base|) .cse17))) (or (not (= .cse30 4)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse30 (select v_ArrVal_745 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse15) 4))))))))))))) is different from false [2022-11-26 00:18:50,122 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-11-26 00:18:50,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-11-26 00:18:50,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:18:50,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462355609] [2022-11-26 00:18:50,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:18:50,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529807541] [2022-11-26 00:18:50,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2022-11-26 00:18:50,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1087875388] [2022-11-26 00:18:50,126 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-26 00:18:50,126 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:18:50,126 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:18:50,126 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:18:50,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:18:50,129 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:314) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:273) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:221) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 44 more [2022-11-26 00:18:50,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:50,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2022-11-26 00:18:50,133 ERROR L170 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2022-11-26 00:18:50,133 INFO L360 BasicCegarLoop]: Counterexample might be feasible [2022-11-26 00:18:50,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-26 00:18:50,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:50,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 00:18:50,346 INFO L445 BasicCegarLoop]: Path program histogram: [13, 1, 1] [2022-11-26 00:18:50,349 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 00:18:50,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:18:50 BoogieIcfgContainer [2022-11-26 00:18:50,364 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 00:18:50,365 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 00:18:50,365 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 00:18:50,366 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 00:18:50,366 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:16:57" (3/4) ... [2022-11-26 00:18:50,370 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-26 00:18:50,370 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 00:18:50,370 INFO L158 Benchmark]: Toolchain (without parser) took 113882.37ms. Allocated memory was 188.7MB in the beginning and 394.3MB in the end (delta: 205.5MB). Free memory was 156.6MB in the beginning and 160.0MB in the end (delta: -3.4MB). Peak memory consumption was 204.7MB. Max. memory is 16.1GB. [2022-11-26 00:18:50,371 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 151.0MB. Free memory is still 91.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:18:50,371 INFO L158 Benchmark]: CACSL2BoogieTranslator took 401.44ms. Allocated memory is still 188.7MB. Free memory was 156.0MB in the beginning and 145.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:18:50,371 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.01ms. Allocated memory is still 188.7MB. Free memory was 144.8MB in the beginning and 143.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:18:50,371 INFO L158 Benchmark]: Boogie Preprocessor took 30.23ms. Allocated memory is still 188.7MB. Free memory was 143.5MB in the beginning and 142.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:18:50,372 INFO L158 Benchmark]: RCFGBuilder took 439.46ms. Allocated memory is still 188.7MB. Free memory was 142.0MB in the beginning and 127.4MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-26 00:18:50,372 INFO L158 Benchmark]: TraceAbstraction took 112959.94ms. Allocated memory was 188.7MB in the beginning and 394.3MB in the end (delta: 205.5MB). Free memory was 126.7MB in the beginning and 160.0MB in the end (delta: -33.3MB). Peak memory consumption was 175.3MB. Max. memory is 16.1GB. [2022-11-26 00:18:50,372 INFO L158 Benchmark]: Witness Printer took 4.78ms. Allocated memory is still 394.3MB. Free memory is still 160.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:18:50,374 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 151.0MB. Free memory is still 91.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 401.44ms. Allocated memory is still 188.7MB. Free memory was 156.0MB in the beginning and 145.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.01ms. Allocated memory is still 188.7MB. Free memory was 144.8MB in the beginning and 143.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 30.23ms. Allocated memory is still 188.7MB. Free memory was 143.5MB in the beginning and 142.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 439.46ms. Allocated memory is still 188.7MB. Free memory was 142.0MB in the beginning and 127.4MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 112959.94ms. Allocated memory was 188.7MB in the beginning and 394.3MB in the end (delta: 205.5MB). Free memory was 126.7MB in the beginning and 160.0MB in the end (delta: -33.3MB). Peak memory consumption was 175.3MB. Max. memory is 16.1GB. * Witness Printer took 4.78ms. Allocated memory is still 394.3MB. Free memory is still 160.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND TRUE !cond [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 0 [L32] i=0 [L32] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fe0a71bff946f0cc68d0dab1416e0ef991c6bf06ad7cbb70643ca18073a3c7e [2022-11-26 00:18:53,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:18:53,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:18:53,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:18:53,801 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:18:53,802 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:18:53,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/array-fpi/s4if.c [2022-11-26 00:18:57,054 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:18:57,298 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:18:57,299 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/sv-benchmarks/c/array-fpi/s4if.c [2022-11-26 00:18:57,310 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/data/98b06f569/e35b64aedc4149ef8a9e436fe5c53517/FLAGfe557d20e [2022-11-26 00:18:57,336 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/data/98b06f569/e35b64aedc4149ef8a9e436fe5c53517 [2022-11-26 00:18:57,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:18:57,341 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:18:57,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:18:57,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:18:57,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:18:57,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:18:57" (1/1) ... [2022-11-26 00:18:57,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59464fd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:57, skipping insertion in model container [2022-11-26 00:18:57,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:18:57" (1/1) ... [2022-11-26 00:18:57,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:18:57,392 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:18:57,628 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_d40b24ab-4110-4079-bc26-1ed5ff720e3e/sv-benchmarks/c/array-fpi/s4if.c[587,600] [2022-11-26 00:18:57,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:18:57,684 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:18:57,708 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_d40b24ab-4110-4079-bc26-1ed5ff720e3e/sv-benchmarks/c/array-fpi/s4if.c[587,600] [2022-11-26 00:18:57,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:18:57,767 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:18:57,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:57 WrapperNode [2022-11-26 00:18:57,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:18:57,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:18:57,770 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:18:57,770 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:18:57,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:57" (1/1) ... [2022-11-26 00:18:57,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:57" (1/1) ... [2022-11-26 00:18:57,844 INFO L138 Inliner]: procedures = 21, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2022-11-26 00:18:57,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:18:57,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:18:57,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:18:57,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:18:57,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:57" (1/1) ... [2022-11-26 00:18:57,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:57" (1/1) ... [2022-11-26 00:18:57,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:57" (1/1) ... [2022-11-26 00:18:57,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:57" (1/1) ... [2022-11-26 00:18:57,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:57" (1/1) ... [2022-11-26 00:18:57,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:57" (1/1) ... [2022-11-26 00:18:57,906 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:57" (1/1) ... [2022-11-26 00:18:57,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:57" (1/1) ... [2022-11-26 00:18:57,916 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:18:57,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:18:57,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:18:57,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:18:57,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:57" (1/1) ... [2022-11-26 00:18:57,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:18:57,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:18:57,961 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:18:57,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:18:58,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:18:58,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-26 00:18:58,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:18:58,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-11-26 00:18:58,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:18:58,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-26 00:18:58,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:18:58,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:18:58,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-11-26 00:18:58,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:18:58,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-26 00:18:58,130 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:18:58,133 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:18:58,420 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:18:58,427 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:18:58,428 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-26 00:18:58,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:18:58 BoogieIcfgContainer [2022-11-26 00:18:58,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:18:58,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:18:58,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:18:58,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:18:58,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:18:57" (1/3) ... [2022-11-26 00:18:58,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@491d10e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:18:58, skipping insertion in model container [2022-11-26 00:18:58,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:18:57" (2/3) ... [2022-11-26 00:18:58,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@491d10e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:18:58, skipping insertion in model container [2022-11-26 00:18:58,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:18:58" (3/3) ... [2022-11-26 00:18:58,443 INFO L112 eAbstractionObserver]: Analyzing ICFG s4if.c [2022-11-26 00:18:58,468 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:18:58,468 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:18:58,530 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:18:58,539 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;@39674768, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:18:58,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:18:58,545 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:58,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:18:58,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:58,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:58,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:58,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:58,561 INFO L85 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2022-11-26 00:18:58,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:18:58,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998160952] [2022-11-26 00:18:58,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:58,580 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:18:58,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:18:58,586 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:18:58,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-26 00:18:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:58,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-26 00:18:58,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:58,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:18:58,863 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:18:58,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998160952] [2022-11-26 00:18:58,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998160952] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:58,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:58,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:18:58,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717365583] [2022-11-26 00:18:58,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:58,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-26 00:18:58,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:18:58,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-26 00:18:58,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:18:58,928 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:58,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:58,952 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2022-11-26 00:18:58,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-26 00:18:58,954 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-26 00:18:58,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:58,964 INFO L225 Difference]: With dead ends: 34 [2022-11-26 00:18:58,964 INFO L226 Difference]: Without dead ends: 15 [2022-11-26 00:18:58,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-26 00:18:58,973 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:58,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:18:58,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-26 00:18:59,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-26 00:18:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:59,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-26 00:18:59,018 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2022-11-26 00:18:59,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:59,019 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-26 00:18:59,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:59,020 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-11-26 00:18:59,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:18:59,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:59,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:59,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:59,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:18:59,244 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:18:59,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:59,247 INFO L85 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2022-11-26 00:18:59,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:18:59,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872458797] [2022-11-26 00:18:59,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:59,254 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:18:59,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:18:59,255 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:18:59,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-26 00:18:59,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:59,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:18:59,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:59,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:18:59,645 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:18:59,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872458797] [2022-11-26 00:18:59,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872458797] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:59,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:59,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:18:59,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023318767] [2022-11-26 00:18:59,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:59,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:18:59,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:18:59,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:18:59,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:18:59,662 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:00,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:00,118 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-11-26 00:19:00,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:19:00,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-26 00:19:00,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:00,131 INFO L225 Difference]: With dead ends: 28 [2022-11-26 00:19:00,131 INFO L226 Difference]: Without dead ends: 20 [2022-11-26 00:19:00,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:19:00,133 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 37 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:00,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 8 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:19:00,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-26 00:19:00,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2022-11-26 00:19:00,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:00,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-11-26 00:19:00,145 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-11-26 00:19:00,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:00,146 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-11-26 00:19:00,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:00,147 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-11-26 00:19:00,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:19:00,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:00,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:00,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:00,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:19:00,363 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:00,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:00,364 INFO L85 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2022-11-26 00:19:00,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:19:00,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973541641] [2022-11-26 00:19:00,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:00,365 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:19:00,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:19:00,367 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:19:00,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-26 00:19:00,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:00,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-26 00:19:00,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:00,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:19:00,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:19:00,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-26 00:19:00,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:19:00,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-11-26 00:19:01,430 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:19:01,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 47 [2022-11-26 00:19:01,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:19:01,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 52 [2022-11-26 00:19:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:01,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:08,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:19:09,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:09,157 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:19:09,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973541641] [2022-11-26 00:19:09,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973541641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:19:09,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1744744106] [2022-11-26 00:19:09,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:09,162 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:19:09,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:19:09,178 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:19:09,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-26 00:19:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:09,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 00:19:09,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:09,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:19:09,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:09,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-26 00:19:09,757 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:19:09,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-11-26 00:19:09,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:09,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-11-26 00:19:10,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:10,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:10,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 51 [2022-11-26 00:19:11,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:11,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 52 [2022-11-26 00:19:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:11,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:18,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:18,580 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:19:18,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 79 [2022-11-26 00:19:18,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:19:18,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 43 [2022-11-26 00:19:18,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 29 [2022-11-26 00:19:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:18,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1744744106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:19:18,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388929435] [2022-11-26 00:19:18,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:19:18,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:18,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:18,659 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:18,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:19:18,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:19:18,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 00:19:18,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:18,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:19:18,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:19:18,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-26 00:19:18,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:19:19,645 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:19:19,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 51 [2022-11-26 00:19:22,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:19:22,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 52 [2022-11-26 00:19:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:22,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:29,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:19:29,201 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:19:29,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 124 treesize of output 85 [2022-11-26 00:19:29,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:19:29,224 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:19:29,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 43 [2022-11-26 00:19:29,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 29 [2022-11-26 00:19:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:29,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388929435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:19:29,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:19:29,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9, 10, 10, 11] total 37 [2022-11-26 00:19:29,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335216010] [2022-11-26 00:19:29,272 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:19:29,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-26 00:19:29,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:19:29,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-26 00:19:29,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1074, Unknown=18, NotChecked=0, Total=1332 [2022-11-26 00:19:29,277 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 37 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:42,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 00:19:44,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 00:19:45,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:45,214 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-11-26 00:19:45,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-26 00:19:45,215 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-26 00:19:45,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:45,217 INFO L225 Difference]: With dead ends: 35 [2022-11-26 00:19:45,217 INFO L226 Difference]: Without dead ends: 26 [2022-11-26 00:19:45,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=439, Invalid=1797, Unknown=20, NotChecked=0, Total=2256 [2022-11-26 00:19:45,220 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 65 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 15 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:45,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 45 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 277 Invalid, 2 Unknown, 0 Unchecked, 8.8s Time] [2022-11-26 00:19:45,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-26 00:19:45,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2022-11-26 00:19:45,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:45,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-26 00:19:45,234 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2022-11-26 00:19:45,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:45,235 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-26 00:19:45,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:45,236 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-26 00:19:45,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-26 00:19:45,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:45,239 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:45,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:45,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:45,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:45,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:45,854 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:45,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:45,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2022-11-26 00:19:45,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:19:45,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975716288] [2022-11-26 00:19:45,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:19:45,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:19:45,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:19:45,857 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:19:45,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-26 00:19:45,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:19:45,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:19:45,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:19:45,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:46,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:46,935 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:19:46,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975716288] [2022-11-26 00:19:46,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975716288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:19:46,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1224372943] [2022-11-26 00:19:46,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:19:46,936 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:19:46,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:19:46,937 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:19:46,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-26 00:19:47,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:19:47,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:19:47,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:19:47,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:47,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:47,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1224372943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:19:47,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563816731] [2022-11-26 00:19:47,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:19:47,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:47,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:47,479 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:47,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:19:47,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:19:47,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:19:47,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:19:47,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:47,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:48,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:48,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563816731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:19:48,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:19:48,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11, 9, 8, 7] total 25 [2022-11-26 00:19:48,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129319930] [2022-11-26 00:19:48,105 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:19:48,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 00:19:48,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:19:48,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 00:19:48,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:19:48,108 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:50,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:50,649 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2022-11-26 00:19:50,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:19:50,650 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-26 00:19:50,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:50,651 INFO L225 Difference]: With dead ends: 54 [2022-11-26 00:19:50,651 INFO L226 Difference]: Without dead ends: 47 [2022-11-26 00:19:50,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 00:19:50,654 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 185 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:50,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 20 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-26 00:19:50,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-26 00:19:50,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2022-11-26 00:19:50,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:50,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-11-26 00:19:50,667 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 18 [2022-11-26 00:19:50,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:50,668 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-11-26 00:19:50,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:50,668 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-11-26 00:19:50,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:19:50,669 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:50,669 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:50,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:50,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:51,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:51,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:19:51,271 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:51,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:51,271 INFO L85 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2022-11-26 00:19:51,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:19:51,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375553068] [2022-11-26 00:19:51,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:19:51,272 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:19:51,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:19:51,273 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:19:51,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-26 00:19:51,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:19:51,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:19:51,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:19:51,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:51,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:51,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:52,110 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:19:52,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375553068] [2022-11-26 00:19:52,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375553068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:19:52,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [399036353] [2022-11-26 00:19:52,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:19:52,110 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:19:52,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:19:52,117 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:19:52,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-26 00:19:52,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:19:52,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:19:52,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:19:52,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:52,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:52,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:52,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [399036353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:19:52,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32295652] [2022-11-26 00:19:52,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:19:52,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:52,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:52,527 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:52,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:19:52,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:19:52,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:19:52,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:19:52,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:52,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:52,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32295652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:19:52,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:19:52,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9, 7, 8, 7] total 17 [2022-11-26 00:19:52,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478162170] [2022-11-26 00:19:52,939 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:19:52,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 00:19:52,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:19:52,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 00:19:52,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:19:52,940 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:54,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:54,202 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2022-11-26 00:19:54,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:19:54,203 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-26 00:19:54,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:54,205 INFO L225 Difference]: With dead ends: 46 [2022-11-26 00:19:54,205 INFO L226 Difference]: Without dead ends: 34 [2022-11-26 00:19:54,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:19:54,207 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 70 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:54,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 16 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:19:54,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-26 00:19:54,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-11-26 00:19:54,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:54,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-11-26 00:19:54,221 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 19 [2022-11-26 00:19:54,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:54,222 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-11-26 00:19:54,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:54,222 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-11-26 00:19:54,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:19:54,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:54,223 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:19:54,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:54,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:54,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:54,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:54,833 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:19:54,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:54,834 INFO L85 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2022-11-26 00:19:54,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:19:54,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826612858] [2022-11-26 00:19:54,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:19:54,834 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:19:54,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:19:54,836 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:19:54,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-26 00:19:54,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:19:54,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:19:54,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-26 00:19:54,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:55,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:19:55,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:19:55,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-26 00:19:55,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:19:55,380 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:19:55,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-11-26 00:19:56,203 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-26 00:19:56,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 63 [2022-11-26 00:19:56,698 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:19:56,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 117 treesize of output 73 [2022-11-26 00:19:57,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:19:57,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 151 treesize of output 83 [2022-11-26 00:19:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:57,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:20:08,523 INFO L321 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2022-11-26 00:20:08,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 869 treesize of output 557 [2022-11-26 00:20:13,545 WARN L837 $PredicateComparison]: unable to prove that (or (let ((.cse0 ((_ sign_extend 32) (bvmul c_~N~0 (_ bv4 32)))) (.cse8 ((_ sign_extend 32) (_ bv4 32))) (.cse6 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse9 (bvmul (_ bv4 32) |c_ULTIMATE.start_main_~i~0#1|))) (let ((.cse11 (forall ((|ULTIMATE.start_main_~a~0#1.offset| (_ BitVec 32)) (v_arrayElimArr_3 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= .cse0 (let ((.cse18 (let ((.cse21 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_3))) (let ((.cse22 (select .cse21 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse23 (bvadd .cse8 (concat (select .cse22 .cse6) (select .cse22 |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (let ((.cse20 ((_ extract 31 0) .cse23)) (.cse19 ((_ extract 63 32) .cse23))) (bvadd (concat .cse19 .cse20) ((_ sign_extend 32) (select (select (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.base| (store (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse20) .cse6 .cse19)) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) |ULTIMATE.start_main_~a~0#1.offset|)))))))))) (concat ((_ extract 63 32) .cse18) ((_ extract 31 0) .cse18)))) (not (= (_ bv4 32) (select v_arrayElimArr_3 (bvadd (_ bv4 32) |ULTIMATE.start_main_~a~0#1.offset| .cse9))))))) (.cse10 (not (= (bvadd (_ bv4 32) .cse9) (_ bv0 32))))) (and (forall ((v_arrayElimArr_3 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~a~0#1.offset| (_ BitVec 32))) (or (= .cse0 (let ((.cse1 (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_3))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse7 (bvadd .cse8 (concat (select .cse5 .cse6) (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (let ((.cse3 ((_ extract 31 0) .cse7)) (.cse2 ((_ extract 63 32) .cse7))) (bvadd (concat .cse2 .cse3) ((_ sign_extend 32) (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse3) .cse6 .cse2)) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) |ULTIMATE.start_main_~a~0#1.offset|)))))))))) (concat ((_ extract 63 32) .cse1) ((_ extract 31 0) .cse1)))) (not (= (_ bv4 32) (select v_arrayElimArr_3 (bvadd (_ bv4 32) |ULTIMATE.start_main_~a~0#1.offset| .cse9)))) (not (= (_ bv4 32) (select v_arrayElimArr_3 |ULTIMATE.start_main_~a~0#1.offset|))))) (or .cse10 (and .cse11 (forall ((v_arrayElimArr_3 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~a~0#1.offset| (_ BitVec 32))) (or (= .cse0 (let ((.cse12 (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_3))) (let ((.cse16 (select .cse15 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse17 (bvadd .cse8 (concat (select .cse16 .cse6) (select .cse16 |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (let ((.cse14 ((_ extract 31 0) .cse17)) (.cse13 ((_ extract 63 32) .cse17))) (bvadd (concat .cse13 .cse14) ((_ sign_extend 32) (select (select (store .cse15 |c_ULTIMATE.start_main_~#sum~0#1.base| (store (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse14) .cse6 .cse13)) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) |ULTIMATE.start_main_~a~0#1.offset|)))))))))) (concat ((_ extract 63 32) .cse12) ((_ extract 31 0) .cse12)))) (not (= (_ bv4 32) (select v_arrayElimArr_3 (bvadd (_ bv4 32) |ULTIMATE.start_main_~a~0#1.offset| .cse9)))))))) (or .cse11 .cse10)))) (bvslt (bvadd (_ bv2 32) |c_ULTIMATE.start_main_~i~0#1|) c_~N~0) (not (bvslt (bvadd (_ bv1 32) |c_ULTIMATE.start_main_~i~0#1|) c_~N~0))) is different from false [2022-11-26 00:20:13,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:13,888 INFO L321 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-26 00:20:13,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 546 treesize of output 1 [2022-11-26 00:20:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-26 00:20:13,893 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:20:13,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826612858] [2022-11-26 00:20:13,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826612858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:20:13,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1196674786] [2022-11-26 00:20:13,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:20:13,894 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:20:13,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:20:13,896 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:20:13,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-26 00:20:14,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:20:14,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:20:14,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-26 00:20:14,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:20:14,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:14,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:14,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-26 00:20:14,683 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:20:14,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-11-26 00:20:14,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:14,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-11-26 00:20:15,378 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:20:15,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-11-26 00:20:15,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:15,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2022-11-26 00:20:18,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:18,717 INFO L321 Elim1Store]: treesize reduction 121, result has 17.1 percent of original size [2022-11-26 00:20:18,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 92 treesize of output 62 [2022-11-26 00:20:20,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:20,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:20,150 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-26 00:20:20,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 75 [2022-11-26 00:20:22,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:22,937 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-26 00:20:22,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 75 [2022-11-26 00:20:22,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:20:22,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:20:44,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:20:44,061 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-11-26 00:20:44,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 698 treesize of output 1 [2022-11-26 00:20:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:20:44,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1196674786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:20:44,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406445051] [2022-11-26 00:20:44,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:20:44,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:20:44,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:20:44,066 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:20:44,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:20:44,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:20:44,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:20:44,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-26 00:20:44,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:20:44,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:20:44,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:20:44,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-26 00:20:44,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:20:44,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:20:47,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:20:47,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 51 [2022-11-26 00:20:48,420 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-26 00:20:48,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 135 treesize of output 79 [2022-11-26 00:20:55,306 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-26 00:20:55,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 145 treesize of output 83 [2022-11-26 00:20:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:20:55,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:21:10,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:21:10,432 INFO L321 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-26 00:21:10,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 776 treesize of output 1 [2022-11-26 00:21:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:21:10,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406445051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:21:10,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:21:10,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13, 12, 14, 12] total 55 [2022-11-26 00:21:10,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4208391] [2022-11-26 00:21:10,436 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:21:10,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-26 00:21:10,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:21:10,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-26 00:21:10,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=2499, Unknown=24, NotChecked=104, Total=2970 [2022-11-26 00:21:10,440 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 55 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 55 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:21:55,505 WARN L233 SmtUtils]: Spent 36.38s on a formula simplification. DAG size of input: 165 DAG size of output: 158 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:22:06,131 WARN L233 SmtUtils]: Spent 7.83s on a formula simplification. DAG size of input: 83 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:22:14,237 WARN L233 SmtUtils]: Spent 7.51s on a formula simplification. DAG size of input: 76 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:22:17,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 00:22:19,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 00:22:26,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:22:29,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:22:32,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:23:23,109 WARN L233 SmtUtils]: Spent 47.78s on a formula simplification. DAG size of input: 246 DAG size of output: 109 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:23:25,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:23:27,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-26 00:24:49,955 WARN L233 SmtUtils]: Spent 1.26m on a formula simplification. DAG size of input: 202 DAG size of output: 143 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:24:58,459 WARN L233 SmtUtils]: Spent 7.37s on a formula simplification. DAG size of input: 154 DAG size of output: 83 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:26:21,094 WARN L233 SmtUtils]: Spent 1.25m on a formula simplification. DAG size of input: 236 DAG size of output: 209 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:26:33,635 WARN L233 SmtUtils]: Spent 8.12s on a formula simplification. DAG size of input: 188 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:26:34,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 00:28:04,183 WARN L233 SmtUtils]: Spent 1.36m on a formula simplification. DAG size of input: 238 DAG size of output: 211 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:28:04,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:04,720 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2022-11-26 00:28:04,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-26 00:28:04,722 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 55 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-26 00:28:04,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:04,723 INFO L225 Difference]: With dead ends: 52 [2022-11-26 00:28:04,723 INFO L226 Difference]: Without dead ends: 42 [2022-11-26 00:28:04,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 448.6s TimeCoverageRelationStatistics Valid=755, Invalid=4918, Unknown=31, NotChecked=148, Total=5852 [2022-11-26 00:28:04,726 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 116 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 52 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 28.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:04,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 110 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 705 Invalid, 6 Unknown, 34 Unchecked, 28.5s Time] [2022-11-26 00:28:04,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-26 00:28:04,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2022-11-26 00:28:04,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:04,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-11-26 00:28:04,739 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 21 [2022-11-26 00:28:04,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:04,740 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-11-26 00:28:04,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 55 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:04,740 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-11-26 00:28:04,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:28:04,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:04,741 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:04,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:04,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:05,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:05,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:05,356 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:28:05,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:05,357 INFO L85 PathProgramCache]: Analyzing trace with hash 692240447, now seen corresponding path program 1 times [2022-11-26 00:28:05,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:28:05,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452341553] [2022-11-26 00:28:05,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:05,357 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:28:05,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:28:05,358 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:28:05,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-26 00:28:05,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:05,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:28:05,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:05,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:28:05,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:28:05,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:28:05,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-26 00:28:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:05,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:06,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-26 00:28:06,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:28:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:06,572 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:28:06,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452341553] [2022-11-26 00:28:06,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452341553] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:06,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1734671727] [2022-11-26 00:28:06,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:06,572 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:28:06,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:28:06,574 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:28:06,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-26 00:28:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:06,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:28:06,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:07,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:28:07,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:07,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:28:07,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:28:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:07,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:08,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-26 00:28:08,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:28:08,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:08,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1734671727] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:08,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883104099] [2022-11-26 00:28:08,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:08,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:08,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:08,219 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:08,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-26 00:28:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:08,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:28:08,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:08,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:28:08,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:28:08,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:28:09,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:28:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:09,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:09,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-26 00:28:09,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-26 00:28:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:09,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883104099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:09,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:28:09,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 26 [2022-11-26 00:28:09,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480723919] [2022-11-26 00:28:09,506 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:28:09,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 00:28:09,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:28:09,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 00:28:09,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=541, Unknown=2, NotChecked=0, Total=650 [2022-11-26 00:28:09,508 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:11,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:11,599 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-11-26 00:28:11,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-26 00:28:11,611 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-26 00:28:11,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:11,612 INFO L225 Difference]: With dead ends: 46 [2022-11-26 00:28:11,612 INFO L226 Difference]: Without dead ends: 34 [2022-11-26 00:28:11,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=150, Invalid=718, Unknown=2, NotChecked=0, Total=870 [2022-11-26 00:28:11,613 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:11,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 55 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-26 00:28:11,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-26 00:28:11,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-11-26 00:28:11,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:11,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-11-26 00:28:11,625 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 21 [2022-11-26 00:28:11,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:11,626 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-11-26 00:28:11,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:11,626 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-11-26 00:28:11,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-26 00:28:11,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:11,627 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:11,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:11,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:12,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-26 00:28:12,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:12,228 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:28:12,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:12,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1315040515, now seen corresponding path program 2 times [2022-11-26 00:28:12,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:28:12,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377295702] [2022-11-26 00:28:12,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:28:12,230 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:28:12,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:28:12,231 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:28:12,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-26 00:28:12,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:28:12,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:28:12,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:28:12,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:12,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-26 00:28:12,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:28:12,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:28:12,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:28:12,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:12,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-26 00:28:12,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2022-11-26 00:28:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:28:12,910 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:28:12,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377295702] [2022-11-26 00:28:12,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377295702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:12,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [403523092] [2022-11-26 00:28:12,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:28:12,911 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:28:12,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:28:12,916 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:28:12,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-26 00:28:13,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:28:13,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915503559] [2022-11-26 00:28:13,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:28:13,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:13,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:13,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 1 [2022-11-26 00:28:13,167 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:13,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-26 00:28:13,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:28:13,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:28:13,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:28:13,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:13,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-26 00:28:13,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:13,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-26 00:28:13,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-26 00:28:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:28:13,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:13,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-26 00:28:14,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 126 [2022-11-26 00:28:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:28:14,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915503559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:14,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-26 00:28:14,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7, 8] total 15 [2022-11-26 00:28:14,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571918749] [2022-11-26 00:28:14,047 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-26 00:28:14,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-26 00:28:14,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:28:14,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-26 00:28:14,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:28:14,049 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:15,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:28:18,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:18,166 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-11-26 00:28:18,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:28:18,178 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-26 00:28:18,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:18,179 INFO L225 Difference]: With dead ends: 47 [2022-11-26 00:28:18,179 INFO L226 Difference]: Without dead ends: 29 [2022-11-26 00:28:18,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:28:18,181 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:18,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 49 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-26 00:28:18,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-26 00:28:18,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-11-26 00:28:18,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:18,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-11-26 00:28:18,189 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2022-11-26 00:28:18,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:18,190 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-11-26 00:28:18,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:18,190 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-11-26 00:28:18,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 00:28:18,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:18,191 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:18,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:18,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:18,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:28:18,595 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:28:18,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:18,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2132829117, now seen corresponding path program 5 times [2022-11-26 00:28:18,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:28:18,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005145710] [2022-11-26 00:28:18,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-26 00:28:18,596 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:28:18,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:28:18,597 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:28:18,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-26 00:28:18,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-26 00:28:18,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:28:18,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:28:18,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:19,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:19,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:20,412 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:20,413 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:28:20,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005145710] [2022-11-26 00:28:20,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005145710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:20,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1329439105] [2022-11-26 00:28:20,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-26 00:28:20,414 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:28:20,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:28:20,416 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:28:20,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-26 00:28:20,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-26 00:28:20,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:28:20,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:28:20,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:21,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:22,847 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:22,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1329439105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:22,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169034159] [2022-11-26 00:28:22,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-26 00:28:22,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:22,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:22,849 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:22,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-26 00:28:23,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-26 00:28:23,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:28:23,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:28:23,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:23,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:23,801 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:28:23,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169034159] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:23,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:28:23,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 13, 12, 14, 12] total 38 [2022-11-26 00:28:23,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937361251] [2022-11-26 00:28:23,802 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:28:23,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-26 00:28:23,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:28:23,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-26 00:28:23,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 00:28:23,804 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:27,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:28:27,528 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-11-26 00:28:27,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-26 00:28:27,529 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-26 00:28:27,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:28:27,530 INFO L225 Difference]: With dead ends: 57 [2022-11-26 00:28:27,530 INFO L226 Difference]: Without dead ends: 50 [2022-11-26 00:28:27,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=708, Invalid=2154, Unknown=0, NotChecked=0, Total=2862 [2022-11-26 00:28:27,532 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 175 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:28:27,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 25 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-26 00:28:27,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-26 00:28:27,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2022-11-26 00:28:27,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:27,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2022-11-26 00:28:27,548 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 23 [2022-11-26 00:28:27,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:28:27,549 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2022-11-26 00:28:27,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:27,549 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2022-11-26 00:28:27,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-26 00:28:27,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:28:27,551 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:28:27,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:27,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:27,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-26 00:28:28,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:28:28,159 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:28:28,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:28:28,160 INFO L85 PathProgramCache]: Analyzing trace with hash -2121994781, now seen corresponding path program 6 times [2022-11-26 00:28:28,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:28:28,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969725992] [2022-11-26 00:28:28,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-26 00:28:28,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:28:28,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:28:28,161 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:28:28,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-26 00:28:28,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-26 00:28:28,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:28:28,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-26 00:28:28,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:28,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:28:28,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:28,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-26 00:28:28,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:28:28,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:28:28,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:28:28,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:28:29,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:29,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 51 [2022-11-26 00:28:29,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:29,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 80 [2022-11-26 00:28:30,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:28:30,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:30,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:30,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:30,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:30,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:28:30,836 INFO L321 Elim1Store]: treesize reduction 68, result has 25.3 percent of original size [2022-11-26 00:28:30,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 144 treesize of output 111 [2022-11-26 00:28:31,557 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-11-26 00:28:31,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 170 treesize of output 130 [2022-11-26 00:28:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:28:31,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:50,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:50,688 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-11-26 00:28:50,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 3069 treesize of output 1 [2022-11-26 00:28:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:28:50,691 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:28:50,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969725992] [2022-11-26 00:28:50,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969725992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:50,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [104058678] [2022-11-26 00:28:50,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-26 00:28:50,692 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:28:50,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:28:50,693 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:28:50,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-26 00:28:50,858 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-26 00:28:50,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806520389] [2022-11-26 00:28:50,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-26 00:28:50,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:28:50,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:28:50,863 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:28:50,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 1 [2022-11-26 00:28:50,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40b24ab-4110-4079-bc26-1ed5ff720e3e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-26 00:28:51,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-26 00:28:51,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:28:51,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-26 00:28:51,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:51,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:28:51,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-26 00:28:51,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-26 00:28:51,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:28:51,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:28:51,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-26 00:28:52,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:28:52,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 51 [2022-11-26 00:28:53,552 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-26 00:28:53,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 123 treesize of output 75 [2022-11-26 00:28:54,810 INFO L321 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-26 00:28:54,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 168 treesize of output 115 [2022-11-26 00:28:56,377 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-26 00:28:56,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 188 treesize of output 142 [2022-11-26 00:28:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:28:56,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:29:39,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:29:39,922 INFO L321 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-11-26 00:29:39,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 3475 treesize of output 1 [2022-11-26 00:29:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 5 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:29:39,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806520389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:29:39,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-26 00:29:39,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17, 16] total 46 [2022-11-26 00:29:39,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534950219] [2022-11-26 00:29:39,927 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-26 00:29:39,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-26 00:29:39,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:29:39,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-26 00:29:39,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1775, Unknown=9, NotChecked=0, Total=2070 [2022-11-26 00:29:39,930 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 46 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 46 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:30:30,080 WARN L233 SmtUtils]: Spent 39.47s on a formula simplification. DAG size of input: 103 DAG size of output: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:30:44,168 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse21 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse16 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse24 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse17 (bvmul (_ bv4 32) |c_ULTIMATE.start_main_~i~0#1|)) (.cse39 (select .cse21 .cse16)) (.cse31 (select .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse23 (concat .cse39 .cse31)) (.cse42 (select .cse24 (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| .cse17)))) (let ((.cse54 (bvadd .cse23 ((_ sign_extend 32) .cse42)))) (let ((.cse53 ((_ extract 31 0) .cse54)) (.cse52 ((_ extract 63 32) .cse54))) (let ((.cse48 (store (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse53) .cse16 .cse52)) (.cse51 (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv4 32) .cse17))) (let ((.cse43 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| .cse48) |c_ULTIMATE.start_main_~a~0#1.base|) .cse51)) (.cse26 (concat .cse52 .cse53))) (let ((.cse40 (select .cse24 .cse51)) (.cse50 (bvadd ((_ sign_extend 32) .cse43) .cse26))) (let ((.cse47 ((_ extract 31 0) .cse50)) (.cse46 ((_ extract 63 32) .cse50)) (.cse38 (bvadd |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv8 32) .cse17)) (.cse49 (bvadd .cse23 ((_ sign_extend 32) .cse40)))) (let ((.cse28 (bvslt (bvadd (_ bv1 32) |c_ULTIMATE.start_main_~i~0#1|) c_~N~0)) (.cse29 (bvslt (bvadd (_ bv2 32) |c_ULTIMATE.start_main_~i~0#1|) c_~N~0)) (.cse37 ((_ extract 63 32) .cse49)) (.cse36 ((_ extract 31 0) .cse49)) (.cse14 ((_ sign_extend 32) (bvmul c_~N~0 (_ bv4 32)))) (.cse44 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store (store .cse48 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse47) .cse16 .cse46)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse38)) (.cse41 (concat .cse46 .cse47))) (let ((.cse1 (not (= (_ bv4 32) |c_ULTIMATE.start_main_#t~mem8#1|))) (.cse3 (= .cse14 (let ((.cse45 (bvadd ((_ sign_extend 32) .cse44) .cse41))) (concat ((_ extract 63 32) .cse45) ((_ extract 31 0) .cse45))))) (.cse5 (not (= (_ bv4 32) .cse44))) (.cse0 (not (= (_ bv4 32) .cse43))) (.cse25 (not (= (_ bv4 32) .cse42))) (.cse27 (not (bvslt |c_ULTIMATE.start_main_~i~0#1| c_~N~0))) (.cse30 (= .cse41 .cse14)) (.cse7 (bvule c_~N~0 (_ bv536870911 32))) (.cse32 (not (= (_ bv4 32) .cse40))) (.cse2 (bvslt (bvadd (_ bv3 32) |c_ULTIMATE.start_main_~i~0#1|) c_~N~0)) (.cse33 (concat .cse37 .cse36)) (.cse4 (not .cse29)) (.cse6 (not .cse28))) (and (or .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6) (or (and .cse7 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv1 32))) (and (not .cse7) (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32)))) (or (forall ((|ULTIMATE.start_main_~a~0#1.offset| (_ BitVec 32))) (let ((.cse10 (select .cse24 (bvadd |ULTIMATE.start_main_~a~0#1.offset| .cse17)))) (let ((.cse22 (bvadd ((_ sign_extend 32) .cse10) .cse23))) (let ((.cse20 ((_ extract 31 0) .cse22)) (.cse19 ((_ extract 63 32) .cse22))) (let ((.cse15 (store (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse20) .cse16 .cse19))) (let ((.cse9 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| .cse15) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv4 32) |ULTIMATE.start_main_~a~0#1.offset| .cse17)))) (let ((.cse18 (bvadd (concat .cse19 .cse20) ((_ sign_extend 32) .cse9)))) (let ((.cse13 ((_ extract 31 0) .cse18)) (.cse12 ((_ extract 63 32) .cse18))) (let ((.cse8 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store (store .cse15 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse13) .cse16 .cse12)) |c_ULTIMATE.start_main_~a~0#1.base|) (bvadd (_ bv8 32) |ULTIMATE.start_main_~a~0#1.offset| .cse17)))) (or (not (= (_ bv4 32) .cse8)) (not (= (_ bv4 32) .cse9)) (not (= (_ bv4 32) .cse10)) (= (let ((.cse11 (bvadd ((_ sign_extend 32) .cse8) (concat .cse12 .cse13)))) (concat ((_ extract 63 32) .cse11) ((_ extract 31 0) .cse11))) .cse14))))))))))) .cse2 .cse4 .cse6) (= |c_ULTIMATE.start_main_~#sum~0#1.offset| (_ bv0 32)) (or .cse25 (= .cse14 .cse26) .cse27 .cse28) (or .cse0 .cse1 .cse29 .cse30 .cse6) (not (bvsle c_~N~0 (_ bv0 32))) (or .cse0 .cse25 .cse2 .cse3 .cse4 .cse5 .cse6) (or .cse0 .cse25 .cse29 .cse27 .cse30 .cse6) (= |c_ULTIMATE.start_main_~a~0#1.offset| (_ bv0 32)) (= ((_ extract 31 0) (_ bv0 64)) .cse31) (not (= |c_ULTIMATE.start_main_~a~0#1.base| |c_ULTIMATE.start_main_~#sum~0#1.base|)) .cse7 (or .cse32 (= .cse33 .cse14) .cse29 .cse6) (let ((.cse34 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse36) .cse16 .cse37)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse38))) (or .cse32 (not (= (_ bv4 32) .cse34)) .cse2 (= (let ((.cse35 (bvadd ((_ sign_extend 32) .cse34) .cse33))) (concat ((_ extract 63 32) .cse35) ((_ extract 31 0) .cse35))) .cse14) .cse4 .cse6)) (= .cse39 ((_ extract 63 32) (_ bv0 64))))))))))))))) is different from true [2022-11-26 00:31:15,851 WARN L233 SmtUtils]: Spent 17.31s on a formula simplification. DAG size of input: 119 DAG size of output: 119 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:31:19,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:31:22,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []