./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/res1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/res1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI --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 f274a5aba9f5a53aba1b5bf0fd0b9cf2990c13e825cbbe6f7043cc6fa5a18df6 --- 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-5e519f3 [2022-11-03 03:28:10,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:28:10,999 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:28:11,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:28:11,025 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:28:11,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:28:11,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:28:11,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:28:11,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:28:11,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:28:11,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:28:11,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:28:11,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:28:11,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:28:11,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:28:11,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:28:11,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:28:11,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:28:11,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:28:11,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:28:11,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:28:11,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:28:11,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:28:11,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:28:11,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:28:11,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:28:11,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:28:11,072 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:28:11,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:28:11,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:28:11,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:28:11,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:28:11,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:28:11,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:28:11,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:28:11,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:28:11,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:28:11,082 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:28:11,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:28:11,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:28:11,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:28:11,086 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:28:11,122 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:28:11,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:28:11,123 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:28:11,124 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:28:11,125 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:28:11,125 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:28:11,125 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:28:11,125 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:28:11,126 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:28:11,126 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:28:11,127 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:28:11,127 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:28:11,127 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:28:11,127 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:28:11,128 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:28:11,128 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:28:11,128 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:28:11,128 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:28:11,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:28:11,130 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:28:11,130 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:28:11,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:28:11,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:28:11,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:28:11,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:28:11,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:28:11,132 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:28:11,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:28:11,133 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:28:11,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:28:11,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:28:11,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:28:11,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:28:11,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:28:11,135 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:28:11,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:28:11,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:28:11,135 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:28:11,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:28:11,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:28:11,136 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:28:11,137 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_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f274a5aba9f5a53aba1b5bf0fd0b9cf2990c13e825cbbe6f7043cc6fa5a18df6 [2022-11-03 03:28:11,458 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:28:11,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:28:11,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:28:11,495 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:28:11,496 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:28:11,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-fpi/res1.c [2022-11-03 03:28:11,579 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/data/b4e8a2627/f799c87ddca94081bf4484ace97fb114/FLAG619688ee3 [2022-11-03 03:28:12,168 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:28:12,171 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/sv-benchmarks/c/array-fpi/res1.c [2022-11-03 03:28:12,178 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/data/b4e8a2627/f799c87ddca94081bf4484ace97fb114/FLAG619688ee3 [2022-11-03 03:28:12,498 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/data/b4e8a2627/f799c87ddca94081bf4484ace97fb114 [2022-11-03 03:28:12,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:28:12,502 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:28:12,504 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:28:12,504 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:28:12,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:28:12,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:28:12" (1/1) ... [2022-11-03 03:28:12,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@294f393 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:12, skipping insertion in model container [2022-11-03 03:28:12,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:28:12" (1/1) ... [2022-11-03 03:28:12,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:28:12,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:28:12,716 WARN L230 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_f63e5cea-0e6e-4367-9a95-5fa662b71273/sv-benchmarks/c/array-fpi/res1.c[587,600] [2022-11-03 03:28:12,742 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:28:12,757 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:28:12,780 WARN L230 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_f63e5cea-0e6e-4367-9a95-5fa662b71273/sv-benchmarks/c/array-fpi/res1.c[587,600] [2022-11-03 03:28:12,789 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:28:12,803 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:28:12,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:12 WrapperNode [2022-11-03 03:28:12,803 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:28:12,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:28:12,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:28:12,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:28:12,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:12" (1/1) ... [2022-11-03 03:28:12,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:12" (1/1) ... [2022-11-03 03:28:12,840 INFO L138 Inliner]: procedures = 17, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2022-11-03 03:28:12,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:28:12,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:28:12,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:28:12,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:28:12,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:12" (1/1) ... [2022-11-03 03:28:12,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:12" (1/1) ... [2022-11-03 03:28:12,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:12" (1/1) ... [2022-11-03 03:28:12,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:12" (1/1) ... [2022-11-03 03:28:12,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:12" (1/1) ... [2022-11-03 03:28:12,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:12" (1/1) ... [2022-11-03 03:28:12,866 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:12" (1/1) ... [2022-11-03 03:28:12,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:12" (1/1) ... [2022-11-03 03:28:12,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:28:12,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:28:12,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:28:12,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:28:12,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:12" (1/1) ... [2022-11-03 03:28:12,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:28:12,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:12,914 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:28:12,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:28:12,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:28:12,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:28:12,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:28:12,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 03:28:12,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:28:12,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:28:12,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:28:12,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 03:28:12,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:28:13,043 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:28:13,046 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:28:13,352 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:28:13,409 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:28:13,410 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-03 03:28:13,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:28:13 BoogieIcfgContainer [2022-11-03 03:28:13,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:28:13,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:28:13,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:28:13,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:28:13,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:28:12" (1/3) ... [2022-11-03 03:28:13,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d9b2e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:28:13, skipping insertion in model container [2022-11-03 03:28:13,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:28:12" (2/3) ... [2022-11-03 03:28:13,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d9b2e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:28:13, skipping insertion in model container [2022-11-03 03:28:13,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:28:13" (3/3) ... [2022-11-03 03:28:13,423 INFO L112 eAbstractionObserver]: Analyzing ICFG res1.c [2022-11-03 03:28:13,443 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:28:13,444 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:28:13,536 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:28:13,549 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;@234937d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:28:13,549 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:28:13,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:13,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 03:28:13,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:13,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:13,566 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:13,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:13,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1860276480, now seen corresponding path program 1 times [2022-11-03 03:28:13,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:13,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516459232] [2022-11-03 03:28:13,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:13,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:13,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:13,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516459232] [2022-11-03 03:28:13,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516459232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:13,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:13,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 03:28:13,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349423942] [2022-11-03 03:28:13,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:13,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 03:28:13,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:14,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 03:28:14,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 03:28:14,027 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:14,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:14,108 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2022-11-03 03:28:14,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 03:28:14,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 03:28:14,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:14,124 INFO L225 Difference]: With dead ends: 22 [2022-11-03 03:28:14,124 INFO L226 Difference]: Without dead ends: 10 [2022-11-03 03:28:14,131 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 [2022-11-03 03:28:14,137 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:14,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:14,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-03 03:28:14,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-03 03:28:14,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) 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) [2022-11-03 03:28:14,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2022-11-03 03:28:14,175 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 8 [2022-11-03 03:28:14,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:14,176 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2022-11-03 03:28:14,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:14,177 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2022-11-03 03:28:14,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 03:28:14,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:14,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:14,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:28:14,179 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:14,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:14,180 INFO L85 PathProgramCache]: Analyzing trace with hash 509978442, now seen corresponding path program 1 times [2022-11-03 03:28:14,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:14,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104306591] [2022-11-03 03:28:14,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:14,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 03:28:14,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:14,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104306591] [2022-11-03 03:28:14,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104306591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:28:14,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:28:14,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:28:14,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685489308] [2022-11-03 03:28:14,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:28:14,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:28:14,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:14,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:28:14,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:28:14,371 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-11-03 03:28:14,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:14,413 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2022-11-03 03:28:14,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 03:28:14,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) Word has length 9 [2022-11-03 03:28:14,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:14,415 INFO L225 Difference]: With dead ends: 18 [2022-11-03 03:28:14,415 INFO L226 Difference]: Without dead ends: 13 [2022-11-03 03:28:14,416 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 [2022-11-03 03:28:14,417 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:14,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 4 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:28:14,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-03 03:28:14,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-03 03:28:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 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) [2022-11-03 03:28:14,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-03 03:28:14,424 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2022-11-03 03:28:14,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:14,424 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-03 03:28:14,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-11-03 03:28:14,425 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-03 03:28:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 03:28:14,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:14,426 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:14,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:28:14,427 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:14,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:14,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1718165419, now seen corresponding path program 1 times [2022-11-03 03:28:14,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:14,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611453953] [2022-11-03 03:28:14,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:14,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:15,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:15,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611453953] [2022-11-03 03:28:15,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611453953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:28:15,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158250648] [2022-11-03 03:28:15,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:15,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:15,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:15,922 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:28:15,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 03:28:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:16,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-03 03:28:16,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:16,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:28:16,203 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:28:16,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 treesize of output 19 [2022-11-03 03:28:16,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-11-03 03:28:16,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 03:28:16,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 36 [2022-11-03 03:28:16,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2022-11-03 03:28:17,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2022-11-03 03:28:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:17,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:28:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:17,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158250648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:28:17,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [310230829] [2022-11-03 03:28:17,899 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:28:17,900 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:28:17,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:28:17,909 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:28:17,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:28:17,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:17,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:17,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:18,137 INFO L356 Elim1Store]: treesize reduction 143, result has 26.7 percent of original size [2022-11-03 03:28:18,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 75 [2022-11-03 03:28:18,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:18,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:18,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:18,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:18,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:18,371 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 03:28:18,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 03:28:18,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:18,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:28:18,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:18,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:18,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 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 [2022-11-03 03:28:18,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:18,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:18,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:18,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:18,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:18,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:18,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:18,830 INFO L356 Elim1Store]: treesize reduction 186, result has 18.4 percent of original size [2022-11-03 03:28:18,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 509 treesize of output 504 [2022-11-03 03:28:19,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:28:19,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:28:19,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 68 treesize of output 67 [2022-11-03 03:28:19,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:28:19,262 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:28:19,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 29 [2022-11-03 03:28:19,346 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:28:19,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 54 [2022-11-03 03:28:19,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:19,433 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 03:28:19,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 34 [2022-11-03 03:28:19,514 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:28:19,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 54 [2022-11-03 03:28:19,536 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:28:20,064 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '211#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem15#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem15#1| (* 2 ~N~0)) 1 0)) (= |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_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 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 [2022-11-03 03:28:20,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:28:20,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:28:20,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-11-03 03:28:20,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945414178] [2022-11-03 03:28:20,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:28:20,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 03:28:20,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:20,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 03:28:20,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2022-11-03 03:28:20,068 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:20,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:20,422 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2022-11-03 03:28:20,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:28:20,423 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 03:28:20,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:20,424 INFO L225 Difference]: With dead ends: 19 [2022-11-03 03:28:20,424 INFO L226 Difference]: Without dead ends: 16 [2022-11-03 03:28:20,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 03:28:20,426 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:20,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 26 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 64 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-11-03 03:28:20,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-03 03:28:20,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-11-03 03:28:20,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) [2022-11-03 03:28:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-11-03 03:28:20,432 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 12 [2022-11-03 03:28:20,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:20,432 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-11-03 03:28:20,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:20,432 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-11-03 03:28:20,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 03:28:20,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:20,433 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:20,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:20,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:20,649 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:20,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:20,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1723855813, now seen corresponding path program 2 times [2022-11-03 03:28:20,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:20,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143238557] [2022-11-03 03:28:20,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:20,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:28:20,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:20,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143238557] [2022-11-03 03:28:20,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143238557] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:28:20,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825886649] [2022-11-03 03:28:20,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:28:20,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:20,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:20,760 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:28:20,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 03:28:20,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 03:28:20,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:28:20,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:28:20,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:28:20,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:28:21,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:28:21,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825886649] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:28:21,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [270019517] [2022-11-03 03:28:21,028 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:28:21,028 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:28:21,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:28:21,029 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:28:21,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:28:21,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:21,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:21,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:21,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:21,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:21,252 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 03:28:21,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 03:28:21,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:21,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:21,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:21,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 03:28:21,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:21,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:28:21,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:21,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:21,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 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 [2022-11-03 03:28:21,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:21,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:21,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:21,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:21,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:21,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:21,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:21,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:21,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:21,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:21,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:21,700 INFO L356 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-11-03 03:28:21,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 514 treesize of output 503 [2022-11-03 03:28:21,844 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:28:21,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:28:21,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:28:21,950 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:28:21,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 29 [2022-11-03 03:28:22,040 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:28:22,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 54 [2022-11-03 03:28:22,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:22,129 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:28:22,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 29 [2022-11-03 03:28:22,206 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:28:22,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 54 [2022-11-03 03:28:22,231 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:28:22,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '362#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem15#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem15#1| (* 2 ~N~0)) 1 0)) (= |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_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 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 [2022-11-03 03:28:22,604 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:28:22,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:28:22,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-03 03:28:22,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401793853] [2022-11-03 03:28:22,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:28:22,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 03:28:22,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:22,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 03:28:22,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:28:22,606 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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) [2022-11-03 03:28:22,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:22,722 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-11-03 03:28:22,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 03:28:22,722 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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 [2022-11-03 03:28:22,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:22,723 INFO L225 Difference]: With dead ends: 36 [2022-11-03 03:28:22,723 INFO L226 Difference]: Without dead ends: 20 [2022-11-03 03:28:22,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-11-03 03:28:22,724 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 13 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:22,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 14 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:22,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-03 03:28:22,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2022-11-03 03:28:22,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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) [2022-11-03 03:28:22,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-03 03:28:22,729 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 13 [2022-11-03 03:28:22,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:22,730 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-03 03:28:22,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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) [2022-11-03 03:28:22,733 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-03 03:28:22,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 03:28:22,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:22,735 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:22,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:22,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:22,941 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:22,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:22,941 INFO L85 PathProgramCache]: Analyzing trace with hash -2001762416, now seen corresponding path program 3 times [2022-11-03 03:28:22,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:22,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241394853] [2022-11-03 03:28:22,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:22,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:23,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:28:23,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:23,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241394853] [2022-11-03 03:28:23,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241394853] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:28:23,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489322379] [2022-11-03 03:28:23,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:28:23,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:23,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:23,040 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:28:23,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 03:28:23,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:28:23,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:28:23,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:28:23,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:28:23,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:28:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:28:23,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489322379] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:28:23,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1445208405] [2022-11-03 03:28:23,249 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:28:23,250 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:28:23,251 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:28:23,251 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:28:23,252 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:28:23,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:23,305 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:28:23,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:28:23,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:23,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:23,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:23,475 INFO L356 Elim1Store]: treesize reduction 143, result has 26.7 percent of original size [2022-11-03 03:28:23,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 75 [2022-11-03 03:28:23,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:23,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:23,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:23,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:23,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:23,671 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 03:28:23,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 03:28:23,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:23,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:23,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 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 [2022-11-03 03:28:23,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:23,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:23,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:23,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:23,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:23,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:23,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:24,017 INFO L356 Elim1Store]: treesize reduction 186, result has 18.4 percent of original size [2022-11-03 03:28:24,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 509 treesize of output 504 [2022-11-03 03:28:24,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:28:24,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:28:24,350 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 03:28:24,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 66 treesize of output 71 [2022-11-03 03:28:24,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:28:24,433 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:28:24,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 29 [2022-11-03 03:28:24,502 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:28:24,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 54 [2022-11-03 03:28:24,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:24,580 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 03:28:24,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 34 [2022-11-03 03:28:24,678 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:28:24,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 54 [2022-11-03 03:28:24,707 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:28:25,065 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '553#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem15#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem15#1| (* 2 ~N~0)) 1 0)) (= |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_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 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 [2022-11-03 03:28:25,065 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:28:25,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:28:25,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-03 03:28:25,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608086526] [2022-11-03 03:28:25,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:28:25,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 03:28:25,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:25,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 03:28:25,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-03 03:28:25,067 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:25,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:28:25,191 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-11-03 03:28:25,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 03:28:25,192 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 03:28:25,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:28:25,193 INFO L225 Difference]: With dead ends: 20 [2022-11-03 03:28:25,193 INFO L226 Difference]: Without dead ends: 17 [2022-11-03 03:28:25,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:28:25,194 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:28:25,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 10 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:28:25,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-03 03:28:25,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-03 03:28:25,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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) [2022-11-03 03:28:25,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-03 03:28:25,202 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 15 [2022-11-03 03:28:25,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:28:25,203 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-03 03:28:25,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:28:25,203 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-03 03:28:25,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 03:28:25,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:28:25,204 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:28:25,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:28:25,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:25,431 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:28:25,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:28:25,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1925428128, now seen corresponding path program 4 times [2022-11-03 03:28:25,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:28:25,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923399932] [2022-11-03 03:28:25,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:28:25,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:28:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:27,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:28:27,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923399932] [2022-11-03 03:28:27,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923399932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:28:27,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122900214] [2022-11-03 03:28:27,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:28:27,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:28:27,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:28:27,396 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:28:27,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 03:28:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:28:27,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 03:28:27,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:28:27,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:28:27,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:27,520 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:28:27,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 28 treesize of output 24 [2022-11-03 03:28:27,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-03 03:28:27,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:27,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 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 [2022-11-03 03:28:27,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:27,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:27,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 35 treesize of output 40 [2022-11-03 03:28:27,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:27,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:27,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:27,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 52 [2022-11-03 03:28:28,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:28,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:28,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:28,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 60 [2022-11-03 03:28:28,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:28,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:28,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2022-11-03 03:28:28,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:28,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:28,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:28,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 65 [2022-11-03 03:28:28,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:28,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 75 treesize of output 59 [2022-11-03 03:28:28,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:28,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2022-11-03 03:28:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:28,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:28:53,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:28:53,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122900214] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:28:53,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1496148510] [2022-11-03 03:28:53,504 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:28:53,504 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:28:53,505 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:28:53,505 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:28:53,505 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:28:53,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:53,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:53,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:53,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:53,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:53,696 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 03:28:53,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 03:28:53,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:53,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:28:53,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:53,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:53,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:53,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 03:28:53,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:53,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:53,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 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 [2022-11-03 03:28:53,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:53,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:53,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:53,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:53,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:28:53,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:53,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:54,096 INFO L356 Elim1Store]: treesize reduction 186, result has 18.4 percent of original size [2022-11-03 03:28:54,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 509 treesize of output 504 [2022-11-03 03:28:54,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:28:54,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:28:54,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 68 treesize of output 67 [2022-11-03 03:28:54,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:28:54,356 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:28:54,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 29 [2022-11-03 03:28:54,441 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:28:54,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 54 [2022-11-03 03:28:54,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:28:54,531 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 03:28:54,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 34 [2022-11-03 03:28:54,610 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:28:54,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 54 [2022-11-03 03:28:54,631 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:28:55,591 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '755#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem15#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem15#1| (* 2 ~N~0)) 1 0)) (= |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_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 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 [2022-11-03 03:28:55,591 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:28:55,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:28:55,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-11-03 03:28:55,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776820848] [2022-11-03 03:28:55,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:28:55,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 03:28:55,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:28:55,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 03:28:55,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1667, Unknown=9, NotChecked=0, Total=1892 [2022-11-03 03:28:55,594 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 40 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 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) [2022-11-03 03:29:20,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:20,467 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2022-11-03 03:29:20,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 03:29:20,468 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 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 [2022-11-03 03:29:20,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:20,470 INFO L225 Difference]: With dead ends: 41 [2022-11-03 03:29:20,470 INFO L226 Difference]: Without dead ends: 38 [2022-11-03 03:29:20,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 50.7s TimeCoverageRelationStatistics Valid=391, Invalid=2784, Unknown=17, NotChecked=0, Total=3192 [2022-11-03 03:29:20,473 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:20,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 47 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 139 Invalid, 0 Unknown, 187 Unchecked, 0.3s Time] [2022-11-03 03:29:20,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-03 03:29:20,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-11-03 03:29:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:20,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-11-03 03:29:20,492 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 16 [2022-11-03 03:29:20,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:20,492 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-11-03 03:29:20,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 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) [2022-11-03 03:29:20,493 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-11-03 03:29:20,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 03:29:20,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:20,494 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:20,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:20,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 03:29:20,706 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:20,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:20,707 INFO L85 PathProgramCache]: Analyzing trace with hash 440934800, now seen corresponding path program 5 times [2022-11-03 03:29:20,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:20,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213584886] [2022-11-03 03:29:20,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:20,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:20,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:29:20,874 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:20,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213584886] [2022-11-03 03:29:20,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213584886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:20,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781723744] [2022-11-03 03:29:20,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:29:20,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:20,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:20,879 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:20,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:29:21,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:29:21,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:29:21,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:29:21,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:21,133 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:29:21,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 03:29:21,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781723744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:21,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1567032279] [2022-11-03 03:29:21,230 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:29:21,230 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:21,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:21,231 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:21,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:21,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:21,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:21,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:21,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:21,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:21,477 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 03:29:21,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 03:29:21,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:21,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:21,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:21,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:21,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:21,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 03:29:21,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:21,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:21,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 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 [2022-11-03 03:29:21,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:21,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:21,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:21,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:21,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:21,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:21,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:21,896 INFO L356 Elim1Store]: treesize reduction 186, result has 18.4 percent of original size [2022-11-03 03:29:21,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 509 treesize of output 504 [2022-11-03 03:29:22,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:22,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:22,153 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 03:29:22,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 66 treesize of output 71 [2022-11-03 03:29:22,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:22,229 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:29:22,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 29 [2022-11-03 03:29:22,312 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:29:22,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 54 [2022-11-03 03:29:22,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:22,386 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 03:29:22,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 34 [2022-11-03 03:29:22,490 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:29:22,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 54 [2022-11-03 03:29:22,508 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:22,956 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1025#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem15#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem15#1| (* 2 ~N~0)) 1 0)) (= |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_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 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 [2022-11-03 03:29:22,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:22,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:29:22,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-03 03:29:22,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470531328] [2022-11-03 03:29:22,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:22,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 03:29:22,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:22,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 03:29:22,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:29:22,959 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:23,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:23,186 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2022-11-03 03:29:23,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 03:29:23,186 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-03 03:29:23,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:23,187 INFO L225 Difference]: With dead ends: 59 [2022-11-03 03:29:23,187 INFO L226 Difference]: Without dead ends: 38 [2022-11-03 03:29:23,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:29:23,188 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 21 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:23,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 16 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:23,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-03 03:29:23,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2022-11-03 03:29:23,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 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) [2022-11-03 03:29:23,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-11-03 03:29:23,207 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 17 [2022-11-03 03:29:23,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:23,207 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-11-03 03:29:23,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:23,207 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-11-03 03:29:23,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 03:29:23,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:23,209 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:23,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-03 03:29:23,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:23,414 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:23,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:23,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1185288714, now seen corresponding path program 6 times [2022-11-03 03:29:23,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:23,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944696374] [2022-11-03 03:29:23,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:23,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:29:23,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:23,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944696374] [2022-11-03 03:29:23,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944696374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:23,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979466599] [2022-11-03 03:29:23,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:29:23,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:23,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:23,584 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:23,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 03:29:23,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:29:23,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:29:23,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 03:29:23,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:29:23,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 03:29:23,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979466599] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:29:23,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1171848393] [2022-11-03 03:29:23,842 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:29:23,842 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:29:23,842 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:29:23,843 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:29:23,843 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:29:23,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:23,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:23,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:23,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:23,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:24,058 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 03:29:24,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 03:29:24,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:24,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:24,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:24,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:24,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:24,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 03:29:24,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:24,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:24,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 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 [2022-11-03 03:29:24,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:24,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:24,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:24,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:24,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:24,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:24,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:24,467 INFO L356 Elim1Store]: treesize reduction 186, result has 18.4 percent of original size [2022-11-03 03:29:24,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 509 treesize of output 504 [2022-11-03 03:29:24,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:24,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:24,650 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 03:29:24,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 66 treesize of output 71 [2022-11-03 03:29:24,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:24,733 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:29:24,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 29 [2022-11-03 03:29:24,843 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:29:24,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 54 [2022-11-03 03:29:24,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:24,929 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:29:24,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 29 [2022-11-03 03:29:24,998 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:29:24,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 54 [2022-11-03 03:29:25,022 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:29:25,460 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1312#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem15#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem15#1| (* 2 ~N~0)) 1 0)) (= |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_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 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 [2022-11-03 03:29:25,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:29:25,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:29:25,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-03 03:29:25,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457608721] [2022-11-03 03:29:25,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:29:25,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 03:29:25,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:29:25,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 03:29:25,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-03 03:29:25,463 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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) [2022-11-03 03:29:25,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:29:25,655 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-11-03 03:29:25,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 03:29:25,656 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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) Word has length 18 [2022-11-03 03:29:25,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:29:25,657 INFO L225 Difference]: With dead ends: 35 [2022-11-03 03:29:25,657 INFO L226 Difference]: Without dead ends: 26 [2022-11-03 03:29:25,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-11-03 03:29:25,658 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:29:25,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 10 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:29:25,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-03 03:29:25,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-11-03 03:29:25,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:29:25,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-03 03:29:25,669 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 18 [2022-11-03 03:29:25,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:29:25,670 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-03 03:29:25,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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) [2022-11-03 03:29:25,671 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-03 03:29:25,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 03:29:25,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:29:25,671 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:29:25,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:29:25,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:25,879 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:29:25,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:29:25,879 INFO L85 PathProgramCache]: Analyzing trace with hash 35953013, now seen corresponding path program 7 times [2022-11-03 03:29:25,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:29:25,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762448911] [2022-11-03 03:29:25,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:29:25,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:29:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:28,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:29:28,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762448911] [2022-11-03 03:29:28,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762448911] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:29:28,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072480519] [2022-11-03 03:29:28,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:29:28,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:29:28,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:29:28,953 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:29:28,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 03:29:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:29:29,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 03:29:29,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:29:29,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:29:29,093 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:29:29,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 treesize of output 19 [2022-11-03 03:29:29,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-11-03 03:29:29,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-03 03:29:29,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 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 [2022-11-03 03:29:29,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 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 [2022-11-03 03:29:29,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 53 treesize of output 64 [2022-11-03 03:29:29,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:29,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 76 [2022-11-03 03:29:30,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:30,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:30,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:30,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:30,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:30,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 89 [2022-11-03 03:29:30,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:30,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:30,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:30,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:30,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 84 [2022-11-03 03:29:30,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:30,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:30,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 82 [2022-11-03 03:29:30,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:30,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:30,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 83 [2022-11-03 03:29:31,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:31,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:31,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:31,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:29:31,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:29:31,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 87 [2022-11-03 03:29:31,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 81 [2022-11-03 03:29:31,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2022-11-03 03:29:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:29:31,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:29:43,511 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_456 Int) (v_ArrVal_454 Int) (v_ArrVal_451 Int) (v_ArrVal_449 Int) (v_ArrVal_448 Int) (v_ArrVal_459 Int) (v_ArrVal_458 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ .cse2 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_448) (+ .cse2 4 |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_449))))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_458 (+ v_ArrVal_456 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_456)) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|)))) (not (<= v_ArrVal_459 (+ v_ArrVal_458 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_458)) |c_ULTIMATE.start_main_~b~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~b~0#1.offset|))))) (not (<= v_ArrVal_456 (+ v_ArrVal_454 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_454)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (< (+ v_ArrVal_459 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_459)) |c_ULTIMATE.start_main_~b~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ (* c_~N~0 2) 1)) (not (<= v_ArrVal_451 (+ (select .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset|) (select (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (not (<= v_ArrVal_454 (+ v_ArrVal_451 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_451)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (not (<= v_ArrVal_448 1)) (not (<= v_ArrVal_449 1)))))) is different from false [2022-11-03 03:31:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 3 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-03 03:31:16,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072480519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:31:16,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1878470976] [2022-11-03 03:31:16,044 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:31:16,044 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:31:16,045 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:31:16,045 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:31:16,045 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:31:16,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:16,089 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:31:16,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:16,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:16,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:16,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:16,279 INFO L356 Elim1Store]: treesize reduction 143, result has 26.7 percent of original size [2022-11-03 03:31:16,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 75 [2022-11-03 03:31:16,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:16,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:16,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:16,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:16,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:16,468 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 03:31:16,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 03:31:16,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:16,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:16,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 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 [2022-11-03 03:31:16,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:16,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:16,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:16,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:16,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:31:16,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:16,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:16,758 INFO L356 Elim1Store]: treesize reduction 186, result has 18.4 percent of original size [2022-11-03 03:31:16,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 509 treesize of output 504 [2022-11-03 03:31:16,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:16,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:16,987 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-11-03 03:31:16,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 66 treesize of output 71 [2022-11-03 03:31:17,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:31:17,069 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:31:17,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 29 [2022-11-03 03:31:17,152 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:31:17,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 54 [2022-11-03 03:31:17,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:31:17,225 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:31:17,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 29 [2022-11-03 03:31:17,305 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:31:17,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 54 [2022-11-03 03:31:17,325 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:31:19,064 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1589#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem15#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem15#1| (* 2 ~N~0)) 1 0)) (= |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_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 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 [2022-11-03 03:31:19,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:31:19,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:31:19,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 51 [2022-11-03 03:31:19,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881427453] [2022-11-03 03:31:19,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:31:19,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-03 03:31:19,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:31:19,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-03 03:31:19,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=2558, Unknown=32, NotChecked=104, Total=2970 [2022-11-03 03:31:19,067 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:32:53,677 WARN L234 SmtUtils]: Spent 6.89s on a formula simplification that was a NOOP. DAG size: 169 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 03:33:44,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:44,571 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2022-11-03 03:33:44,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-03 03:33:44,572 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-03 03:33:44,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:44,573 INFO L225 Difference]: With dead ends: 54 [2022-11-03 03:33:44,573 INFO L226 Difference]: Without dead ends: 51 [2022-11-03 03:33:44,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 250.8s TimeCoverageRelationStatistics Valid=467, Invalid=4155, Unknown=74, NotChecked=134, Total=4830 [2022-11-03 03:33:44,575 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:44,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 51 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 266 Unchecked, 0.2s Time] [2022-11-03 03:33:44,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-03 03:33:44,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2022-11-03 03:33:44,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 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) [2022-11-03 03:33:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2022-11-03 03:33:44,596 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 20 [2022-11-03 03:33:44,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:44,596 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2022-11-03 03:33:44,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:44,597 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2022-11-03 03:33:44,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 03:33:44,597 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:44,597 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:44,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:44,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:44,798 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:44,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:44,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1114208027, now seen corresponding path program 8 times [2022-11-03 03:33:44,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:44,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763677738] [2022-11-03 03:33:44,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:44,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:33:44,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:44,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763677738] [2022-11-03 03:33:44,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763677738] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:44,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968601318] [2022-11-03 03:33:44,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:33:44,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:44,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:44,951 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:44,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:33:45,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:33:45,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:33:45,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:33:45,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:33:45,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:33:45,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968601318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:33:45,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2037188437] [2022-11-03 03:33:45,293 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:33:45,293 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:33:45,293 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:33:45,293 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:33:45,294 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:33:45,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,340 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:33:45,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:45,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,509 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 03:33:45,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 03:33:45,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 03:33:45,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 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 [2022-11-03 03:33:45,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:45,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:45,831 INFO L356 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-11-03 03:33:45,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 514 treesize of output 503 [2022-11-03 03:33:45,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:45,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:46,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:46,042 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:33:46,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 29 [2022-11-03 03:33:46,114 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:33:46,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 54 [2022-11-03 03:33:46,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:46,182 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:33:46,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 29 [2022-11-03 03:33:46,251 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:33:46,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 54 [2022-11-03 03:33:46,268 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:33:46,619 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1933#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem15#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem15#1| (* 2 ~N~0)) 1 0)) (= |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_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 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 [2022-11-03 03:33:46,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:33:46,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:33:46,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-03 03:33:46,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611564688] [2022-11-03 03:33:46,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:33:46,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 03:33:46,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:46,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 03:33:46,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:33:46,621 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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) [2022-11-03 03:33:46,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:46,838 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2022-11-03 03:33:46,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:33:46,838 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 21 [2022-11-03 03:33:46,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:46,840 INFO L225 Difference]: With dead ends: 77 [2022-11-03 03:33:46,840 INFO L226 Difference]: Without dead ends: 45 [2022-11-03 03:33:46,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2022-11-03 03:33:46,841 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:46,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 12 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:33:46,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-03 03:33:46,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-11-03 03:33:46,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 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) [2022-11-03 03:33:46,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-11-03 03:33:46,858 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 21 [2022-11-03 03:33:46,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:46,859 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-11-03 03:33:46,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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) [2022-11-03 03:33:46,859 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-11-03 03:33:46,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 03:33:46,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:46,860 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:46,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:47,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 03:33:47,061 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:47,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:47,061 INFO L85 PathProgramCache]: Analyzing trace with hash -724827489, now seen corresponding path program 9 times [2022-11-03 03:33:47,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:47,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769898662] [2022-11-03 03:33:47,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:47,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:47,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:33:47,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:47,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769898662] [2022-11-03 03:33:47,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769898662] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:47,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327586522] [2022-11-03 03:33:47,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:33:47,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:47,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:47,228 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:47,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 03:33:47,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:33:47,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:33:47,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:33:47,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:33:47,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:33:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:33:47,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327586522] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:33:47,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1173325209] [2022-11-03 03:33:47,502 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:33:47,502 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:33:47,502 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:33:47,503 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:33:47,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:33:47,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,705 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 03:33:47,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 03:33:47,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 03:33:47,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:47,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 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 [2022-11-03 03:33:47,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:47,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:47,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:48,024 INFO L356 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-11-03 03:33:48,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 514 treesize of output 503 [2022-11-03 03:33:48,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:48,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:48,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:48,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:48,248 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 03:33:48,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 34 [2022-11-03 03:33:48,325 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:33:48,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 54 [2022-11-03 03:33:48,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:48,386 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 03:33:48,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 29 [2022-11-03 03:33:48,445 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 03:33:48,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 54 [2022-11-03 03:33:48,467 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 03:33:48,808 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2299#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem15#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem15#1| (* 2 ~N~0)) 1 0)) (= |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_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 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 [2022-11-03 03:33:48,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 03:33:48,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 03:33:48,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-03 03:33:48,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868466005] [2022-11-03 03:33:48,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 03:33:48,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 03:33:48,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:33:48,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 03:33:48,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-11-03 03:33:48,810 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:48,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:33:48,995 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2022-11-03 03:33:48,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 03:33:48,996 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-03 03:33:48,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:33:48,996 INFO L225 Difference]: With dead ends: 42 [2022-11-03 03:33:48,997 INFO L226 Difference]: Without dead ends: 31 [2022-11-03 03:33:48,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-11-03 03:33:48,998 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:33:48,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 10 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:33:48,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-03 03:33:49,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2022-11-03 03:33:49,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:49,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-03 03:33:49,010 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 22 [2022-11-03 03:33:49,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:33:49,011 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-03 03:33:49,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:33:49,011 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-03 03:33:49,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 03:33:49,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:33:49,012 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:33:49,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:33:49,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:49,213 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:33:49,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:33:49,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1623039552, now seen corresponding path program 10 times [2022-11-03 03:33:49,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:33:49,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998562066] [2022-11-03 03:33:49,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:33:49,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:33:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:53,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:33:53,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998562066] [2022-11-03 03:33:53,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998562066] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 03:33:53,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758618360] [2022-11-03 03:33:53,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 03:33:53,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:33:53,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:33:53,165 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:33:53,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 03:33:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:33:53,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 103 conjunts are in the unsatisfiable core [2022-11-03 03:33:53,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:33:53,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:33:53,329 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 03:33:53,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 treesize of output 19 [2022-11-03 03:33:53,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-11-03 03:33:53,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:53,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-03 03:33:53,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:53,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:53,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 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 [2022-11-03 03:33:53,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:53,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:53,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:53,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 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 [2022-11-03 03:33:53,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:53,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:53,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:53,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 64 [2022-11-03 03:33:53,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:53,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:53,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:53,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:53,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 62 treesize of output 76 [2022-11-03 03:33:54,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 88 [2022-11-03 03:33:54,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 100 [2022-11-03 03:33:54,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:54,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 113 [2022-11-03 03:33:54,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:54,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 108 [2022-11-03 03:33:55,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:55,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 113 [2022-11-03 03:33:55,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 105 [2022-11-03 03:33:55,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:55,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 111 [2022-11-03 03:33:55,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 107 [2022-11-03 03:33:55,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:33:55,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:33:55,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 111 [2022-11-03 03:33:56,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 9 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 103 [2022-11-03 03:33:57,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 9 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 39 [2022-11-03 03:33:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:33:58,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:43,966 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-11-03 03:34:43,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-11-03 03:34:43,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/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") [2022-11-03 03:34:43,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1072962506] [2022-11-03 03:34:43,969 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 03:34:43,969 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 03:34:43,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 03:34:43,969 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 03:34:43,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 03:34:43,972 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/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:274) 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:336) 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 [2022-11-03 03:34:43,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 03:34:43,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-11-03 03:34:43,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467354526] [2022-11-03 03:34:43,976 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 03:34:43,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 03:34:43,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:43,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 03:34:43,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=2492, Unknown=3, NotChecked=0, Total=2756 [2022-11-03 03:34:43,978 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 23 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:43,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 03:34:43,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=261, Invalid=2492, Unknown=3, NotChecked=0, Total=2756 [2022-11-03 03:34:43,980 INFO L413 NwaCegarLoop]: 0 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, 0 SdHoareTripleChecker+Invalid, 1 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 [2022-11-03 03:34:43,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:34:44,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-03 03:34:44,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:34:44,191 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@3ced9d22 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:460) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:104) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) 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) [2022-11-03 03:34:44,193 INFO L158 Benchmark]: Toolchain (without parser) took 391690.59ms. Allocated memory was 130.0MB in the beginning and 297.8MB in the end (delta: 167.8MB). Free memory was 93.6MB in the beginning and 201.3MB in the end (delta: -107.7MB). Peak memory consumption was 61.1MB. Max. memory is 16.1GB. [2022-11-03 03:34:44,193 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 130.0MB. Free memory is still 109.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:34:44,193 INFO L158 Benchmark]: CACSL2BoogieTranslator took 299.57ms. Allocated memory is still 130.0MB. Free memory was 93.4MB in the beginning and 104.2MB in the end (delta: -10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 03:34:44,193 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.56ms. Allocated memory is still 130.0MB. Free memory was 103.7MB in the beginning and 102.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 03:34:44,193 INFO L158 Benchmark]: Boogie Preprocessor took 28.75ms. Allocated memory is still 130.0MB. Free memory was 102.1MB in the beginning and 101.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 03:34:44,194 INFO L158 Benchmark]: RCFGBuilder took 542.74ms. Allocated memory is still 130.0MB. Free memory was 101.1MB in the beginning and 85.4MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 03:34:44,194 INFO L158 Benchmark]: TraceAbstraction took 390776.68ms. Allocated memory was 130.0MB in the beginning and 297.8MB in the end (delta: 167.8MB). Free memory was 84.9MB in the beginning and 201.3MB in the end (delta: -116.4MB). Peak memory consumption was 53.4MB. Max. memory is 16.1GB. [2022-11-03 03:34:44,195 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 130.0MB. Free memory is still 109.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 299.57ms. Allocated memory is still 130.0MB. Free memory was 93.4MB in the beginning and 104.2MB in the end (delta: -10.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.56ms. Allocated memory is still 130.0MB. Free memory was 103.7MB in the beginning and 102.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 28.75ms. Allocated memory is still 130.0MB. Free memory was 102.1MB in the beginning and 101.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 542.74ms. Allocated memory is still 130.0MB. Free memory was 101.1MB in the beginning and 85.4MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 390776.68ms. Allocated memory was 130.0MB in the beginning and 297.8MB in the end (delta: 167.8MB). Free memory was 84.9MB in the beginning and 201.3MB in the end (delta: -116.4MB). Peak memory consumption was 53.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@3ced9d22 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@3ced9d22: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/res1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI --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 f274a5aba9f5a53aba1b5bf0fd0b9cf2990c13e825cbbe6f7043cc6fa5a18df6 --- 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-5e519f3 [2022-11-03 03:34:46,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:34:46,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:34:46,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:34:46,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:34:46,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:34:46,268 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:34:46,272 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:34:46,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:34:46,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:34:46,286 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:34:46,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:34:46,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:34:46,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:34:46,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:34:46,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:34:46,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:34:46,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:34:46,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:34:46,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:34:46,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:34:46,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:34:46,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:34:46,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:34:46,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:34:46,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:34:46,335 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:34:46,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:34:46,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:34:46,337 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:34:46,337 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:34:46,338 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:34:46,339 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:34:46,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:34:46,340 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:34:46,341 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:34:46,341 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:34:46,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:34:46,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:34:46,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:34:46,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:34:46,344 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 03:34:46,366 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:34:46,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:34:46,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:34:46,368 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:34:46,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:34:46,369 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:34:46,369 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:34:46,369 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:34:46,369 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:34:46,370 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:34:46,370 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:34:46,370 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:34:46,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:34:46,371 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:34:46,372 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:34:46,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:34:46,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:34:46,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:34:46,373 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:34:46,373 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 03:34:46,373 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 03:34:46,374 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 03:34:46,374 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:34:46,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:34:46,374 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:34:46,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:34:46,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:34:46,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 03:34:46,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:34:46,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:34:46,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:34:46,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:34:46,377 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:34:46,377 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 03:34:46,377 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 03:34:46,378 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:34:46,378 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:34:46,378 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 03:34:46,378 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f274a5aba9f5a53aba1b5bf0fd0b9cf2990c13e825cbbe6f7043cc6fa5a18df6 [2022-11-03 03:34:46,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:34:46,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:34:46,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:34:46,715 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:34:46,715 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:34:46,717 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-fpi/res1.c [2022-11-03 03:34:46,773 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/data/dda168db9/fe6e7eaa858f4744a20434d76d988511/FLAG7f7c46c61 [2022-11-03 03:34:47,300 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:34:47,301 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/sv-benchmarks/c/array-fpi/res1.c [2022-11-03 03:34:47,309 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/data/dda168db9/fe6e7eaa858f4744a20434d76d988511/FLAG7f7c46c61 [2022-11-03 03:34:47,695 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/data/dda168db9/fe6e7eaa858f4744a20434d76d988511 [2022-11-03 03:34:47,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:34:47,700 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:34:47,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:34:47,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:34:47,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:34:47,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:34:47" (1/1) ... [2022-11-03 03:34:47,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bb1c8fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:34:47, skipping insertion in model container [2022-11-03 03:34:47,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:34:47" (1/1) ... [2022-11-03 03:34:47,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:34:47,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:34:47,884 WARN L230 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_f63e5cea-0e6e-4367-9a95-5fa662b71273/sv-benchmarks/c/array-fpi/res1.c[587,600] [2022-11-03 03:34:47,905 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:34:47,916 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:34:47,966 WARN L230 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_f63e5cea-0e6e-4367-9a95-5fa662b71273/sv-benchmarks/c/array-fpi/res1.c[587,600] [2022-11-03 03:34:47,982 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:34:48,003 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:34:48,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:34:48 WrapperNode [2022-11-03 03:34:48,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:34:48,005 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:34:48,005 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:34:48,005 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:34:48,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:34:48" (1/1) ... [2022-11-03 03:34:48,031 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:34:48" (1/1) ... [2022-11-03 03:34:48,050 INFO L138 Inliner]: procedures = 21, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 94 [2022-11-03 03:34:48,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:34:48,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:34:48,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:34:48,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:34:48,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:34:48" (1/1) ... [2022-11-03 03:34:48,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:34:48" (1/1) ... [2022-11-03 03:34:48,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:34:48" (1/1) ... [2022-11-03 03:34:48,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:34:48" (1/1) ... [2022-11-03 03:34:48,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:34:48" (1/1) ... [2022-11-03 03:34:48,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:34:48" (1/1) ... [2022-11-03 03:34:48,076 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:34:48" (1/1) ... [2022-11-03 03:34:48,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:34:48" (1/1) ... [2022-11-03 03:34:48,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:34:48,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:34:48,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:34:48,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:34:48,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:34:48" (1/1) ... [2022-11-03 03:34:48,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:34:48,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:48,112 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:34:48,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:34:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:34:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 03:34:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 03:34:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-11-03 03:34:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 03:34:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 03:34:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:34:48,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:34:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-11-03 03:34:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 03:34:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 03:34:48,235 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:34:48,237 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:34:48,449 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:34:48,454 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:34:48,455 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-03 03:34:48,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:34:48 BoogieIcfgContainer [2022-11-03 03:34:48,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:34:48,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:34:48,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:34:48,463 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:34:48,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:34:47" (1/3) ... [2022-11-03 03:34:48,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21039870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:34:48, skipping insertion in model container [2022-11-03 03:34:48,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:34:48" (2/3) ... [2022-11-03 03:34:48,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21039870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:34:48, skipping insertion in model container [2022-11-03 03:34:48,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:34:48" (3/3) ... [2022-11-03 03:34:48,466 INFO L112 eAbstractionObserver]: Analyzing ICFG res1.c [2022-11-03 03:34:48,486 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:34:48,486 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:34:48,547 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:34:48,558 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;@26a7888f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:34:48,558 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:34:48,562 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 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) [2022-11-03 03:34:48,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 03:34:48,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:48,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:48,579 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:48,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:48,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1202110748, now seen corresponding path program 1 times [2022-11-03 03:34:48,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:34:48,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943568539] [2022-11-03 03:34:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:48,596 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:34:48,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:34:48,601 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:34:48,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 03:34:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:48,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 03:34:48,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:48,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:34:48,801 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:34:48,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943568539] [2022-11-03 03:34:48,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943568539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:48,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:48,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:34:48,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942997995] [2022-11-03 03:34:48,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:48,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 03:34:48,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:34:48,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 03:34:48,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:34:48,848 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 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) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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) [2022-11-03 03:34:48,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:48,869 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2022-11-03 03:34:48,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 03:34:48,871 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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 15 [2022-11-03 03:34:48,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:48,879 INFO L225 Difference]: With dead ends: 44 [2022-11-03 03:34:48,879 INFO L226 Difference]: Without dead ends: 20 [2022-11-03 03:34:48,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:34:48,889 INFO L413 NwaCegarLoop]: 28 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, 28 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 [2022-11-03 03:34:48,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 03:34:48,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-03 03:34:48,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-03 03:34:48,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 03:34:48,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-03 03:34:48,939 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2022-11-03 03:34:48,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:48,940 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-03 03:34:48,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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) [2022-11-03 03:34:48,941 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-03 03:34:48,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 03:34:48,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:48,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:48,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:49,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:34:49,155 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:49,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:49,156 INFO L85 PathProgramCache]: Analyzing trace with hash -944124056, now seen corresponding path program 1 times [2022-11-03 03:34:49,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:34:49,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350140089] [2022-11-03 03:34:49,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:49,157 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:34:49,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:34:49,160 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:34:49,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 03:34:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:49,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 03:34:49,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:49,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:49,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 03:34:49,507 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:34:49,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350140089] [2022-11-03 03:34:49,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350140089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:49,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:49,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 03:34:49,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867390976] [2022-11-03 03:34:49,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:49,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 03:34:49,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:34:49,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 03:34:49,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:34:49,517 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-11-03 03:34:49,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:49,775 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-11-03 03:34:49,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:34:49,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 15 [2022-11-03 03:34:49,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:49,778 INFO L225 Difference]: With dead ends: 41 [2022-11-03 03:34:49,778 INFO L226 Difference]: Without dead ends: 28 [2022-11-03 03:34:49,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:34:49,780 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 51 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:49,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 10 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:34:49,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-03 03:34:49,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-11-03 03:34:49,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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) [2022-11-03 03:34:49,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-11-03 03:34:49,791 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2022-11-03 03:34:49,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:49,791 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-11-03 03:34:49,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-11-03 03:34:49,792 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-11-03 03:34:49,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 03:34:49,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:49,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:49,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 03:34:50,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:34:50,006 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:50,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:50,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1401448688, now seen corresponding path program 1 times [2022-11-03 03:34:50,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:34:50,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457789266] [2022-11-03 03:34:50,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:50,008 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:34:50,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:34:50,009 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:34:50,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 03:34:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:50,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 03:34:50,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:50,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:50,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:50,435 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-03 03:34:50,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 51 treesize of output 45 [2022-11-03 03:34:50,650 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:50,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-03 03:34:51,170 INFO L356 Elim1Store]: treesize reduction 36, result has 49.3 percent of original size [2022-11-03 03:34:51,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 37 treesize of output 60 [2022-11-03 03:34:51,946 INFO L356 Elim1Store]: treesize reduction 89, result has 16.0 percent of original size [2022-11-03 03:34:51,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4 case distinctions, treesize of input 87 treesize of output 64 [2022-11-03 03:34:52,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:52,532 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:52,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 107 treesize of output 67 [2022-11-03 03:34:52,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:52,924 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:34:52,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 75 [2022-11-03 03:34:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:52,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:34:58,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:58,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:58,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:58,634 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:34:58,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457789266] [2022-11-03 03:34:58,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457789266] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:34:58,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1150710726] [2022-11-03 03:34:58,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:58,635 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:34:58,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:34:58,646 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:34:58,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-03 03:34:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:58,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-03 03:34:58,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:34:59,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:59,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:59,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:34:59,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 37 [2022-11-03 03:34:59,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:34:59,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:34:59,489 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:34:59,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 34 treesize of output 40 [2022-11-03 03:35:00,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:00,869 INFO L356 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-03 03:35:00,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4 case distinctions, treesize of input 35 treesize of output 44 [2022-11-03 03:35:01,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:01,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:01,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:01,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 87 treesize of output 55 [2022-11-03 03:35:02,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:02,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:02,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:02,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 99 treesize of output 67 [2022-11-03 03:35:03,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:03,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:03,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 107 treesize of output 75 [2022-11-03 03:35:03,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:35:03,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:08,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:08,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:08,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:08,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:08,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:35:08,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1150710726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:08,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177433116] [2022-11-03 03:35:08,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:08,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:08,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:08,872 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:08,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 03:35:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:35:08,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 03:35:08,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:09,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:09,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:09,037 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-03 03:35:09,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 treesize of output 19 [2022-11-03 03:35:09,324 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:09,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 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 [2022-11-03 03:35:10,303 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:10,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 42 [2022-11-03 03:35:10,962 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:10,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 89 treesize of output 57 [2022-11-03 03:35:11,780 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:11,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 111 treesize of output 71 [2022-11-03 03:35:12,284 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:12,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 83 [2022-11-03 03:35:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:35:12,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:12,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:12,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:12,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:35:13,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177433116] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:13,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:35:13,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14, 14, 15, 15] total 50 [2022-11-03 03:35:13,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749484755] [2022-11-03 03:35:13,414 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:35:13,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-03 03:35:13,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:35:13,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-03 03:35:13,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=1958, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 03:35:13,419 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 50 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 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) [2022-11-03 03:35:21,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:21,679 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-11-03 03:35:21,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 03:35:21,680 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 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 [2022-11-03 03:35:21,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:21,682 INFO L225 Difference]: With dead ends: 58 [2022-11-03 03:35:21,682 INFO L226 Difference]: Without dead ends: 52 [2022-11-03 03:35:21,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=593, Invalid=2599, Unknown=0, NotChecked=0, Total=3192 [2022-11-03 03:35:21,684 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:21,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 118 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 124 Invalid, 0 Unknown, 94 Unchecked, 2.3s Time] [2022-11-03 03:35:21,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-03 03:35:21,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2022-11-03 03:35:21,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 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) [2022-11-03 03:35:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-11-03 03:35:21,697 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 23 [2022-11-03 03:35:21,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:21,698 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-11-03 03:35:21,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 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) [2022-11-03 03:35:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-11-03 03:35:21,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 03:35:21,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:21,699 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:21,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2022-11-03 03:35:21,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:22,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:22,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:35:22,311 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:22,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:22,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1774307726, now seen corresponding path program 2 times [2022-11-03 03:35:22,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:35:22,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975171776] [2022-11-03 03:35:22,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:35:22,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:35:22,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:35:22,313 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:35:22,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 03:35:22,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:35:22,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:35:22,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 03:35:22,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:22,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:35:22,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:35:22,772 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:35:22,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975171776] [2022-11-03 03:35:22,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975171776] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:22,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1531368043] [2022-11-03 03:35:22,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:35:22,773 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:35:22,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:35:22,775 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:35:22,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-03 03:35:22,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:35:22,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:35:22,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 03:35:22,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:35:23,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:35:23,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1531368043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:23,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908529704] [2022-11-03 03:35:23,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 03:35:23,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:23,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:23,493 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:23,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 03:35:23,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 03:35:23,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:35:23,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:35:23,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:35:23,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 03:35:23,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908529704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:23,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:35:23,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9, 9, 8, 7] total 24 [2022-11-03 03:35:23,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869214171] [2022-11-03 03:35:23,825 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:35:23,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 03:35:23,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:35:23,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 03:35:23,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-11-03 03:35:23,827 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 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) [2022-11-03 03:35:24,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:24,729 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2022-11-03 03:35:24,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:35:24,732 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 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) Word has length 25 [2022-11-03 03:35:24,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:24,733 INFO L225 Difference]: With dead ends: 88 [2022-11-03 03:35:24,733 INFO L226 Difference]: Without dead ends: 53 [2022-11-03 03:35:24,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2022-11-03 03:35:24,735 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 186 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:24,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 25 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:35:24,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-03 03:35:24,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2022-11-03 03:35:24,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 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) [2022-11-03 03:35:24,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-11-03 03:35:24,746 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 25 [2022-11-03 03:35:24,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:24,746 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-11-03 03:35:24,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 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) [2022-11-03 03:35:24,747 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-11-03 03:35:24,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 03:35:24,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:24,748 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:24,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:24,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:25,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:25,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 03:35:25,351 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:25,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:25,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1964080588, now seen corresponding path program 3 times [2022-11-03 03:35:25,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:35:25,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735198703] [2022-11-03 03:35:25,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:35:25,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:35:25,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:35:25,353 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:35:25,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 03:35:25,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:35:25,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:35:25,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 03:35:25,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:35:25,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:35:26,076 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:35:26,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735198703] [2022-11-03 03:35:26,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735198703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:26,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [666291330] [2022-11-03 03:35:26,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:35:26,077 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:35:26,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:35:26,079 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:35:26,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-03 03:35:26,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:35:26,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:35:26,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 03:35:26,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:35:26,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:35:26,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [666291330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:26,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19913129] [2022-11-03 03:35:26,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 03:35:26,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:26,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:35:26,615 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:35:26,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 03:35:26,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 03:35:26,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:35:26,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 03:35:26,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:35:27,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:35:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 03:35:27,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19913129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:35:27,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:35:27,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9, 7, 8, 7] total 27 [2022-11-03 03:35:27,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62989032] [2022-11-03 03:35:27,058 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:35:27,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 03:35:27,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:35:27,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 03:35:27,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2022-11-03 03:35:27,059 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 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) [2022-11-03 03:35:28,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:28,110 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2022-11-03 03:35:28,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 03:35:28,115 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-03 03:35:28,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:28,116 INFO L225 Difference]: With dead ends: 90 [2022-11-03 03:35:28,116 INFO L226 Difference]: Without dead ends: 66 [2022-11-03 03:35:28,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=410, Invalid=1072, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 03:35:28,117 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 273 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:28,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 23 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 03:35:28,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-03 03:35:28,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2022-11-03 03:35:28,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 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) [2022-11-03 03:35:28,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2022-11-03 03:35:28,139 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 27 [2022-11-03 03:35:28,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:28,139 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2022-11-03 03:35:28,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 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) [2022-11-03 03:35:28,140 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2022-11-03 03:35:28,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 03:35:28,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:28,141 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:28,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:28,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:28,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 03:35:28,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:35:28,754 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:28,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:28,755 INFO L85 PathProgramCache]: Analyzing trace with hash 666081912, now seen corresponding path program 4 times [2022-11-03 03:35:28,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 03:35:28,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791016384] [2022-11-03 03:35:28,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:35:28,755 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 03:35:28,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 03:35:28,756 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 03:35:28,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 03:35:28,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:35:28,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:35:28,943 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 03:35:28,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:35:29,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:29,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:35:29,050 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-03 03:35:29,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 treesize of output 19 [2022-11-03 03:35:29,261 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:29,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 32 treesize of output 34 [2022-11-03 03:35:29,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:29,547 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:29,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 42 [2022-11-03 03:35:30,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:30,163 INFO L356 Elim1Store]: treesize reduction 44, result has 49.4 percent of original size [2022-11-03 03:35:30,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 48 treesize of output 82 [2022-11-03 03:35:30,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:30,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:30,874 INFO L356 Elim1Store]: treesize reduction 70, result has 27.8 percent of original size [2022-11-03 03:35:30,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 53 treesize of output 74 [2022-11-03 03:35:31,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:31,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:31,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:31,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:31,832 INFO L356 Elim1Store]: treesize reduction 187, result has 13.0 percent of original size [2022-11-03 03:35:31,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 113 treesize of output 94 [2022-11-03 03:35:32,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:32,522 INFO L356 Elim1Store]: treesize reduction 188, result has 12.6 percent of original size [2022-11-03 03:35:32,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 115 treesize of output 99 [2022-11-03 03:35:33,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:35:33,304 INFO L356 Elim1Store]: treesize reduction 234, result has 8.2 percent of original size [2022-11-03 03:35:33,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 155 treesize of output 117 [2022-11-03 03:35:33,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:33,834 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:33,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 159 [2022-11-03 03:35:34,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:35:34,341 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 03:35:34,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 279 treesize of output 225 [2022-11-03 03:35:34,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:35:34,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:38:41,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:41,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:41,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 11 refuted. 5 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:38:48,328 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 03:38:48,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791016384] [2022-11-03 03:38:48,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791016384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:38:48,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [330646564] [2022-11-03 03:38:48,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:38:48,329 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 03:38:48,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 03:38:48,336 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 03:38:48,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-03 03:38:48,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:38:48,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:38:48,553 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 03:38:48,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:38:51,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:51,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:51,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 03:38:51,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 24 [2022-11-03 03:38:52,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:52,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:52,303 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 03:38:52,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 34 treesize of output 40 [2022-11-03 03:38:54,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:54,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:54,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:54,116 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:38:54,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4 case distinctions, treesize of input 44 treesize of output 49 [2022-11-03 03:38:57,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:57,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:57,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:57,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:57,142 INFO L356 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-03 03:38:57,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 48 treesize of output 60 [2022-11-03 03:38:58,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:58,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:58,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:58,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:58,601 INFO L356 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-11-03 03:38:58,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 53 treesize of output 64 [2022-11-03 03:38:59,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:59,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:59,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:59,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:38:59,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:59,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:38:59,943 INFO L356 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2022-11-03 03:38:59,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 113 treesize of output 83 [2022-11-03 03:39:01,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:01,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:01,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:01,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:01,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 89 [2022-11-03 03:39:04,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:04,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:04,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:39:04,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:04,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:04,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 117 [2022-11-03 03:39:06,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:06,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:06,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:06,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 159 [2022-11-03 03:39:08,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:08,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:39:08,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 273 treesize of output 225 [2022-11-03 03:39:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:39:09,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:42:08,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:08,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:08,151 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-11-03 03:42:08,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:08,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [330646564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:42:08,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273604444] [2022-11-03 03:42:08,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 03:42:08,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 03:42:08,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:42:08,158 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 03:42:08,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f63e5cea-0e6e-4367-9a95-5fa662b71273/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 03:42:08,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 03:42:08,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 03:42:08,263 WARN L261 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-03 03:42:08,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 03:42:08,310 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-03 03:42:08,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 treesize of output 19 [2022-11-03 03:42:08,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:08,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:08,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2022-11-03 03:42:09,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:09,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2022-11-03 03:42:10,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:10,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:10,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:10,650 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 03:42:10,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 case distinctions, treesize of input 44 treesize of output 49 [2022-11-03 03:42:13,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:13,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:13,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:13,255 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 03:42:13,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4 case distinctions, treesize of input 48 treesize of output 56 [2022-11-03 03:42:14,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:14,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:14,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:14,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:14,486 INFO L356 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-11-03 03:42:14,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 53 treesize of output 64 [2022-11-03 03:42:15,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:15,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:15,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:15,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:15,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:15,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:15,973 INFO L356 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2022-11-03 03:42:15,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 113 treesize of output 83 [2022-11-03 03:42:17,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:17,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:17,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:17,826 INFO L356 Elim1Store]: treesize reduction 122, result has 20.3 percent of original size [2022-11-03 03:42:17,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 123 treesize of output 89 [2022-11-03 03:42:20,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 03:42:20,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:20,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:20,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:20,770 INFO L356 Elim1Store]: treesize reduction 126, result has 21.7 percent of original size [2022-11-03 03:42:20,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 147 treesize of output 117 [2022-11-03 03:42:23,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:23,201 INFO L356 Elim1Store]: treesize reduction 120, result has 19.5 percent of original size [2022-11-03 03:42:23,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 193 treesize of output 159 [2022-11-03 03:42:25,175 INFO L356 Elim1Store]: treesize reduction 24, result has 27.3 percent of original size [2022-11-03 03:42:25,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 265 treesize of output 233 [2022-11-03 03:42:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:25,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 03:42:32,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:32,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:32,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 03:42:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:42:32,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273604444] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 03:42:32,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 03:42:32,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 22, 21, 23, 21] total 82 [2022-11-03 03:42:32,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684571096] [2022-11-03 03:42:32,326 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 03:42:32,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-03 03:42:32,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 03:42:32,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-03 03:42:32,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=5641, Unknown=78, NotChecked=0, Total=6642 [2022-11-03 03:42:32,329 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 82 states, 82 states have (on average 1.451219512195122) internal successors, (119), 82 states have internal predecessors, (119), 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)