./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/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_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/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_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/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 cb0d07e46dc94102f1a204dcfe0d8cca3d45653b0db7cea07d03c16ba8563271 --- 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 01:38:15,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:38:16,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:38:16,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:38:16,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:38:16,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:38:16,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:38:16,058 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:38:16,061 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:38:16,062 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:38:16,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:38:16,065 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:38:16,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:38:16,070 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:38:16,071 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:38:16,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:38:16,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:38:16,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:38:16,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:38:16,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:38:16,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:38:16,092 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:38:16,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:38:16,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:38:16,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:38:16,107 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:38:16,108 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:38:16,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:38:16,110 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:38:16,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:38:16,110 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:38:16,111 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:38:16,112 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:38:16,113 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:38:16,114 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:38:16,114 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:38:16,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:38:16,115 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:38:16,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:38:16,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:38:16,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:38:16,119 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:38:16,158 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:38:16,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:38:16,159 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:38:16,159 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:38:16,160 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:38:16,160 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:38:16,160 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:38:16,160 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:38:16,161 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:38:16,161 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:38:16,162 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:38:16,162 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:38:16,162 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:38:16,163 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:38:16,163 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:38:16,163 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:38:16,163 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:38:16,163 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:38:16,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:38:16,164 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:38:16,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:38:16,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:38:16,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:38:16,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:38:16,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:38:16,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:38:16,166 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:38:16,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:38:16,167 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:38:16,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:38:16,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:38:16,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:38:16,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:38:16,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:38:16,168 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:38:16,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:38:16,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:38:16,169 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:38:16,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:38:16,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:38:16,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:38:16,170 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_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb0d07e46dc94102f1a204dcfe0d8cca3d45653b0db7cea07d03c16ba8563271 [2022-11-03 01:38:16,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:38:16,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:38:16,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:38:16,520 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:38:16,521 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:38:16,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-multidimensional/diff-2-n-u.c [2022-11-03 01:38:16,599 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/data/290d8df7e/6b969395e87f4f259c59b458e1ba5dd7/FLAG3d5a6ed58 [2022-11-03 01:38:17,119 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:38:17,119 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c [2022-11-03 01:38:17,128 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/data/290d8df7e/6b969395e87f4f259c59b458e1ba5dd7/FLAG3d5a6ed58 [2022-11-03 01:38:17,489 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/data/290d8df7e/6b969395e87f4f259c59b458e1ba5dd7 [2022-11-03 01:38:17,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:38:17,493 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:38:17,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:38:17,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:38:17,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:38:17,500 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:38:17" (1/1) ... [2022-11-03 01:38:17,507 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d03a79e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:17, skipping insertion in model container [2022-11-03 01:38:17,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:38:17" (1/1) ... [2022-11-03 01:38:17,518 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:38:17,536 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:38:17,717 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_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c[322,335] [2022-11-03 01:38:17,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:38:17,772 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:38:17,787 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_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/sv-benchmarks/c/array-multidimensional/diff-2-n-u.c[322,335] [2022-11-03 01:38:17,810 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:38:17,826 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:38:17,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:17 WrapperNode [2022-11-03 01:38:17,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:38:17,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:38:17,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:38:17,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:38:17,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:17" (1/1) ... [2022-11-03 01:38:17,852 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:17" (1/1) ... [2022-11-03 01:38:17,885 INFO L138 Inliner]: procedures = 14, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 109 [2022-11-03 01:38:17,886 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:38:17,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:38:17,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:38:17,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:38:17,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:17" (1/1) ... [2022-11-03 01:38:17,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:17" (1/1) ... [2022-11-03 01:38:17,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:17" (1/1) ... [2022-11-03 01:38:17,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:17" (1/1) ... [2022-11-03 01:38:17,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:17" (1/1) ... [2022-11-03 01:38:17,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:17" (1/1) ... [2022-11-03 01:38:17,930 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:17" (1/1) ... [2022-11-03 01:38:17,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:17" (1/1) ... [2022-11-03 01:38:17,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:38:17,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:38:17,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:38:17,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:38:17,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:17" (1/1) ... [2022-11-03 01:38:17,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:38:17,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:38:17,980 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:38:18,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:38:18,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:38:18,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:38:18,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:38:18,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:38:18,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:38:18,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:38:18,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:38:18,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:38:18,111 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:38:18,113 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:38:18,334 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:38:18,398 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:38:18,398 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-03 01:38:18,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:38:18 BoogieIcfgContainer [2022-11-03 01:38:18,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:38:18,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:38:18,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:38:18,430 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:38:18,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:38:17" (1/3) ... [2022-11-03 01:38:18,431 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e928899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:38:18, skipping insertion in model container [2022-11-03 01:38:18,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:38:17" (2/3) ... [2022-11-03 01:38:18,432 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e928899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:38:18, skipping insertion in model container [2022-11-03 01:38:18,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:38:18" (3/3) ... [2022-11-03 01:38:18,433 INFO L112 eAbstractionObserver]: Analyzing ICFG diff-2-n-u.c [2022-11-03 01:38:18,458 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:38:18,458 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:38:18,506 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:38:18,513 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;@5fbb86ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:38:18,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:38:18,518 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:18,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 01:38:18,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:18,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:18,526 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:18,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:18,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1309612569, now seen corresponding path program 1 times [2022-11-03 01:38:18,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:38:18,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797409160] [2022-11-03 01:38:18,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:18,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:38:18,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:38:18,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158078121] [2022-11-03 01:38:18,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:18,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:38:18,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:38:18,633 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:38:18,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:38:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:18,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:38:18,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:18,829 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 01:38:18,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:38:18,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:38:18,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797409160] [2022-11-03 01:38:18,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:38:18,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158078121] [2022-11-03 01:38:18,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158078121] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:38:18,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:38:18,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:38:18,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084744358] [2022-11-03 01:38:18,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:38:18,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:38:18,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:38:18,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:38:18,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:38:18,874 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 01:38:18,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:18,950 INFO L93 Difference]: Finished difference Result 27 states and 43 transitions. [2022-11-03 01:38:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:38:18,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 01:38:18,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:18,961 INFO L225 Difference]: With dead ends: 27 [2022-11-03 01:38:18,961 INFO L226 Difference]: Without dead ends: 15 [2022-11-03 01:38:18,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 01:38:18,968 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:38:18,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 14 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:38:18,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-03 01:38:18,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-11-03 01:38:18,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:19,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2022-11-03 01:38:19,001 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 21 transitions. Word has length 8 [2022-11-03 01:38:19,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:19,002 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 21 transitions. [2022-11-03 01:38:19,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 01:38:19,002 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 21 transitions. [2022-11-03 01:38:19,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 01:38:19,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:19,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:19,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:19,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-03 01:38:19,208 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:19,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:19,209 INFO L85 PathProgramCache]: Analyzing trace with hash -215038707, now seen corresponding path program 1 times [2022-11-03 01:38:19,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:38:19,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022936152] [2022-11-03 01:38:19,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:19,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:38:19,227 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:38:19,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240220923] [2022-11-03 01:38:19,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:19,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:38:19,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:38:19,239 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:38:19,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:38:19,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:19,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:38:19,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:19,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:38:19,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:38:19,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:38:19,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022936152] [2022-11-03 01:38:19,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:38:19,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240220923] [2022-11-03 01:38:19,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240220923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:38:19,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:38:19,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:38:19,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031984002] [2022-11-03 01:38:19,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:38:19,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:38:19,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:38:19,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:38:19,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:38:19,389 INFO L87 Difference]: Start difference. First operand 14 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:19,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:19,468 INFO L93 Difference]: Finished difference Result 37 states and 57 transitions. [2022-11-03 01:38:19,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:38:19,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-03 01:38:19,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:19,470 INFO L225 Difference]: With dead ends: 37 [2022-11-03 01:38:19,470 INFO L226 Difference]: Without dead ends: 25 [2022-11-03 01:38:19,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 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 01:38:19,472 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:38:19,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 10 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:38:19,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-03 01:38:19,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2022-11-03 01:38:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 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 01:38:19,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2022-11-03 01:38:19,479 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 10 [2022-11-03 01:38:19,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:19,479 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2022-11-03 01:38:19,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:19,480 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2022-11-03 01:38:19,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:38:19,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:19,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:19,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:19,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:38:19,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:19,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:19,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1517764035, now seen corresponding path program 1 times [2022-11-03 01:38:19,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:38:19,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302797240] [2022-11-03 01:38:19,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:19,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:38:19,731 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:38:19,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833916100] [2022-11-03 01:38:19,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:19,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:38:19,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:38:19,743 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:38:19,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:38:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:19,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:38:19,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:38:19,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:38:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:38:19,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:38:19,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302797240] [2022-11-03 01:38:19,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:38:19,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833916100] [2022-11-03 01:38:19,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833916100] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:38:19,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1136428661] [2022-11-03 01:38:19,955 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-03 01:38:19,955 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:38:19,959 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:38:19,964 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:38:19,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:38:20,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:20,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:20,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:20,215 INFO L356 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2022-11-03 01:38:20,216 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 40 treesize of output 72 [2022-11-03 01:38:20,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:20,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:20,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:20,427 INFO L356 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-03 01:38:20,427 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 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-03 01:38:20,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:20,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:20,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2022-11-03 01:38:21,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:21,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:21,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:21,533 INFO L356 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-03 01:38:21,534 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 423 treesize of output 398 [2022-11-03 01:38:21,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:21,880 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:21,880 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:21,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:21,995 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:21,996 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:22,110 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:38:22,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1136428661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:38:22,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:38:22,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 9 [2022-11-03 01:38:22,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127002918] [2022-11-03 01:38:22,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:38:22,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:38:22,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:38:22,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:38:22,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:38:22,300 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:22,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:22,438 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-11-03 01:38:22,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:38:22,439 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 01:38:22,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:22,440 INFO L225 Difference]: With dead ends: 39 [2022-11-03 01:38:22,440 INFO L226 Difference]: Without dead ends: 29 [2022-11-03 01:38:22,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-11-03 01:38:22,442 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:38:22,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 6 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:38:22,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-03 01:38:22,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2022-11-03 01:38:22,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 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 01:38:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2022-11-03 01:38:22,454 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 11 [2022-11-03 01:38:22,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:22,454 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2022-11-03 01:38:22,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:22,455 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2022-11-03 01:38:22,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 01:38:22,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:22,456 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:22,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:22,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:38:22,669 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:22,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:22,670 INFO L85 PathProgramCache]: Analyzing trace with hash 862012475, now seen corresponding path program 1 times [2022-11-03 01:38:22,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:38:22,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653598066] [2022-11-03 01:38:22,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:22,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:38:22,684 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:38:22,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379977516] [2022-11-03 01:38:22,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:22,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:38:22,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:38:22,686 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:38:22,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:38:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:38:22,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:38:22,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:38:22,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:38:22,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 01:38:22,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:38:22,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653598066] [2022-11-03 01:38:22,833 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:38:22,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379977516] [2022-11-03 01:38:22,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379977516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:38:22,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [550991589] [2022-11-03 01:38:22,848 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-03 01:38:22,848 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:38:22,849 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:38:22,849 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:38:22,849 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:38:22,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:22,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:22,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:23,027 INFO L356 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-03 01:38:23,028 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 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-03 01:38:23,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:23,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:23,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:23,061 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 40 treesize of output 52 [2022-11-03 01:38:23,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:23,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:23,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2022-11-03 01:38:23,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:23,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:23,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:23,575 INFO L356 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-03 01:38:23,576 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 423 treesize of output 398 [2022-11-03 01:38:23,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:23,791 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:23,791 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:23,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:23,865 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:23,866 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:23,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:23,981 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 01:38:23,982 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-03 01:38:24,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,032 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:24,033 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:24,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,081 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:24,082 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:24,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,160 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 01:38:24,161 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-03 01:38:24,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,199 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:24,200 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:24,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,248 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 01:38:24,249 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-03 01:38:24,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,316 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:24,317 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:24,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,362 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:24,362 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:24,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,439 INFO L356 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-03 01:38:24,440 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 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-03 01:38:24,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,595 INFO L356 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-03 01:38:24,596 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 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-03 01:38:24,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,774 INFO L356 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-03 01:38:24,778 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 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-03 01:38:24,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:24,909 INFO L356 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-03 01:38:24,910 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 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-03 01:38:25,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:25,060 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:25,061 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:25,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:25,108 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:25,109 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:25,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:25,176 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:25,177 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:25,182 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:38:25,874 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '515#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_#t~mem12#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem10#1| (* 4294967295 |ULTIMATE.start_main_#t~mem11#1|)) 4294967296)) 1 0)) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-03 01:38:25,874 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:38:25,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:38:25,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-03 01:38:25,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544473055] [2022-11-03 01:38:25,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:38:25,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:38:25,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:38:25,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:38:25,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-11-03 01:38:25,877 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:26,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:26,026 INFO L93 Difference]: Finished difference Result 63 states and 89 transitions. [2022-11-03 01:38:26,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:38:26,027 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-03 01:38:26,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:26,028 INFO L225 Difference]: With dead ends: 63 [2022-11-03 01:38:26,028 INFO L226 Difference]: Without dead ends: 45 [2022-11-03 01:38:26,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:38:26,029 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 40 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:38:26,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 16 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:38:26,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-03 01:38:26,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-11-03 01:38:26,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:26,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2022-11-03 01:38:26,054 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 17 [2022-11-03 01:38:26,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:26,055 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2022-11-03 01:38:26,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:38:26,055 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2022-11-03 01:38:26,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 01:38:26,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:26,056 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:26,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:26,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:38:26,272 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:26,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:26,273 INFO L85 PathProgramCache]: Analyzing trace with hash 883853987, now seen corresponding path program 2 times [2022-11-03 01:38:26,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:38:26,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959235895] [2022-11-03 01:38:26,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:26,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:38:26,289 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:38:26,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843354375] [2022-11-03 01:38:26,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:38:26,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:38:26,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:38:26,291 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:38:26,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:38:26,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:38:26,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:38:26,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:38:26,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:38:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:38:26,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:38:26,493 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:38:26,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:38:26,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959235895] [2022-11-03 01:38:26,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 01:38:26,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843354375] [2022-11-03 01:38:26,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843354375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:38:26,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1569197902] [2022-11-03 01:38:26,498 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-03 01:38:26,498 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:38:26,499 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:38:26,499 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:38:26,499 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:38:26,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:26,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:26,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:26,662 INFO L356 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-03 01:38:26,662 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 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-03 01:38:26,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:26,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:26,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:26,693 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 40 treesize of output 52 [2022-11-03 01:38:26,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:26,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:26,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 12 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2022-11-03 01:38:27,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:27,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:38:27,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:27,135 INFO L356 Elim1Store]: treesize reduction 125, result has 16.7 percent of original size [2022-11-03 01:38:27,136 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 423 treesize of output 398 [2022-11-03 01:38:27,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:27,312 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:27,313 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:27,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:27,393 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:27,394 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:27,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:27,484 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 01:38:27,485 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-03 01:38:27,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:27,527 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:27,528 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:27,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:27,571 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:27,572 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:27,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:27,652 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:27,655 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:27,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:27,701 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:27,701 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:27,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:27,741 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:27,741 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:27,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:27,781 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:27,781 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:27,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:27,826 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:27,827 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:27,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:27,877 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:27,878 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:27,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:27,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:27,962 INFO L356 Elim1Store]: treesize reduction 40, result has 51.8 percent of original size [2022-11-03 01:38:27,963 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 3 case distinctions, treesize of input 41 treesize of output 58 [2022-11-03 01:38:28,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:28,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:28,104 INFO L356 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-03 01:38:28,104 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 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-03 01:38:28,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:28,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:28,237 INFO L356 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-03 01:38:28,237 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 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-03 01:38:28,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:28,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:28,364 INFO L356 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-03 01:38:28,365 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 3 case distinctions, treesize of input 53 treesize of output 70 [2022-11-03 01:38:28,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:28,498 INFO L356 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-03 01:38:28,498 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 1 case distinctions, treesize of input 45 treesize of output 31 [2022-11-03 01:38:28,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:28,540 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:28,540 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:28,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:38:28,584 INFO L356 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-03 01:38:28,585 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 1 case distinctions, treesize of input 57 treesize of output 39 [2022-11-03 01:38:28,589 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:38:29,275 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '861#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem10#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_#t~mem12#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem10#1| (* 4294967295 |ULTIMATE.start_main_#t~mem11#1|)) 4294967296)) 1 0)) (<= 0 |ULTIMATE.start_main_~#B~0#1.base|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_main_~#B~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#C~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2022-11-03 01:38:29,275 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:38:29,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:38:29,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-03 01:38:29,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384549712] [2022-11-03 01:38:29,276 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:38:29,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:38:29,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:38:29,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:38:29,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-11-03 01:38:29,277 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 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 01:38:29,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:38:29,506 INFO L93 Difference]: Finished difference Result 171 states and 219 transitions. [2022-11-03 01:38:29,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 01:38:29,507 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 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 26 [2022-11-03 01:38:29,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:38:29,515 INFO L225 Difference]: With dead ends: 171 [2022-11-03 01:38:29,516 INFO L226 Difference]: Without dead ends: 141 [2022-11-03 01:38:29,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 15 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:38:29,520 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 94 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:38:29,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 16 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:38:29,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-03 01:38:29,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 92. [2022-11-03 01:38:29,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2197802197802199) internal successors, (111), 91 states have internal predecessors, (111), 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 01:38:29,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2022-11-03 01:38:29,566 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 26 [2022-11-03 01:38:29,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:38:29,566 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2022-11-03 01:38:29,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 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 01:38:29,567 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2022-11-03 01:38:29,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 01:38:29,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:38:29,571 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:38:29,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:38:29,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:38:29,795 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:38:29,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:38:29,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1008971561, now seen corresponding path program 3 times [2022-11-03 01:38:29,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:38:29,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914046604] [2022-11-03 01:38:29,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:38:29,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:38:29,838 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 01:38:29,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58299316] [2022-11-03 01:38:29,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:38:29,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:38:29,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:38:29,839 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:38:29,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fbe6d2d-4634-44ba-9fb4-8ff887f0b56f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process