./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7 --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 ae698f02be6e3657db0e7ca3e62c4cfb121d43a876624ed4d21d19b033e0c02e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:06:52,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:06:52,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:06:52,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:06:52,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:06:52,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:06:52,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:06:52,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:06:52,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:06:52,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:06:52,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:06:52,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:06:52,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:06:52,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:06:52,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:06:52,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:06:52,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:06:52,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:06:52,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:06:52,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:06:52,137 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:06:52,138 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:06:52,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:06:52,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:06:52,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:06:52,151 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:06:52,152 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:06:52,154 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:06:52,154 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:06:52,156 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:06:52,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:06:52,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:06:52,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:06:52,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:06:52,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:06:52,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:06:52,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:06:52,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:06:52,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:06:52,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:06:52,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:06:52,166 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:06:52,209 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:06:52,209 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:06:52,210 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:06:52,210 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:06:52,211 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:06:52,217 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:06:52,218 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:06:52,218 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:06:52,218 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:06:52,218 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:06:52,219 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:06:52,220 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:06:52,220 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:06:52,220 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:06:52,220 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:06:52,220 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:06:52,220 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:06:52,221 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:06:52,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:06:52,222 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:06:52,222 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:06:52,222 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:06:52,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:06:52,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:06:52,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:06:52,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:06:52,223 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:06:52,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:06:52,223 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:06:52,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:06:52,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:06:52,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:06:52,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:06:52,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:06:52,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:06:52,225 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:06:52,225 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:06:52,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:06:52,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:06:52,225 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:06:52,226 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:06:52,226 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ae698f02be6e3657db0e7ca3e62c4cfb121d43a876624ed4d21d19b033e0c02e [2021-11-25 19:06:52,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:06:52,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:06:52,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:06:52,522 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:06:52,523 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:06:52,524 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c [2021-11-25 19:06:52,597 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/data/716c16daa/1fa120b6299c4bd6981bd1db4d659a5b/FLAG79396b3d1 [2021-11-25 19:06:53,108 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:06:53,112 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c [2021-11-25 19:06:53,120 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/data/716c16daa/1fa120b6299c4bd6981bd1db4d659a5b/FLAG79396b3d1 [2021-11-25 19:06:53,456 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/data/716c16daa/1fa120b6299c4bd6981bd1db4d659a5b [2021-11-25 19:06:53,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:06:53,459 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:06:53,474 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:06:53,474 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:06:53,477 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:06:53,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:06:53" (1/1) ... [2021-11-25 19:06:53,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30b5030b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:53, skipping insertion in model container [2021-11-25 19:06:53,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:06:53" (1/1) ... [2021-11-25 19:06:53,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:06:53,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:06:53,693 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_91e163ca-680d-47c3-9f81-064578e486cb/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c[322,335] [2021-11-25 19:06:53,716 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:06:53,723 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:06:53,732 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_91e163ca-680d-47c3-9f81-064578e486cb/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c[322,335] [2021-11-25 19:06:53,746 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:06:53,758 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:06:53,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:53 WrapperNode [2021-11-25 19:06:53,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:06:53,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:06:53,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:06:53,760 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:06:53,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:53" (1/1) ... [2021-11-25 19:06:53,774 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:53" (1/1) ... [2021-11-25 19:06:53,802 INFO L137 Inliner]: procedures = 14, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 118 [2021-11-25 19:06:53,804 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:06:53,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:06:53,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:06:53,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:06:53,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:53" (1/1) ... [2021-11-25 19:06:53,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:53" (1/1) ... [2021-11-25 19:06:53,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:53" (1/1) ... [2021-11-25 19:06:53,816 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:53" (1/1) ... [2021-11-25 19:06:53,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:53" (1/1) ... [2021-11-25 19:06:53,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:53" (1/1) ... [2021-11-25 19:06:53,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:53" (1/1) ... [2021-11-25 19:06:53,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:06:53,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:06:53,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:06:53,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:06:53,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:53" (1/1) ... [2021-11-25 19:06:53,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:06:53,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:06:53,885 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:06:53,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:06:53,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:06:53,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:06:53,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:06:53,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:06:53,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:06:53,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:06:53,930 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:06:53,930 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:06:53,992 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:06:53,994 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:06:54,180 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:06:54,217 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:06:54,217 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-11-25 19:06:54,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:06:54 BoogieIcfgContainer [2021-11-25 19:06:54,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:06:54,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:06:54,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:06:54,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:06:54,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:06:53" (1/3) ... [2021-11-25 19:06:54,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2a135d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:06:54, skipping insertion in model container [2021-11-25 19:06:54,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:53" (2/3) ... [2021-11-25 19:06:54,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2a135d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:06:54, skipping insertion in model container [2021-11-25 19:06:54,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:06:54" (3/3) ... [2021-11-25 19:06:54,228 INFO L111 eAbstractionObserver]: Analyzing ICFG diff-3-n-u.c [2021-11-25 19:06:54,233 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:06:54,234 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:06:54,281 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:06:54,288 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:06:54,288 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:06:54,303 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:06:54,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 19:06:54,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:06:54,308 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:06:54,309 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:06:54,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:06:54,314 INFO L85 PathProgramCache]: Analyzing trace with hash 2125816706, now seen corresponding path program 1 times [2021-11-25 19:06:54,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:06:54,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189874616] [2021-11-25 19:06:54,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:54,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:06:54,432 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:06:54,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180488835] [2021-11-25 19:06:54,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:54,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:54,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:06:54,435 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:06:54,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:06:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:54,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:06:54,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:06:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:06:54,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:06:54,623 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:06:54,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189874616] [2021-11-25 19:06:54,624 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:06:54,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180488835] [2021-11-25 19:06:54,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180488835] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:06:54,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:06:54,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:06:54,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568856758] [2021-11-25 19:06:54,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:06:54,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:06:54,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:06:54,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:06:54,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:06:54,672 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-11-25 19:06:54,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:06:54,753 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2021-11-25 19:06:54,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:06:54,759 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 [2021-11-25 19:06:54,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:06:54,766 INFO L225 Difference]: With dead ends: 29 [2021-11-25 19:06:54,766 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 19:06:54,771 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:06:54,784 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 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 [2021-11-25 19:06:54,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:06:54,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 19:06:54,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-11-25 19:06:54,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:06:54,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 23 transitions. [2021-11-25 19:06:54,825 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 23 transitions. Word has length 8 [2021-11-25 19:06:54,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:06:54,826 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 23 transitions. [2021-11-25 19:06:54,826 INFO L471 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) [2021-11-25 19:06:54,826 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 23 transitions. [2021-11-25 19:06:54,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:06:54,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:06:54,827 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:06:54,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:06:55,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:55,033 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:06:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:06:55,034 INFO L85 PathProgramCache]: Analyzing trace with hash -952978249, now seen corresponding path program 1 times [2021-11-25 19:06:55,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:06:55,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695510947] [2021-11-25 19:06:55,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:55,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:06:55,044 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:06:55,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745543011] [2021-11-25 19:06:55,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:55,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:55,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:06:55,055 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:06:55,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:06:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:55,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:06:55,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:06:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:06:55,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:06:55,230 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:06:55,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695510947] [2021-11-25 19:06:55,230 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:06:55,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745543011] [2021-11-25 19:06:55,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745543011] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:06:55,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:06:55,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:06:55,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646623444] [2021-11-25 19:06:55,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:06:55,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:06:55,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:06:55,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:06:55,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:06:55,237 INFO L87 Difference]: Start difference. First operand 15 states and 23 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) [2021-11-25 19:06:55,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:06:55,318 INFO L93 Difference]: Finished difference Result 40 states and 63 transitions. [2021-11-25 19:06:55,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:06:55,318 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 [2021-11-25 19:06:55,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:06:55,319 INFO L225 Difference]: With dead ends: 40 [2021-11-25 19:06:55,319 INFO L226 Difference]: Without dead ends: 27 [2021-11-25 19:06:55,320 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:06:55,321 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:06:55,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 11 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:06:55,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-25 19:06:55,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2021-11-25 19:06:55,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:06:55,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2021-11-25 19:06:55,329 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 10 [2021-11-25 19:06:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:06:55,329 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2021-11-25 19:06:55,329 INFO L471 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) [2021-11-25 19:06:55,329 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2021-11-25 19:06:55,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 19:06:55,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:06:55,330 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:06:55,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:06:55,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:55,549 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:06:55,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:06:55,550 INFO L85 PathProgramCache]: Analyzing trace with hash 821330551, now seen corresponding path program 1 times [2021-11-25 19:06:55,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:06:55,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748817205] [2021-11-25 19:06:55,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:55,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:06:55,559 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:06:55,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175012780] [2021-11-25 19:06:55,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:55,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:55,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:06:55,561 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:06:55,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:06:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:55,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:06:55,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:06:55,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:06:55,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:06:55,702 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:06:55,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748817205] [2021-11-25 19:06:55,703 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:06:55,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175012780] [2021-11-25 19:06:55,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175012780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:06:55,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:06:55,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:06:55,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809875443] [2021-11-25 19:06:55,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:06:55,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:06:55,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:06:55,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:06:55,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:06:55,707 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:06:55,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:06:55,773 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2021-11-25 19:06:55,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:06:55,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-25 19:06:55,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:06:55,775 INFO L225 Difference]: With dead ends: 43 [2021-11-25 19:06:55,775 INFO L226 Difference]: Without dead ends: 27 [2021-11-25 19:06:55,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:06:55,777 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:06:55,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 12 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:06:55,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-25 19:06:55,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2021-11-25 19:06:55,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 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) [2021-11-25 19:06:55,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2021-11-25 19:06:55,785 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 12 [2021-11-25 19:06:55,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:06:55,785 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2021-11-25 19:06:55,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:06:55,786 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2021-11-25 19:06:55,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 19:06:55,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:06:55,787 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:06:55,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:06:56,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:56,004 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:06:56,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:06:56,005 INFO L85 PathProgramCache]: Analyzing trace with hash 66772088, now seen corresponding path program 1 times [2021-11-25 19:06:56,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:06:56,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137517137] [2021-11-25 19:06:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:56,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:06:56,014 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:06:56,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861952665] [2021-11-25 19:06:56,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:56,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:56,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:06:56,016 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:06:56,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:06:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:56,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:06:56,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:06:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:06:56,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:06:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:06:56,178 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:06:56,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137517137] [2021-11-25 19:06:56,178 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:06:56,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861952665] [2021-11-25 19:06:56,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861952665] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:06:56,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1598490447] [2021-11-25 19:06:56,215 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 19:06:56,215 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:06:56,220 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:06:56,225 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:06:56,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:06:56,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:56,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:56,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:56,427 INFO L354 Elim1Store]: treesize reduction 178, result has 22.3 percent of original size [2021-11-25 19:06:56,427 INFO L388 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 46 treesize of output 76 [2021-11-25 19:06:56,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:56,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:56,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:56,626 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-25 19:06:56,627 INFO L388 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 [2021-11-25 19:06:56,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:56,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:56,809 INFO L388 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 81 treesize of output 61 [2021-11-25 19:06:57,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:57,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:57,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:57,109 INFO L354 Elim1Store]: treesize reduction 172, result has 15.7 percent of original size [2021-11-25 19:06:57,110 INFO L388 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 472 treesize of output 440 [2021-11-25 19:06:57,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:57,262 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-25 19:06:57,262 INFO L388 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 78 treesize of output 53 [2021-11-25 19:06:57,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:57,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:57,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:57,639 INFO L354 Elim1Store]: treesize reduction 168, result has 17.6 percent of original size [2021-11-25 19:06:57,640 INFO L388 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 299 treesize of output 279 [2021-11-25 19:06:57,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:57,757 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-25 19:06:57,757 INFO L388 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 78 treesize of output 53 [2021-11-25 19:06:58,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:58,047 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-25 19:06:58,047 INFO L388 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 78 treesize of output 53 [2021-11-25 19:06:58,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:58,117 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-25 19:06:58,117 INFO L388 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 78 treesize of output 53 [2021-11-25 19:06:58,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:58,310 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-25 19:06:58,311 INFO L388 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 66 treesize of output 45 [2021-11-25 19:06:58,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:58,383 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-25 19:06:58,384 INFO L388 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 78 treesize of output 53 [2021-11-25 19:06:58,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:58,633 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-25 19:06:58,634 INFO L388 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 66 treesize of output 45 [2021-11-25 19:06:58,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:06:58,700 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-25 19:06:58,700 INFO L388 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 78 treesize of output 53 [2021-11-25 19:06:58,709 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:06:59,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1598490447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:06:59,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:06:59,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 10 [2021-11-25 19:06:59,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779576615] [2021-11-25 19:06:59,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:06:59,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:06:59,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:06:59,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:06:59,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:06:59,066 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:06:59,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:06:59,172 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2021-11-25 19:06:59,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:06:59,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 19:06:59,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:06:59,173 INFO L225 Difference]: With dead ends: 42 [2021-11-25 19:06:59,174 INFO L226 Difference]: Without dead ends: 33 [2021-11-25 19:06:59,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:06:59,175 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:06:59,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 6 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:06:59,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-25 19:06:59,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2021-11-25 19:06:59,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 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) [2021-11-25 19:06:59,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2021-11-25 19:06:59,185 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2021-11-25 19:06:59,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:06:59,185 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2021-11-25 19:06:59,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:06:59,186 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2021-11-25 19:06:59,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 19:06:59,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:06:59,187 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:06:59,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:06:59,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:59,387 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:06:59,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:06:59,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1959799413, now seen corresponding path program 1 times [2021-11-25 19:06:59,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:06:59,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538957043] [2021-11-25 19:06:59,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:59,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:06:59,396 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:06:59,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013817458] [2021-11-25 19:06:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:59,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:59,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:06:59,404 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:06:59,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:06:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:59,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:06:59,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:06:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:06:59,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:06:59,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:06:59,561 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:06:59,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538957043] [2021-11-25 19:06:59,561 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:06:59,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013817458] [2021-11-25 19:06:59,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013817458] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:06:59,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [15056178] [2021-11-25 19:06:59,566 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 19:06:59,566 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:06:59,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:06:59,566 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:06:59,567 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:06:59,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,723 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-25 19:06:59,723 INFO L388 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 [2021-11-25 19:06:59,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,753 INFO L388 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 46 treesize of output 58 [2021-11-25 19:06:59,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:06:59,839 INFO L388 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 93 treesize of output 69 [2021-11-25 19:07:00,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:00,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:00,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:00,056 INFO L354 Elim1Store]: treesize reduction 172, result has 15.7 percent of original size [2021-11-25 19:07:00,056 INFO L388 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 470 treesize of output 438 [2021-11-25 19:07:00,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:00,159 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-25 19:07:00,160 INFO L388 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 78 treesize of output 53 [2021-11-25 19:07:00,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:00,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:00,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:00,456 INFO L354 Elim1Store]: treesize reduction 144, result has 18.2 percent of original size [2021-11-25 19:07:00,457 INFO L388 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 287 treesize of output 271 [2021-11-25 19:07:00,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:00,539 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-25 19:07:00,540 INFO L388 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 78 treesize of output 53 [2021-11-25 19:07:00,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:00,780 INFO L354 Elim1Store]: treesize reduction 26, result has 48.0 percent of original size [2021-11-25 19:07:00,781 INFO L388 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 66 treesize of output 45 [2021-11-25 19:07:00,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:00,831 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-25 19:07:00,832 INFO L388 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 78 treesize of output 53 [2021-11-25 19:07:01,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:01,032 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-25 19:07:01,032 INFO L388 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 78 treesize of output 53 [2021-11-25 19:07:01,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:01,071 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-25 19:07:01,071 INFO L388 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 78 treesize of output 53 [2021-11-25 19:07:01,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:01,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:01,222 INFO L354 Elim1Store]: treesize reduction 54, result has 51.4 percent of original size [2021-11-25 19:07:01,223 INFO L388 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 60 treesize of output 79 [2021-11-25 19:07:01,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:01,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:01,566 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-25 19:07:01,567 INFO L388 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 72 treesize of output 91 [2021-11-25 19:07:01,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:01,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:01,871 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-25 19:07:01,871 INFO L388 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 72 treesize of output 91 [2021-11-25 19:07:02,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:02,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:02,113 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-25 19:07:02,113 INFO L388 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 72 treesize of output 91 [2021-11-25 19:07:02,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:02,430 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-25 19:07:02,430 INFO L388 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 78 treesize of output 53 [2021-11-25 19:07:02,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:02,473 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-25 19:07:02,474 INFO L388 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 78 treesize of output 53 [2021-11-25 19:07:02,481 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:07:03,111 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '708#(and (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~p~0#1| 4) |ULTIMATE.start_main_~n~0#1|))))) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~p~0#1| 4) |ULTIMATE.start_main_~n~0#1|)))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (ite (= (mod |ULTIMATE.start_main_#t~mem10#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~p~0#1| 4) |ULTIMATE.start_main_~n~0#1|))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~p~0#1| 1800) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 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|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:07:03,111 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:07:03,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:07:03,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-25 19:07:03,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559581195] [2021-11-25 19:07:03,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:07:03,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:07:03,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:07:03,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:07:03,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:07:03,113 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:07:03,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:07:03,242 INFO L93 Difference]: Finished difference Result 64 states and 89 transitions. [2021-11-25 19:07:03,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:07:03,243 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-25 19:07:03,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:07:03,244 INFO L225 Difference]: With dead ends: 64 [2021-11-25 19:07:03,244 INFO L226 Difference]: Without dead ends: 44 [2021-11-25 19:07:03,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:07:03,245 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 41 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:07:03,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 18 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:07:03,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-25 19:07:03,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-11-25 19:07:03,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 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) [2021-11-25 19:07:03,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-11-25 19:07:03,263 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 18 [2021-11-25 19:07:03,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:07:03,264 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-11-25 19:07:03,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:07:03,264 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-11-25 19:07:03,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 19:07:03,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:07:03,265 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:07:03,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:07:03,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:07:03,484 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:07:03,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:07:03,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1426358148, now seen corresponding path program 2 times [2021-11-25 19:07:03,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:07:03,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058400852] [2021-11-25 19:07:03,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:03,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:07:03,500 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:07:03,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613698238] [2021-11-25 19:07:03,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:07:03,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:07:03,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:07:03,503 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:07:03,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:07:03,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 19:07:03,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:07:03,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:07:03,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:07:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 19:07:03,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:07:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-25 19:07:03,737 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:07:03,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058400852] [2021-11-25 19:07:03,737 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:07:03,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613698238] [2021-11-25 19:07:03,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613698238] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:07:03,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [404655570] [2021-11-25 19:07:03,742 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 19:07:03,743 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:07:03,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:07:03,743 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:07:03,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:07:03,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,854 INFO L354 Elim1Store]: treesize reduction 178, result has 22.3 percent of original size [2021-11-25 19:07:03,855 INFO L388 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 46 treesize of output 76 [2021-11-25 19:07:03,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:03,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,003 INFO L354 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2021-11-25 19:07:04,004 INFO L388 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 [2021-11-25 19:07:04,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,093 INFO L388 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 93 treesize of output 69 [2021-11-25 19:07:04,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:04,293 INFO L354 Elim1Store]: treesize reduction 172, result has 15.7 percent of original size [2021-11-25 19:07:04,294 INFO L388 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 470 treesize of output 438 [2021-11-25 19:07:04,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:04,397 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-25 19:07:04,398 INFO L388 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 78 treesize of output 53 [2021-11-25 19:07:04,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:07:04,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:04,676 INFO L354 Elim1Store]: treesize reduction 168, result has 17.6 percent of original size [2021-11-25 19:07:04,677 INFO L388 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 299 treesize of output 279 [2021-11-25 19:07:04,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:04,751 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-25 19:07:04,752 INFO L388 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 78 treesize of output 53 [2021-11-25 19:07:04,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:04,977 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-25 19:07:04,977 INFO L388 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 78 treesize of output 53 [2021-11-25 19:07:05,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:05,054 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-25 19:07:05,055 INFO L388 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 78 treesize of output 53 [2021-11-25 19:07:05,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:05,204 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-25 19:07:05,205 INFO L388 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 78 treesize of output 53 [2021-11-25 19:07:05,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:05,244 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-25 19:07:05,245 INFO L388 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 78 treesize of output 53 [2021-11-25 19:07:05,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:05,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:05,442 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-25 19:07:05,442 INFO L388 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 72 treesize of output 91 [2021-11-25 19:07:05,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:05,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:05,546 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-25 19:07:05,546 INFO L388 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 72 treesize of output 91 [2021-11-25 19:07:05,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:05,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:05,804 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-25 19:07:05,805 INFO L388 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 72 treesize of output 91 [2021-11-25 19:07:05,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:05,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:06,024 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-25 19:07:06,024 INFO L388 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 72 treesize of output 91 [2021-11-25 19:07:06,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:06,364 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-25 19:07:06,365 INFO L388 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 78 treesize of output 53 [2021-11-25 19:07:06,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:07:06,404 INFO L354 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2021-11-25 19:07:06,405 INFO L388 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 78 treesize of output 53 [2021-11-25 19:07:06,412 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:07:07,064 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1042#(and (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#B~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#B~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~p~0#1| 4) |ULTIMATE.start_main_~n~0#1|))))) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#C~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#C~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~p~0#1| 4) |ULTIMATE.start_main_~n~0#1|)))) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (= |ULTIMATE.start_main_~#C~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= (ite (= (mod |ULTIMATE.start_main_#t~mem10#1| 4294967296) (mod (+ |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem8#1| (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) (* |ULTIMATE.start_main_~j~0#1| (* |ULTIMATE.start_main_~p~0#1| 4)) |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* (* |ULTIMATE.start_main_~p~0#1| 4) |ULTIMATE.start_main_~n~0#1|))))) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_main_~p~0#1| 1800) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 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|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:07:07,064 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:07:07,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:07:07,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-25 19:07:07,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860176233] [2021-11-25 19:07:07,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:07:07,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:07:07,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:07:07,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:07:07,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:07:07,067 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:07:07,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:07:07,241 INFO L93 Difference]: Finished difference Result 167 states and 219 transitions. [2021-11-25 19:07:07,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:07:07,242 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-25 19:07:07,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:07:07,253 INFO L225 Difference]: With dead ends: 167 [2021-11-25 19:07:07,253 INFO L226 Difference]: Without dead ends: 140 [2021-11-25 19:07:07,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 13 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:07:07,256 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 114 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:07:07,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 28 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:07:07,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-25 19:07:07,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 85. [2021-11-25 19:07:07,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2857142857142858) internal successors, (108), 84 states have internal predecessors, (108), 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) [2021-11-25 19:07:07,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 108 transitions. [2021-11-25 19:07:07,299 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 108 transitions. Word has length 24 [2021-11-25 19:07:07,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:07:07,300 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 108 transitions. [2021-11-25 19:07:07,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:07:07,300 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 108 transitions. [2021-11-25 19:07:07,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-25 19:07:07,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:07:07,305 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:07:07,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:07:07,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 19:07:07,520 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:07:07,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:07:07,521 INFO L85 PathProgramCache]: Analyzing trace with hash -618004630, now seen corresponding path program 3 times [2021-11-25 19:07:07,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:07:07,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246328523] [2021-11-25 19:07:07,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:07,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:07:07,569 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:07:07,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181865882] [2021-11-25 19:07:07,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:07:07,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:07:07,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:07:07,580 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:07:07,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91e163ca-680d-47c3-9f81-064578e486cb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process