./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/init-non-constant-2-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_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/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_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/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_f6ab30fd-e246-4313-9729-5d06856ce5ec/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 4fa401c700a21fa1f98a1481c8e8ba1555a45c0429555dc041a1c04ce1059991 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:38:04,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:38:04,213 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:38:04,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:38:04,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:38:04,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:38:04,267 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:38:04,270 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:38:04,273 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:38:04,275 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:38:04,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:38:04,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:38:04,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:38:04,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:38:04,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:38:04,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:38:04,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:38:04,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:38:04,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:38:04,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:38:04,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:38:04,297 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:38:04,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:38:04,301 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:38:04,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:38:04,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:38:04,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:38:04,308 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:38:04,309 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:38:04,311 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:38:04,311 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:38:04,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:38:04,314 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:38:04,315 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:38:04,317 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:38:04,317 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:38:04,318 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:38:04,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:38:04,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:38:04,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:38:04,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:38:04,323 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:38:04,353 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:38:04,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:38:04,354 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:38:04,354 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:38:04,355 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:38:04,355 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:38:04,355 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:38:04,356 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:38:04,356 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:38:04,357 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:38:04,357 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:38:04,357 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:38:04,362 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:38:04,362 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:38:04,363 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:38:04,363 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:38:04,363 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:38:04,363 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:38:04,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:38:04,365 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:38:04,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:38:04,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:38:04,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:38:04,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:38:04,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:38:04,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:38:04,367 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:38:04,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:38:04,368 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:38:04,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:38:04,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:38:04,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:38:04,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:38:04,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:38:04,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:38:04,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:38:04,372 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:38:04,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:38:04,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:38:04,373 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:38:04,373 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:38:04,373 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_f6ab30fd-e246-4313-9729-5d06856ce5ec/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fa401c700a21fa1f98a1481c8e8ba1555a45c0429555dc041a1c04ce1059991 [2021-11-25 19:38:04,743 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:38:04,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:38:04,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:38:04,777 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:38:04,778 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:38:04,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c [2021-11-25 19:38:04,864 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/data/b34f34ea7/d44ce5fb8c70497e81f76b45f6650f43/FLAG383d4b8a8 [2021-11-25 19:38:05,381 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:38:05,381 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c [2021-11-25 19:38:05,389 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/data/b34f34ea7/d44ce5fb8c70497e81f76b45f6650f43/FLAG383d4b8a8 [2021-11-25 19:38:05,744 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/data/b34f34ea7/d44ce5fb8c70497e81f76b45f6650f43 [2021-11-25 19:38:05,747 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:38:05,749 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:38:05,751 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:38:05,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:38:05,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:38:05,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:38:05" (1/1) ... [2021-11-25 19:38:05,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25d31f87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:05, skipping insertion in model container [2021-11-25 19:38:05,759 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:38:05" (1/1) ... [2021-11-25 19:38:05,767 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:38:05,783 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:38:06,011 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_f6ab30fd-e246-4313-9729-5d06856ce5ec/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c[421,434] [2021-11-25 19:38:06,031 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:38:06,041 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:38:06,056 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_f6ab30fd-e246-4313-9729-5d06856ce5ec/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c[421,434] [2021-11-25 19:38:06,066 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:38:06,083 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:38:06,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:06 WrapperNode [2021-11-25 19:38:06,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:38:06,085 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:38:06,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:38:06,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:38:06,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:06" (1/1) ... [2021-11-25 19:38:06,105 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:06" (1/1) ... [2021-11-25 19:38:06,137 INFO L137 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2021-11-25 19:38:06,138 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:38:06,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:38:06,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:38:06,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:38:06,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:06" (1/1) ... [2021-11-25 19:38:06,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:06" (1/1) ... [2021-11-25 19:38:06,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:06" (1/1) ... [2021-11-25 19:38:06,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:06" (1/1) ... [2021-11-25 19:38:06,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:06" (1/1) ... [2021-11-25 19:38:06,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:06" (1/1) ... [2021-11-25 19:38:06,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:06" (1/1) ... [2021-11-25 19:38:06,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:38:06,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:38:06,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:38:06,193 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:38:06,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:06" (1/1) ... [2021-11-25 19:38:06,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:38:06,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:38:06,239 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:38:06,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:38:06,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:38:06,313 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 19:38:06,313 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 19:38:06,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:38:06,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:38:06,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:38:06,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:38:06,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:38:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:38:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:38:06,407 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:38:06,409 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:38:06,549 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:38:06,583 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:38:06,584 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-25 19:38:06,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:38:06 BoogieIcfgContainer [2021-11-25 19:38:06,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:38:06,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:38:06,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:38:06,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:38:06,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:38:05" (1/3) ... [2021-11-25 19:38:06,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1045dba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:38:06, skipping insertion in model container [2021-11-25 19:38:06,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:38:06" (2/3) ... [2021-11-25 19:38:06,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1045dba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:38:06, skipping insertion in model container [2021-11-25 19:38:06,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:38:06" (3/3) ... [2021-11-25 19:38:06,598 INFO L111 eAbstractionObserver]: Analyzing ICFG init-non-constant-2-n-u.c [2021-11-25 19:38:06,605 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:38:06,605 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:38:06,668 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:38:06,690 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 19:38:06,703 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:38:06,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:38:06,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 19:38:06,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:06,741 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:38:06,742 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:06,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:06,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1625058095, now seen corresponding path program 1 times [2021-11-25 19:38:06,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:06,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666340567] [2021-11-25 19:38:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:06,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:06,901 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:38:06,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443717347] [2021-11-25 19:38:06,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:06,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:06,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:38:06,905 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:38:06,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:38:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:07,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:38:07,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:38:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:38:07,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:38:07,255 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:07,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666340567] [2021-11-25 19:38:07,255 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:38:07,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443717347] [2021-11-25 19:38:07,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443717347] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:38:07,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:38:07,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:38:07,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510127914] [2021-11-25 19:38:07,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:38:07,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:38:07,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:38:07,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:38:07,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:38:07,332 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 11 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:38:07,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:38:07,441 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2021-11-25 19:38:07,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:38:07,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 12 [2021-11-25 19:38:07,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:38:07,476 INFO L225 Difference]: With dead ends: 32 [2021-11-25 19:38:07,476 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 19:38:07,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:38:07,484 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:38:07,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 20 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:38:07,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 19:38:07,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2021-11-25 19:38:07,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:38:07,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2021-11-25 19:38:07,545 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 12 [2021-11-25 19:38:07,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:38:07,546 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2021-11-25 19:38:07,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:38:07,547 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2021-11-25 19:38:07,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 19:38:07,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:07,548 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:38:07,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:38:07,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-25 19:38:07,761 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:07,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:07,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1966088254, now seen corresponding path program 1 times [2021-11-25 19:38:07,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:07,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037750757] [2021-11-25 19:38:07,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:07,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:07,796 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:38:07,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384168275] [2021-11-25 19:38:07,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:07,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:07,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:38:07,808 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:38:07,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:38:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:07,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:38:07,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:38:07,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:38:07,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:38:07,975 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:07,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037750757] [2021-11-25 19:38:07,978 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:38:07,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384168275] [2021-11-25 19:38:07,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384168275] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:38:07,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:38:07,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:38:07,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659055514] [2021-11-25 19:38:07,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:38:07,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:38:07,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:38:07,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:38:07,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:38:07,985 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:38:08,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:38:08,111 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2021-11-25 19:38:08,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:38:08,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2021-11-25 19:38:08,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:38:08,114 INFO L225 Difference]: With dead ends: 35 [2021-11-25 19:38:08,114 INFO L226 Difference]: Without dead ends: 21 [2021-11-25 19:38:08,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:38:08,120 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:38:08,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 30 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:38:08,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-25 19:38:08,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2021-11-25 19:38:08,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:38:08,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-11-25 19:38:08,135 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 14 [2021-11-25 19:38:08,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:38:08,136 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-11-25 19:38:08,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:38:08,136 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-11-25 19:38:08,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 19:38:08,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:08,138 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:38:08,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 19:38:08,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-25 19:38:08,364 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:08,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:08,365 INFO L85 PathProgramCache]: Analyzing trace with hash -268377018, now seen corresponding path program 1 times [2021-11-25 19:38:08,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:08,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969202355] [2021-11-25 19:38:08,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:08,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:08,376 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:38:08,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732165784] [2021-11-25 19:38:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:08,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:08,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:38:08,379 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:38:08,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:38:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:08,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 19:38:08,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:38:08,618 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:38:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:38:08,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:38:09,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-11-25 19:38:09,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2021-11-25 19:38:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:38:09,710 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:09,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969202355] [2021-11-25 19:38:09,711 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:38:09,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732165784] [2021-11-25 19:38:09,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732165784] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:38:09,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1998620362] [2021-11-25 19:38:09,736 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 19:38:09,737 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:38:09,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:38:09,749 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:38:09,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:38:09,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:09,858 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-25 19:38:09,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2021-11-25 19:38:09,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:09,924 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:38:09,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:38:10,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:10,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-25 19:38:10,726 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 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-25 19:38:11,392 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2021-11-25 19:38:11,466 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:38:13,755 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '359#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_#t~mem7#1| 4294967296) (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (< |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~s~0#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start_main_~j~0#1| 0) (<= |ULTIMATE.start_main_~s~0#1| 2147483647) (<= |ULTIMATE.start_main_~q~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:38:13,755 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:38:13,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:38:13,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-25 19:38:13,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673182491] [2021-11-25 19:38:13,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:38:13,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 19:38:13,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:38:13,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 19:38:13,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-11-25 19:38:13,765 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:38:14,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:38:14,005 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2021-11-25 19:38:14,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 19:38:14,009 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 15 [2021-11-25 19:38:14,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:38:14,010 INFO L225 Difference]: With dead ends: 48 [2021-11-25 19:38:14,010 INFO L226 Difference]: Without dead ends: 46 [2021-11-25 19:38:14,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-11-25 19:38:14,012 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 43 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:38:14,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 62 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 89 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2021-11-25 19:38:14,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-25 19:38:14,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 22. [2021-11-25 19:38:14,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:38:14,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-25 19:38:14,028 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 15 [2021-11-25 19:38:14,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:38:14,028 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-25 19:38:14,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:38:14,029 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-25 19:38:14,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 19:38:14,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:14,032 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:38:14,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:38:14,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:14,246 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:14,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:14,247 INFO L85 PathProgramCache]: Analyzing trace with hash 2014206027, now seen corresponding path program 1 times [2021-11-25 19:38:14,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:14,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525979292] [2021-11-25 19:38:14,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:14,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:14,256 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:38:14,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183624751] [2021-11-25 19:38:14,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:14,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:14,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:38:14,258 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:38:14,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:38:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:38:14,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:38:14,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:38:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:38:14,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:38:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:38:14,503 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:14,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525979292] [2021-11-25 19:38:14,504 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:38:14,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183624751] [2021-11-25 19:38:14,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183624751] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:38:14,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [769636799] [2021-11-25 19:38:14,508 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 19:38:14,508 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:38:14,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:38:14,509 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:38:14,510 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:38:14,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:14,578 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:38:14,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:38:14,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:14,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2021-11-25 19:38:14,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:14,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2021-11-25 19:38:15,062 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 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-25 19:38:15,645 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2021-11-25 19:38:15,708 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:38:17,511 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '603#(and (<= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 1500 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~n~0#1| 1500) (<= 0 |ULTIMATE.start_main_~#A~0#1.offset|) (<= 0 |ULTIMATE.start_main_~q~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~s~0#1| 2147483647) (<= |ULTIMATE.start_main_~q~0#1| 2147483647) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:38:17,511 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:38:17,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:38:17,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-25 19:38:17,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976582791] [2021-11-25 19:38:17,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:38:17,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:38:17,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:38:17,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:38:17,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-11-25 19:38:17,514 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:38:17,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:38:17,677 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2021-11-25 19:38:17,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:38:17,678 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-11-25 19:38:17,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:38:17,680 INFO L225 Difference]: With dead ends: 61 [2021-11-25 19:38:17,680 INFO L226 Difference]: Without dead ends: 51 [2021-11-25 19:38:17,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-11-25 19:38:17,682 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:38:17,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 48 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:38:17,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-25 19:38:17,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2021-11-25 19:38:17,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:38:17,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2021-11-25 19:38:17,696 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 18 [2021-11-25 19:38:17,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:38:17,696 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2021-11-25 19:38:17,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:38:17,697 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2021-11-25 19:38:17,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 19:38:17,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:17,698 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:38:17,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:38:17,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:17,914 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:17,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:17,914 INFO L85 PathProgramCache]: Analyzing trace with hash 975332529, now seen corresponding path program 2 times [2021-11-25 19:38:17,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:17,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752772445] [2021-11-25 19:38:17,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:17,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:17,923 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:38:17,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561247674] [2021-11-25 19:38:17,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:38:17,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:17,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:38:17,925 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:38:17,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:38:18,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:38:18,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:38:18,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-25 19:38:18,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:38:18,095 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:38:18,176 INFO L354 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2021-11-25 19:38:18,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 51 [2021-11-25 19:38:18,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:38:18,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 60 [2021-11-25 19:38:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:38:18,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:38:24,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-11-25 19:38:24,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 113 [2021-11-25 19:38:43,391 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_59| Int) (|aux_mod_ULTIMATE.start_main_~C~0#1_45| Int)) (or (<= (+ |v_ULTIMATE.start_main_~j~0#1_59| 1) 0) (and (= (* 4 (* |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~n~0#1|)) 0) (forall ((|aux_mod_v_ULTIMATE.start_main_~i~0#1_49_128| Int) (|aux_div_v_ULTIMATE.start_main_~i~0#1_49_128| Int)) (or (< |aux_mod_v_ULTIMATE.start_main_~i~0#1_49_128| 0) (not (= (+ (* 4 (* |aux_mod_v_ULTIMATE.start_main_~i~0#1_49_128| |c_ULTIMATE.start_main_~n~0#1|)) (* 4 |v_ULTIMATE.start_main_~j~0#1_59|) (* 17179869184 (* |c_ULTIMATE.start_main_~n~0#1| |aux_div_v_ULTIMATE.start_main_~i~0#1_49_128|))) (+ (* 4 (* |v_ULTIMATE.start_main_~j~0#1_59| |c_ULTIMATE.start_main_~n~0#1|)) (* 4 (* |c_ULTIMATE.start_main_~n~0#1| |aux_mod_ULTIMATE.start_main_~C~0#1_45|))))) (<= (+ |aux_mod_v_ULTIMATE.start_main_~i~0#1_49_128| (* 4294967296 |aux_div_v_ULTIMATE.start_main_~i~0#1_49_128|) 1) (+ |aux_mod_ULTIMATE.start_main_~C~0#1_45| |v_ULTIMATE.start_main_~j~0#1_59|)) (= |aux_mod_ULTIMATE.start_main_~C~0#1_45| |aux_mod_v_ULTIMATE.start_main_~i~0#1_49_128|) (<= 4294967296 |aux_mod_v_ULTIMATE.start_main_~i~0#1_49_128|))) (= |aux_mod_ULTIMATE.start_main_~C~0#1_45| (mod (+ |aux_mod_ULTIMATE.start_main_~C~0#1_45| |c_ULTIMATE.start_main_~i~0#1|) 4294967296))) (< |aux_mod_ULTIMATE.start_main_~C~0#1_45| 0) (<= 4294967296 |aux_mod_ULTIMATE.start_main_~C~0#1_45|))) is different from false [2021-11-25 19:38:44,394 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:44,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752772445] [2021-11-25 19:38:44,394 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:38:44,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561247674] [2021-11-25 19:38:44,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561247674] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:38:44,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1574510881] [2021-11-25 19:38:44,398 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 19:38:44,398 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:38:44,398 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:38:44,399 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:38:44,399 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:38:44,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:44,465 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-25 19:38:44,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2021-11-25 19:38:44,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:44,526 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:38:44,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:38:44,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:44,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-25 19:38:44,892 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 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-25 19:38:45,259 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2021-11-25 19:38:45,312 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:38:48,146 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '896#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_#t~mem7#1| 4294967296) (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (< |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~s~0#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start_main_~j~0#1| 0) (<= |ULTIMATE.start_main_~s~0#1| 2147483647) (<= |ULTIMATE.start_main_~q~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:38:48,146 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:38:48,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:38:48,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-25 19:38:48,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757957599] [2021-11-25 19:38:48,147 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 19:38:48,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:38:48,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:38:48,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:38:48,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=536, Unknown=3, NotChecked=48, Total=702 [2021-11-25 19:38:48,148 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 10 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:38:48,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:38:48,748 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2021-11-25 19:38:48,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 19:38:48,749 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-11-25 19:38:48,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:38:48,751 INFO L225 Difference]: With dead ends: 49 [2021-11-25 19:38:48,751 INFO L226 Difference]: Without dead ends: 47 [2021-11-25 19:38:48,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=225, Invalid=898, Unknown=3, NotChecked=64, Total=1190 [2021-11-25 19:38:48,754 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 7 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:38:48,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 40 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 38 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2021-11-25 19:38:48,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-25 19:38:48,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-11-25 19:38:48,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.375) internal successors, (55), 40 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:38:48,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2021-11-25 19:38:48,767 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 18 [2021-11-25 19:38:48,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:38:48,768 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2021-11-25 19:38:48,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:38:48,768 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2021-11-25 19:38:48,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 19:38:48,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:38:48,770 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:38:48,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:38:48,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:48,984 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:38:48,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:38:48,984 INFO L85 PathProgramCache]: Analyzing trace with hash -716318637, now seen corresponding path program 2 times [2021-11-25 19:38:48,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:38:48,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75151803] [2021-11-25 19:38:48,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:38:48,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:38:48,993 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:38:49,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568771771] [2021-11-25 19:38:49,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:38:49,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:38:49,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:38:49,014 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:38:49,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:38:49,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:38:49,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:38:49,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-25 19:38:49,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:38:49,186 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 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:38:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:38:49,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:38:49,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-11-25 19:38:49,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2021-11-25 19:38:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:38:50,996 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:38:50,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75151803] [2021-11-25 19:38:50,997 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:38:50,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568771771] [2021-11-25 19:38:50,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568771771] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:38:50,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2043074123] [2021-11-25 19:38:51,000 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 19:38:51,000 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:38:51,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:38:51,001 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:38:51,001 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:38:51,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:51,076 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:38:51,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:38:51,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:51,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2021-11-25 19:38:51,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:38:51,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2021-11-25 19:38:51,512 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 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-25 19:38:51,968 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2021-11-25 19:38:52,019 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:38:54,104 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1214#(and (<= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 1500 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~n~0#1| 1500) (<= 0 |ULTIMATE.start_main_~#A~0#1.offset|) (<= 0 |ULTIMATE.start_main_~q~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~s~0#1| 2147483647) (<= |ULTIMATE.start_main_~q~0#1| 2147483647) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:38:54,104 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:38:54,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:38:54,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-25 19:38:54,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284044317] [2021-11-25 19:38:54,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:38:54,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-25 19:38:54,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:38:54,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-25 19:38:54,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-11-25 19:38:54,107 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:39:00,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:39:00,705 INFO L93 Difference]: Finished difference Result 152 states and 192 transitions. [2021-11-25 19:39:00,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-25 19:39:00,706 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2021-11-25 19:39:00,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:39:00,709 INFO L225 Difference]: With dead ends: 152 [2021-11-25 19:39:00,709 INFO L226 Difference]: Without dead ends: 150 [2021-11-25 19:39:00,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=648, Invalid=3384, Unknown=0, NotChecked=0, Total=4032 [2021-11-25 19:39:00,714 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 108 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-25 19:39:00,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 195 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 406 Invalid, 0 Unknown, 34 Unchecked, 1.8s Time] [2021-11-25 19:39:00,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-25 19:39:00,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 60. [2021-11-25 19:39:00,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.375) internal successors, (77), 56 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:39:00,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2021-11-25 19:39:00,742 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 19 [2021-11-25 19:39:00,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:39:00,743 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2021-11-25 19:39:00,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:39:00,743 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2021-11-25 19:39:00,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 19:39:00,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:39:00,745 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:39:00,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:39:00,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:39:00,958 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:39:00,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:39:00,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1342601893, now seen corresponding path program 1 times [2021-11-25 19:39:00,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:39:00,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595520269] [2021-11-25 19:39:00,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:39:00,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:39:00,966 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:39:00,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1282088478] [2021-11-25 19:39:00,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:39:00,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:39:00,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:39:00,982 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:39:00,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:39:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:39:01,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:39:01,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:39:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:39:01,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:39:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:39:01,225 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:39:01,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595520269] [2021-11-25 19:39:01,226 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:39:01,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282088478] [2021-11-25 19:39:01,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282088478] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:39:01,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1193704425] [2021-11-25 19:39:01,228 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 19:39:01,229 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:39:01,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:39:01,230 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:39:01,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:39:01,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:39:01,292 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-25 19:39:01,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2021-11-25 19:39:01,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:39:01,346 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:39:01,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:39:01,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:39:01,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-25 19:39:01,701 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 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-25 19:39:02,591 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2021-11-25 19:39:02,637 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:39:04,724 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1780#(and (= |ULTIMATE.start_main_~m~0#1| 1000) (<= |ULTIMATE.start_main_~i~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (= (ite (= (mod |ULTIMATE.start_main_#t~mem7#1| 4294967296) (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (< |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~s~0#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (<= |ULTIMATE.start_main_~s~0#1| 2147483647) (<= |ULTIMATE.start_main_~q~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:39:04,724 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:39:04,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:39:04,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-25 19:39:04,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035009885] [2021-11-25 19:39:04,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:39:04,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:39:04,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:39:04,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:39:04,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-11-25 19:39:04,727 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:39:04,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:39:04,885 INFO L93 Difference]: Finished difference Result 118 states and 153 transitions. [2021-11-25 19:39:04,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:39:04,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-11-25 19:39:04,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:39:04,893 INFO L225 Difference]: With dead ends: 118 [2021-11-25 19:39:04,893 INFO L226 Difference]: Without dead ends: 96 [2021-11-25 19:39:04,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:39:04,897 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:39:04,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 36 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:39:04,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-25 19:39:04,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 59. [2021-11-25 19:39:04,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.309090909090909) internal successors, (72), 55 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:39:04,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2021-11-25 19:39:04,918 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 20 [2021-11-25 19:39:04,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:39:04,918 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2021-11-25 19:39:04,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:39:04,919 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2021-11-25 19:39:04,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 19:39:04,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:39:04,921 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:39:04,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:39:05,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 19:39:05,134 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:39:05,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:39:05,134 INFO L85 PathProgramCache]: Analyzing trace with hash 336047915, now seen corresponding path program 3 times [2021-11-25 19:39:05,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:39:05,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020736918] [2021-11-25 19:39:05,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:39:05,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:39:05,140 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:39:05,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963595290] [2021-11-25 19:39:05,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:39:05,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:39:05,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:39:05,141 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:39:05,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:39:05,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:39:05,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:39:05,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-25 19:39:05,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:39:05,319 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 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-25 19:39:05,366 INFO L354 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2021-11-25 19:39:05,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-25 19:39:05,456 INFO L354 Elim1Store]: treesize reduction 55, result has 21.4 percent of original size [2021-11-25 19:39:05,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-11-25 19:39:05,538 INFO L354 Elim1Store]: treesize reduction 84, result has 18.4 percent of original size [2021-11-25 19:39:05,538 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 39 treesize of output 41 [2021-11-25 19:39:05,736 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:39:05,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:39:34,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 70 [2021-11-25 19:39:34,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8780 treesize of output 8748 [2021-11-25 19:46:17,528 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:46:17,528 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:46:17,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020736918] [2021-11-25 19:46:17,529 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:46:17,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963595290] [2021-11-25 19:46:17,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963595290] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:46:17,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [706880549] [2021-11-25 19:46:17,531 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 19:46:17,531 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:46:17,531 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:46:17,531 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:46:17,531 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:46:17,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:17,583 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-25 19:46:17,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2021-11-25 19:46:17,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:17,629 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:46:17,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:46:17,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:46:17,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-25 19:46:17,909 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 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-25 19:46:18,155 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2021-11-25 19:46:18,189 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:46:20,125 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2241#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_#t~mem7#1| 4294967296) (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (< |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~s~0#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start_main_~j~0#1| 0) (<= |ULTIMATE.start_main_~s~0#1| 2147483647) (<= |ULTIMATE.start_main_~q~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:46:20,125 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:46:20,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:46:20,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-25 19:46:20,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261036326] [2021-11-25 19:46:20,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:46:20,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-25 19:46:20,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:46:20,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-25 19:46:20,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=874, Unknown=6, NotChecked=0, Total=1056 [2021-11-25 19:46:20,127 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:46:53,863 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~j~0#1_122| Int) (v_ArrVal_92 Int)) (or (< |v_ULTIMATE.start_main_~j~0#1_122| (+ |c_ULTIMATE.start_main_~j~0#1| 1)) (= (mod (select (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| (* |c_ULTIMATE.start_main_~n~0#1| 4)))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base|) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse0 (* |c_ULTIMATE.start_main_~j~0#1| 4)) (+ |c_ULTIMATE.start_main_~C~0#1| |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~j~0#1|)) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse0 (* |v_ULTIMATE.start_main_~j~0#1_122| 4)) v_ArrVal_92)) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296) (mod |c_ULTIMATE.start_main_~C~0#1| 4294967296)))) (forall ((|v_ULTIMATE.start_main_~j~0#1_122| Int) (v_ArrVal_92 Int)) (or (= (mod (select (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| (* |c_ULTIMATE.start_main_~n~0#1| 4)))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base|) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse1) (+ |c_ULTIMATE.start_main_~C~0#1| |c_ULTIMATE.start_main_~i~0#1|)) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| .cse1 (* |v_ULTIMATE.start_main_~j~0#1_122| 4)) v_ArrVal_92)) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296) (mod |c_ULTIMATE.start_main_~C~0#1| 4294967296)) (< |v_ULTIMATE.start_main_~j~0#1_122| 1))) (= (mod (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base|) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296) (mod |c_ULTIMATE.start_main_~C~0#1| 4294967296))) is different from false [2021-11-25 19:46:59,244 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:46:59,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:46:59,643 INFO L93 Difference]: Finished difference Result 140 states and 178 transitions. [2021-11-25 19:46:59,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-25 19:46:59,644 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2021-11-25 19:46:59,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:46:59,645 INFO L225 Difference]: With dead ends: 140 [2021-11-25 19:46:59,645 INFO L226 Difference]: Without dead ends: 138 [2021-11-25 19:46:59,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 69.1s TimeCoverageRelationStatistics Valid=437, Invalid=2089, Unknown=28, NotChecked=98, Total=2652 [2021-11-25 19:46:59,647 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 89 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:46:59,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 174 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 237 Invalid, 0 Unknown, 213 Unchecked, 1.5s Time] [2021-11-25 19:46:59,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-25 19:46:59,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 86. [2021-11-25 19:46:59,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.3414634146341464) internal successors, (110), 82 states have internal predecessors, (110), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:46:59,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 114 transitions. [2021-11-25 19:46:59,668 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 114 transitions. Word has length 20 [2021-11-25 19:46:59,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:46:59,669 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 114 transitions. [2021-11-25 19:46:59,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:46:59,669 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 114 transitions. [2021-11-25 19:46:59,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 19:46:59,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:46:59,671 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:46:59,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:46:59,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:46:59,874 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:46:59,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:46:59,874 INFO L85 PathProgramCache]: Analyzing trace with hash 376973547, now seen corresponding path program 4 times [2021-11-25 19:46:59,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:46:59,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193136442] [2021-11-25 19:46:59,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:46:59,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:46:59,879 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:46:59,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13484232] [2021-11-25 19:46:59,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:46:59,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:46:59,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:46:59,897 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:46:59,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:46:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:46:59,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:46:59,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:47:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:47:00,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:47:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:47:00,090 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:47:00,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193136442] [2021-11-25 19:47:00,090 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:47:00,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13484232] [2021-11-25 19:47:00,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13484232] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:47:00,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1684936217] [2021-11-25 19:47:00,093 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 19:47:00,093 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:47:00,093 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:47:00,093 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:47:00,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:47:00,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:00,141 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:47:00,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:47:00,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:00,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2021-11-25 19:47:00,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:47:00,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-25 19:47:00,347 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 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-25 19:47:00,551 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2021-11-25 19:47:00,590 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:47:02,165 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2825#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_#t~mem7#1| 4294967296) (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (< |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~s~0#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start_main_~j~0#1| 0) (<= |ULTIMATE.start_main_~s~0#1| 2147483647) (<= |ULTIMATE.start_main_~q~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:47:02,165 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:47:02,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:47:02,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-25 19:47:02,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690589674] [2021-11-25 19:47:02,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:47:02,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 19:47:02,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:47:02,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 19:47:02,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-11-25 19:47:02,168 INFO L87 Difference]: Start difference. First operand 86 states and 114 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:47:02,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:47:02,412 INFO L93 Difference]: Finished difference Result 188 states and 249 transitions. [2021-11-25 19:47:02,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 19:47:02,412 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2021-11-25 19:47:02,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:47:02,413 INFO L225 Difference]: With dead ends: 188 [2021-11-25 19:47:02,413 INFO L226 Difference]: Without dead ends: 135 [2021-11-25 19:47:02,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-11-25 19:47:02,415 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 77 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:47:02,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 74 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:47:02,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-25 19:47:02,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2021-11-25 19:47:02,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.36) internal successors, (136), 100 states have internal predecessors, (136), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:47:02,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 140 transitions. [2021-11-25 19:47:02,440 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 140 transitions. Word has length 22 [2021-11-25 19:47:02,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:47:02,441 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 140 transitions. [2021-11-25 19:47:02,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:47:02,441 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 140 transitions. [2021-11-25 19:47:02,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 19:47:02,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:47:02,443 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:47:02,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:47:02,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:47:02,650 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:47:02,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:47:02,650 INFO L85 PathProgramCache]: Analyzing trace with hash -360487098, now seen corresponding path program 3 times [2021-11-25 19:47:02,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:47:02,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182101329] [2021-11-25 19:47:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:47:02,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:47:02,656 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:47:02,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1416222522] [2021-11-25 19:47:02,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:47:02,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:47:02,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:47:02,662 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:47:02,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 19:47:02,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:47:02,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:47:02,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-25 19:47:02,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:47:02,819 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 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 19:47:02,893 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-11-25 19:47:02,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2021-11-25 19:47:02,940 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-11-25 19:47:02,941 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 41 treesize of output 43 [2021-11-25 19:47:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:47:03,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:47:06,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 134 [2021-11-25 19:47:06,495 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-25 19:47:06,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1466 treesize of output 1448 [2021-11-25 19:49:03,848 WARN L227 SmtUtils]: Spent 25.20s on a formula simplification. DAG size of input: 107 DAG size of output: 83 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:49:24,566 WARN L227 SmtUtils]: Spent 6.31s on a formula simplification that was a NOOP. DAG size: 84 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:49:27,989 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:49:27,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:49:27,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182101329] [2021-11-25 19:49:27,989 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:49:27,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416222522] [2021-11-25 19:49:27,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416222522] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:49:27,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2067724975] [2021-11-25 19:49:27,991 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 19:49:27,991 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:49:27,991 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:49:27,992 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:49:27,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:49:28,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,035 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-25 19:49:28,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2021-11-25 19:49:28,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,070 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:49:28,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:49:28,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:49:28,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2021-11-25 19:49:28,286 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 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-25 19:49:28,555 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2021-11-25 19:49:28,593 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:49:31,339 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3529#(and (<= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 1500 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~n~0#1| 1500) (<= 0 |ULTIMATE.start_main_~#A~0#1.offset|) (<= 0 |ULTIMATE.start_main_~q~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~s~0#1| 2147483647) (<= |ULTIMATE.start_main_~q~0#1| 2147483647) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:49:31,339 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:49:31,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:49:31,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-11-25 19:49:31,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922350919] [2021-11-25 19:49:31,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:49:31,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-25 19:49:31,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:49:31,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-25 19:49:31,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1353, Unknown=1, NotChecked=0, Total=1560 [2021-11-25 19:49:31,342 INFO L87 Difference]: Start difference. First operand 104 states and 140 transitions. Second operand has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:49:50,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:49:50,274 INFO L93 Difference]: Finished difference Result 240 states and 302 transitions. [2021-11-25 19:49:50,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-25 19:49:50,275 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2021-11-25 19:49:50,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:49:50,277 INFO L225 Difference]: With dead ends: 240 [2021-11-25 19:49:50,277 INFO L226 Difference]: Without dead ends: 238 [2021-11-25 19:49:50,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 64.6s TimeCoverageRelationStatistics Valid=514, Invalid=3645, Unknown=1, NotChecked=0, Total=4160 [2021-11-25 19:49:50,280 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 80 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:49:50,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 168 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 339 Invalid, 0 Unknown, 272 Unchecked, 2.5s Time] [2021-11-25 19:49:50,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-25 19:49:50,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 121. [2021-11-25 19:49:50,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 117 states have (on average 1.3504273504273505) internal successors, (158), 117 states have internal predecessors, (158), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:49:50,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 162 transitions. [2021-11-25 19:49:50,320 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 162 transitions. Word has length 23 [2021-11-25 19:49:50,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:49:50,320 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 162 transitions. [2021-11-25 19:49:50,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:49:50,321 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 162 transitions. [2021-11-25 19:49:50,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 19:49:50,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:49:50,322 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:49:50,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:49:50,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:50,526 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:49:50,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:49:50,526 INFO L85 PathProgramCache]: Analyzing trace with hash 539167014, now seen corresponding path program 4 times [2021-11-25 19:49:50,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:49:50,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151620389] [2021-11-25 19:49:50,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:49:50,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:49:50,530 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:49:50,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405275050] [2021-11-25 19:49:50,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:49:50,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:49:50,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:49:50,532 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:49:50,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 19:49:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:49:50,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-25 19:49:50,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:49:50,752 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 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-25 19:49:50,781 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-25 19:49:50,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-11-25 19:49:51,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:49:51,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:49:52,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 118 [2021-11-25 19:49:52,447 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-25 19:49:52,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 473 treesize of output 463 [2021-11-25 19:50:17,743 WARN L227 SmtUtils]: Spent 11.36s on a formula simplification. DAG size of input: 84 DAG size of output: 82 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:50:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:50:46,625 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:50:46,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151620389] [2021-11-25 19:50:46,626 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:50:46,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405275050] [2021-11-25 19:50:46,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405275050] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:50:46,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [965295070] [2021-11-25 19:50:46,628 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 19:50:46,628 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:50:46,628 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:50:46,628 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:50:46,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:50:46,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:46,673 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-25 19:50:46,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2021-11-25 19:50:46,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:46,710 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:50:46,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:50:46,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:50:46,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2021-11-25 19:50:46,955 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 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-25 19:50:47,214 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2021-11-25 19:50:47,244 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:50:49,346 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4391#(and (<= |ULTIMATE.start_main_~#A~0#1.offset| 0) (<= 1500 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~n~0#1| 1500) (<= 0 |ULTIMATE.start_main_~#A~0#1.offset|) (<= 0 |ULTIMATE.start_main_~q~0#1|) (<= |ULTIMATE.start_main_~j~0#1| 2147483647) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~s~0#1| 2147483647) (<= |ULTIMATE.start_main_~q~0#1| 2147483647) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:50:49,346 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:50:49,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:50:49,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-11-25 19:50:49,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450524948] [2021-11-25 19:50:49,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:50:49,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 19:50:49,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:50:49,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 19:50:49,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 19:50:49,348 INFO L87 Difference]: Start difference. First operand 121 states and 162 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:50:53,827 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-25 19:51:08,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:08,274 INFO L93 Difference]: Finished difference Result 179 states and 229 transitions. [2021-11-25 19:51:08,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 19:51:08,275 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2021-11-25 19:51:08,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:08,276 INFO L225 Difference]: With dead ends: 179 [2021-11-25 19:51:08,276 INFO L226 Difference]: Without dead ends: 177 [2021-11-25 19:51:08,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=360, Invalid=1896, Unknown=0, NotChecked=0, Total=2256 [2021-11-25 19:51:08,277 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 65 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 70 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:08,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 123 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 316 Invalid, 1 Unknown, 64 Unchecked, 4.5s Time] [2021-11-25 19:51:08,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-25 19:51:08,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 124. [2021-11-25 19:51:08,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 120 states have (on average 1.3416666666666666) internal successors, (161), 120 states have internal predecessors, (161), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:51:08,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 165 transitions. [2021-11-25 19:51:08,309 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 165 transitions. Word has length 23 [2021-11-25 19:51:08,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:08,309 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 165 transitions. [2021-11-25 19:51:08,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-25 19:51:08,310 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 165 transitions. [2021-11-25 19:51:08,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 19:51:08,311 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:08,311 INFO L514 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:08,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:08,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 19:51:08,526 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:51:08,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:08,526 INFO L85 PathProgramCache]: Analyzing trace with hash -932682509, now seen corresponding path program 5 times [2021-11-25 19:51:08,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:51:08,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805596299] [2021-11-25 19:51:08,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:08,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:51:08,531 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:51:08,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888877124] [2021-11-25 19:51:08,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:51:08,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:51:08,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:51:08,541 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:51:08,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:51:08,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-25 19:51:08,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:51:08,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:51:08,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:51:08,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:51:08,819 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:51:08,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805596299] [2021-11-25 19:51:08,819 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 19:51:08,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888877124] [2021-11-25 19:51:08,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888877124] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:51:08,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [260491673] [2021-11-25 19:51:08,822 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-25 19:51:08,822 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:51:08,822 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:51:08,822 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:51:08,823 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:51:08,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:08,881 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:51:08,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2021-11-25 19:51:08,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:08,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2021-11-25 19:51:09,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:51:09,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2021-11-25 19:51:09,134 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 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-25 19:51:09,229 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 97 for LOIs [2021-11-25 19:51:09,259 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:51:10,404 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5112#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~m~0#1| 1000) (<= 0 |ULTIMATE.start_main_~#A~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_#t~mem7#1| 4294967296) (mod (+ |ULTIMATE.start_main_~C~0#1| |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~j~0#1|) 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#A~0#1.offset| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~q~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (< |ULTIMATE.start_main_~j~0#1| |ULTIMATE.start_main_~s~0#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#A~0#1.base|) (+ |ULTIMATE.start_main_~#A~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~n~0#1| 4)) (* |ULTIMATE.start_main_~j~0#1| 4))) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start_main_~j~0#1| 0) (<= |ULTIMATE.start_main_~s~0#1| 2147483647) (<= |ULTIMATE.start_main_~q~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~n~0#1| 1500) (= |#NULL.base| 0))' at error location [2021-11-25 19:51:10,404 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:51:10,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:51:10,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-25 19:51:10,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978453059] [2021-11-25 19:51:10,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 19:51:10,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 19:51:10,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:51:10,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 19:51:10,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-11-25 19:51:10,406 INFO L87 Difference]: Start difference. First operand 124 states and 165 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:51:10,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:51:10,825 INFO L93 Difference]: Finished difference Result 243 states and 317 transitions. [2021-11-25 19:51:10,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 19:51:10,826 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-11-25 19:51:10,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:51:10,827 INFO L225 Difference]: With dead ends: 243 [2021-11-25 19:51:10,827 INFO L226 Difference]: Without dead ends: 191 [2021-11-25 19:51:10,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=264, Invalid=1068, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 19:51:10,829 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 154 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:51:10,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 109 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:51:10,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-25 19:51:10,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 150. [2021-11-25 19:51:10,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 146 states have (on average 1.3767123287671232) internal successors, (201), 146 states have internal predecessors, (201), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 19:51:10,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 205 transitions. [2021-11-25 19:51:10,869 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 205 transitions. Word has length 23 [2021-11-25 19:51:10,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:51:10,870 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 205 transitions. [2021-11-25 19:51:10,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-25 19:51:10,870 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 205 transitions. [2021-11-25 19:51:10,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 19:51:10,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:51:10,871 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:51:10,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:51:11,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 19:51:11,072 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:51:11,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:51:11,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1845637999, now seen corresponding path program 6 times [2021-11-25 19:51:11,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:51:11,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618715441] [2021-11-25 19:51:11,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:51:11,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:51:11,076 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 19:51:11,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085765227] [2021-11-25 19:51:11,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:51:11,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:51:11,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:51:11,078 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:51:11,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6ab30fd-e246-4313-9729-5d06856ce5ec/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 19:51:11,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:51:11,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:51:11,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-25 19:51:11,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:51:11,250 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 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-25 19:51:11,312 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-25 19:51:11,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-25 19:51:11,368 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-25 19:51:11,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-25 19:51:11,428 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-25 19:51:11,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-11-25 19:51:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:51:11,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:51:50,893 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_240| Int) (v_ArrVal_224 Int) (v_ArrVal_221 Int) (|v_ULTIMATE.start_main_~j~0#1_238| Int)) (or (< |v_ULTIMATE.start_main_~j~0#1_238| 0) (= (mod |c_ULTIMATE.start_main_~C~0#1| 4294967296) (mod (select (let ((.cse0 (* |c_ULTIMATE.start_main_~n~0#1| 4))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#A~0#1.base|) (+ (* (+ |c_ULTIMATE.start_main_~i~0#1| 1) .cse0) |c_ULTIMATE.start_main_~#A~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_240| 4)) v_ArrVal_221) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_238| 4) (* (+ 2 |c_ULTIMATE.start_main_~i~0#1|) .cse0)) v_ArrVal_224) (+ |c_ULTIMATE.start_main_~#A~0#1.offset| (* (+ 3 |c_ULTIMATE.start_main_~i~0#1|) .cse0)) (+ 3 |c_ULTIMATE.start_main_~C~0#1| |c_ULTIMATE.start_main_~i~0#1|))) |c_ULTIMATE.start_main_~#A~0#1.offset|) 4294967296)) (< |v_ULTIMATE.start_main_~j~0#1_240| 0))) is different from false [2021-11-25 19:51:50,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 72 [2021-11-25 19:51:50,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4662 treesize of output 4646