./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_mul_init.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_mul_init.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS --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 08288106b555461ef057d9cc6ff3152dcec81ba7fba064f1bc055561de30be9f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:03:35,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:03:35,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:03:35,554 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:03:35,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:03:35,556 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:03:35,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:03:35,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:03:35,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:03:35,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:03:35,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:03:35,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:03:35,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:03:35,567 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:03:35,568 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:03:35,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:03:35,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:03:35,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:03:35,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:03:35,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:03:35,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:03:35,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:03:35,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:03:35,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:03:35,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:03:35,585 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:03:35,585 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:03:35,586 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:03:35,587 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:03:35,588 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:03:35,588 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:03:35,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:03:35,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:03:35,591 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:03:35,592 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:03:35,593 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:03:35,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:03:35,594 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:03:35,594 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:03:35,595 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:03:35,596 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:03:35,597 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:03:35,620 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:03:35,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:03:35,621 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:03:35,621 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:03:35,622 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:03:35,622 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:03:35,622 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:03:35,622 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:03:35,623 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:03:35,623 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:03:35,623 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:03:35,623 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:03:35,624 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:03:35,624 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:03:35,624 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:03:35,624 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:03:35,625 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:03:35,625 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:03:35,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:03:35,626 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:03:35,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:03:35,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:03:35,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:03:35,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:03:35,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:03:35,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:03:35,628 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:03:35,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:03:35,628 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:03:35,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:03:35,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:03:35,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:03:35,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:03:35,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:03:35,629 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:03:35,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:03:35,630 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:03:35,630 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:03:35,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:03:35,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:03:35,631 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:03:35,631 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 08288106b555461ef057d9cc6ff3152dcec81ba7fba064f1bc055561de30be9f [2022-11-19 08:03:35,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:03:35,970 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:03:35,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:03:35,974 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:03:35,975 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:03:35,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_mul_init.i [2022-11-19 08:03:36,055 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/data/e8ed2bede/66c391adbf74423fb33ca39dd3d4da42/FLAG14cdf0594 [2022-11-19 08:03:36,629 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:03:36,630 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_mul_init.i [2022-11-19 08:03:36,646 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/data/e8ed2bede/66c391adbf74423fb33ca39dd3d4da42/FLAG14cdf0594 [2022-11-19 08:03:36,994 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/data/e8ed2bede/66c391adbf74423fb33ca39dd3d4da42 [2022-11-19 08:03:36,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:03:37,000 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:03:37,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:03:37,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:03:37,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:03:37,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:36" (1/1) ... [2022-11-19 08:03:37,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f3ee2bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:37, skipping insertion in model container [2022-11-19 08:03:37,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:03:36" (1/1) ... [2022-11-19 08:03:37,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:03:37,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:03:37,226 WARN L234 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_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_mul_init.i[821,834] [2022-11-19 08:03:37,244 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:03:39,307 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:03:39,322 WARN L234 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_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_mul_init.i[821,834] [2022-11-19 08:03:39,340 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:03:39,360 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:03:39,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:39 WrapperNode [2022-11-19 08:03:39,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:03:39,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:03:39,362 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:03:39,363 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:03:39,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:39" (1/1) ... [2022-11-19 08:03:39,381 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:39" (1/1) ... [2022-11-19 08:03:39,410 INFO L138 Inliner]: procedures = 16, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-11-19 08:03:39,411 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:03:39,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:03:39,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:03:39,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:03:39,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:39" (1/1) ... [2022-11-19 08:03:39,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:39" (1/1) ... [2022-11-19 08:03:39,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:39" (1/1) ... [2022-11-19 08:03:39,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:39" (1/1) ... [2022-11-19 08:03:39,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:39" (1/1) ... [2022-11-19 08:03:39,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:39" (1/1) ... [2022-11-19 08:03:39,459 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:39" (1/1) ... [2022-11-19 08:03:39,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:39" (1/1) ... [2022-11-19 08:03:39,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:03:39,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:03:39,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:03:39,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:03:39,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:39" (1/1) ... [2022-11-19 08:03:39,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:03:39,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:39,504 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:03:39,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:03:39,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:03:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:03:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:03:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:03:39,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:03:39,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:03:39,651 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:03:39,654 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:03:39,891 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:03:39,963 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:03:39,964 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-19 08:03:39,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:39 BoogieIcfgContainer [2022-11-19 08:03:39,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:03:39,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:03:39,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:03:39,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:03:39,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:03:36" (1/3) ... [2022-11-19 08:03:39,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@522f9b2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:39, skipping insertion in model container [2022-11-19 08:03:39,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:39" (2/3) ... [2022-11-19 08:03:39,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@522f9b2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:39, skipping insertion in model container [2022-11-19 08:03:39,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:39" (3/3) ... [2022-11-19 08:03:39,996 INFO L112 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_mul_init.i [2022-11-19 08:03:40,019 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:03:40,020 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:03:40,072 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:03:40,079 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@d6fc574, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:03:40,080 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:03:40,084 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:03:40,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 08:03:40,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:40,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 08:03:40,093 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:40,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:40,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1295793191, now seen corresponding path program 1 times [2022-11-19 08:03:40,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:40,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156025895] [2022-11-19 08:03:40,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:40,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:40,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:40,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:40,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156025895] [2022-11-19 08:03:40,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-19 08:03:40,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691573865] [2022-11-19 08:03:40,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:40,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:40,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:40,249 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:40,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:03:40,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:40,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:03:40,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:40,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:03:40,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691573865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:40,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:03:40,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:03:40,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158653503] [2022-11-19 08:03:40,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:40,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:03:40,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:40,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:03:40,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:03:40,450 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:03:40,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:40,524 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2022-11-19 08:03:40,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:03:40,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 08:03:40,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:40,536 INFO L225 Difference]: With dead ends: 23 [2022-11-19 08:03:40,537 INFO L226 Difference]: Without dead ends: 15 [2022-11-19 08:03:40,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:03:40,544 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:40,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:03:40,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-19 08:03:40,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2022-11-19 08:03:40,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:03:40,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-19 08:03:40,584 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2022-11-19 08:03:40,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:40,585 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-19 08:03:40,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:03:40,586 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-19 08:03:40,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:03:40,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:40,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:40,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:40,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:40,794 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:40,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:40,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1827116458, now seen corresponding path program 1 times [2022-11-19 08:03:40,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:40,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520860746] [2022-11-19 08:03:40,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:40,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:40,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:40,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:40,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520860746] [2022-11-19 08:03:40,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-19 08:03:40,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395801551] [2022-11-19 08:03:40,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:40,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:40,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:40,852 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:40,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:03:40,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:40,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:03:40,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:03:40,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:03:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:03:41,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395801551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:03:41,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1708295529] [2022-11-19 08:03:41,026 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:03:41,026 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:03:41,030 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:03:41,036 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:03:41,037 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:03:41,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-19 08:03:41,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-19 08:03:41,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:03:41,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 176 [2022-11-19 08:03:41,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2022-11-19 08:03:41,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-19 08:03:41,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-19 08:03:41,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-19 08:03:41,857 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:03:42,265 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '124#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ 2 (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem9#1|) (= (ite |ULTIMATE.start_main_#t~short11#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem6#1|) (not (= (mod |ULTIMATE.start_main_#t~mem7#1| 65536) (mod |ULTIMATE.start_main_#t~mem6#1| 65536))) (not (= (mod |ULTIMATE.start_main_#t~mem10#1| 65536) (* (mod |ULTIMATE.start_main_#t~mem8#1| 65536) (mod |ULTIMATE.start_main_#t~mem9#1| 65536)))) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ 2 (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.base| 0))' at error location [2022-11-19 08:03:42,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:03:42,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:03:42,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2022-11-19 08:03:42,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268456056] [2022-11-19 08:03:42,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:03:42,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:03:42,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:42,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:03:42,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:03:42,270 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:03:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:42,364 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-11-19 08:03:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:03:42,365 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 08:03:42,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:42,367 INFO L225 Difference]: With dead ends: 39 [2022-11-19 08:03:42,367 INFO L226 Difference]: Without dead ends: 32 [2022-11-19 08:03:42,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:03:42,370 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:42,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 12 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:03:42,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-19 08:03:42,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 16. [2022-11-19 08:03:42,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:03:42,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-11-19 08:03:42,378 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-11-19 08:03:42,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:42,378 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-11-19 08:03:42,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:03:42,379 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-11-19 08:03:42,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:03:42,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:42,380 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:42,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:42,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:42,587 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:42,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:42,588 INFO L85 PathProgramCache]: Analyzing trace with hash 259842841, now seen corresponding path program 2 times [2022-11-19 08:03:42,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:42,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763856709] [2022-11-19 08:03:42,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:42,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:42,645 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:03:42,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987941949] [2022-11-19 08:03:42,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:03:42,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:42,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:42,647 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:42,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:03:42,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:03:42,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:03:42,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:03:42,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:03:42,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:03:42,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 08:03:42,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:42,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763856709] [2022-11-19 08:03:42,941 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:03:42,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987941949] [2022-11-19 08:03:42,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987941949] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:03:42,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1404843458] [2022-11-19 08:03:42,945 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:03:42,946 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:03:42,946 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:03:42,947 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:03:42,947 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:03:42,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-19 08:03:42,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-19 08:03:43,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:03:43,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 176 [2022-11-19 08:03:43,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2022-11-19 08:03:43,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:03:43,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 25 [2022-11-19 08:03:43,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-19 08:03:43,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-19 08:03:43,360 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:03:43,771 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '302#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ 2 (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem9#1|) (= (ite |ULTIMATE.start_main_#t~short11#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem6#1|) (not (= (mod |ULTIMATE.start_main_#t~mem7#1| 65536) (mod |ULTIMATE.start_main_#t~mem6#1| 65536))) (not (= (mod |ULTIMATE.start_main_#t~mem10#1| 65536) (* (mod |ULTIMATE.start_main_#t~mem8#1| 65536) (mod |ULTIMATE.start_main_#t~mem9#1| 65536)))) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ 2 (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.base| 0))' at error location [2022-11-19 08:03:43,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:03:43,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:03:43,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-19 08:03:43,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924005869] [2022-11-19 08:03:43,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:03:43,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:03:43,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:43,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:03:43,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:03:43,774 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:03:43,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:43,940 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2022-11-19 08:03:43,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:03:43,940 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 08:03:43,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:43,941 INFO L225 Difference]: With dead ends: 84 [2022-11-19 08:03:43,942 INFO L226 Difference]: Without dead ends: 74 [2022-11-19 08:03:43,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:03:43,943 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 84 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:43,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 30 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:03:43,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-19 08:03:43,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 28. [2022-11-19 08:03:43,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:03:43,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-11-19 08:03:43,950 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2022-11-19 08:03:43,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:43,951 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-11-19 08:03:43,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:03:43,951 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-11-19 08:03:43,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:03:43,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:43,952 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:43,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:44,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:44,159 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:44,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:44,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1482864121, now seen corresponding path program 3 times [2022-11-19 08:03:44,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:44,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203405116] [2022-11-19 08:03:44,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:44,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:44,202 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:03:44,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099108124] [2022-11-19 08:03:44,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:03:44,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:44,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:44,204 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:44,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:03:44,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:03:44,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:03:44,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:03:44,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:44,447 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 08:03:44,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:03:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 08:03:44,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:44,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203405116] [2022-11-19 08:03:44,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:03:44,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099108124] [2022-11-19 08:03:44,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099108124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:03:44,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1055518441] [2022-11-19 08:03:44,697 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:03:44,697 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:03:44,697 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:03:44,698 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:03:44,698 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:03:44,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-19 08:03:44,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-11-19 08:03:44,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:03:44,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 188 [2022-11-19 08:03:44,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2022-11-19 08:03:44,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-19 08:03:44,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-19 08:03:44,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-19 08:03:45,037 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:03:45,423 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '654#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ 2 (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem9#1|) (= (ite |ULTIMATE.start_main_#t~short11#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem6#1|) (not (= (mod |ULTIMATE.start_main_#t~mem7#1| 65536) (mod |ULTIMATE.start_main_#t~mem6#1| 65536))) (not (= (mod |ULTIMATE.start_main_#t~mem10#1| 65536) (* (mod |ULTIMATE.start_main_#t~mem8#1| 65536) (mod |ULTIMATE.start_main_#t~mem9#1| 65536)))) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ 2 (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.base| 0))' at error location [2022-11-19 08:03:45,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:03:45,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:03:45,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2022-11-19 08:03:45,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737564432] [2022-11-19 08:03:45,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:03:45,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 08:03:45,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:45,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 08:03:45,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=400, Unknown=0, NotChecked=0, Total=756 [2022-11-19 08:03:45,426 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:03:45,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:45,867 INFO L93 Difference]: Finished difference Result 174 states and 201 transitions. [2022-11-19 08:03:45,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 08:03:45,868 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 08:03:45,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:45,870 INFO L225 Difference]: With dead ends: 174 [2022-11-19 08:03:45,870 INFO L226 Difference]: Without dead ends: 158 [2022-11-19 08:03:45,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=356, Invalid=400, Unknown=0, NotChecked=0, Total=756 [2022-11-19 08:03:45,872 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 228 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:45,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 66 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:03:45,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-19 08:03:45,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 52. [2022-11-19 08:03:45,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:03:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-11-19 08:03:45,881 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 26 [2022-11-19 08:03:45,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:45,881 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-11-19 08:03:45,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:03:45,885 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-11-19 08:03:45,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-19 08:03:45,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:45,886 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:45,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:46,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:46,092 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:46,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:46,093 INFO L85 PathProgramCache]: Analyzing trace with hash 498811833, now seen corresponding path program 4 times [2022-11-19 08:03:46,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:46,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636089022] [2022-11-19 08:03:46,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:46,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:46,181 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:03:46,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364477414] [2022-11-19 08:03:46,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:03:46,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:46,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:46,190 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:46,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:03:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:46,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:03:46,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-19 08:03:46,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:03:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-19 08:03:47,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:03:47,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636089022] [2022-11-19 08:03:47,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:03:47,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364477414] [2022-11-19 08:03:47,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364477414] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:03:47,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [722272389] [2022-11-19 08:03:47,849 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 08:03:47,850 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:03:47,850 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:03:47,850 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:03:47,850 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:03:47,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-19 08:03:47,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-19 08:03:47,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:03:47,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 176 [2022-11-19 08:03:47,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 29 [2022-11-19 08:03:47,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-19 08:03:48,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-19 08:03:48,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 33 [2022-11-19 08:03:48,120 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:03:50,240 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1354#(and (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ 2 (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem7#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem9#1|) (= (ite |ULTIMATE.start_main_#t~short11#1| 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem6#1|) (not (= (mod |ULTIMATE.start_main_#t~mem7#1| 65536) (mod |ULTIMATE.start_main_#t~mem6#1| 65536))) (not (= (mod |ULTIMATE.start_main_#t~mem10#1| 65536) (* (mod |ULTIMATE.start_main_#t~mem8#1| 65536) (mod |ULTIMATE.start_main_#t~mem9#1| 65536)))) (= 3 |~#a~0.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= (select (select |#memory_int| |~#a~0.base|) (+ 2 (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem10#1|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |~#a~0.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |~#a~0.offset|)) |ULTIMATE.start_main_#t~mem8#1|) (= |#NULL.base| 0))' at error location [2022-11-19 08:03:50,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:03:50,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:03:50,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2022-11-19 08:03:50,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839973445] [2022-11-19 08:03:50,241 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:03:50,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-19 08:03:50,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:03:50,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-19 08:03:50,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=1372, Unknown=0, NotChecked=0, Total=2652 [2022-11-19 08:03:50,245 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:03:51,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:51,697 INFO L93 Difference]: Finished difference Result 354 states and 405 transitions. [2022-11-19 08:03:51,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-19 08:03:51,698 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-19 08:03:51,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:51,700 INFO L225 Difference]: With dead ends: 354 [2022-11-19 08:03:51,700 INFO L226 Difference]: Without dead ends: 326 [2022-11-19 08:03:51,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 23 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1280, Invalid=1372, Unknown=0, NotChecked=0, Total=2652 [2022-11-19 08:03:51,703 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 684 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:51,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 138 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 08:03:51,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-11-19 08:03:51,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 100. [2022-11-19 08:03:51,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:03:51,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-11-19 08:03:51,721 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 50 [2022-11-19 08:03:51,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:51,722 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-11-19 08:03:51,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:03:51,722 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-11-19 08:03:51,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-19 08:03:51,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:51,725 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:51,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:51,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:51,932 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:03:51,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:51,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1309146937, now seen corresponding path program 5 times [2022-11-19 08:03:51,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:03:51,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26492477] [2022-11-19 08:03:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:51,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:03:52,118 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:03:52,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536656526] [2022-11-19 08:03:52,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:03:52,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:52,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:52,122 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:52,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a545036-65a6-4d5a-a9bd-03e9d1bdf7f2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process