./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/eqn5f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn5f.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0 --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 d9916de8363461179d8fb51bbbca62f9fac89d50ba7961a3d354541c45153780 --- 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-e04fb08 [2022-11-16 15:52:55,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 15:52:55,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 15:52:55,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 15:52:55,363 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 15:52:55,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 15:52:55,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 15:52:55,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 15:52:55,378 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 15:52:55,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 15:52:55,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 15:52:55,387 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 15:52:55,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 15:52:55,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 15:52:55,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 15:52:55,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 15:52:55,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 15:52:55,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 15:52:55,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 15:52:55,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 15:52:55,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 15:52:55,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 15:52:55,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 15:52:55,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 15:52:55,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 15:52:55,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 15:52:55,423 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 15:52:55,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 15:52:55,425 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 15:52:55,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 15:52:55,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 15:52:55,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 15:52:55,429 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 15:52:55,430 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 15:52:55,434 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 15:52:55,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 15:52:55,435 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 15:52:55,435 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 15:52:55,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 15:52:55,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 15:52:55,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 15:52:55,438 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 15:52:55,480 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 15:52:55,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 15:52:55,481 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 15:52:55,481 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 15:52:55,482 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 15:52:55,482 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 15:52:55,483 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 15:52:55,483 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 15:52:55,483 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 15:52:55,483 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 15:52:55,485 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 15:52:55,485 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 15:52:55,485 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 15:52:55,485 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 15:52:55,486 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 15:52:55,486 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 15:52:55,486 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 15:52:55,487 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 15:52:55,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 15:52:55,488 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 15:52:55,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 15:52:55,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 15:52:55,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 15:52:55,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 15:52:55,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 15:52:55,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 15:52:55,489 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 15:52:55,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 15:52:55,490 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 15:52:55,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 15:52:55,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 15:52:55,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 15:52:55,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 15:52:55,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 15:52:55,492 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 15:52:55,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 15:52:55,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 15:52:55,493 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 15:52:55,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 15:52:55,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 15:52:55,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 15:52:55,494 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_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9916de8363461179d8fb51bbbca62f9fac89d50ba7961a3d354541c45153780 [2022-11-16 15:52:55,852 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 15:52:55,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 15:52:55,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 15:52:55,879 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 15:52:55,880 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 15:52:55,882 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-fpi/eqn5f.c [2022-11-16 15:52:55,958 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/data/6332d113a/663bd5d507f544ceab36ccc1e7730223/FLAG99fcfacb8 [2022-11-16 15:52:56,458 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 15:52:56,459 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/sv-benchmarks/c/array-fpi/eqn5f.c [2022-11-16 15:52:56,476 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/data/6332d113a/663bd5d507f544ceab36ccc1e7730223/FLAG99fcfacb8 [2022-11-16 15:52:56,833 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/data/6332d113a/663bd5d507f544ceab36ccc1e7730223 [2022-11-16 15:52:56,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 15:52:56,838 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 15:52:56,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 15:52:56,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 15:52:56,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 15:52:56,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 03:52:56" (1/1) ... [2022-11-16 15:52:56,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e603cee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:56, skipping insertion in model container [2022-11-16 15:52:56,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 03:52:56" (1/1) ... [2022-11-16 15:52:56,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 15:52:56,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 15:52:57,090 WARN L229 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_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/sv-benchmarks/c/array-fpi/eqn5f.c[588,601] [2022-11-16 15:52:57,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 15:52:57,131 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 15:52:57,145 WARN L229 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_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/sv-benchmarks/c/array-fpi/eqn5f.c[588,601] [2022-11-16 15:52:57,152 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 15:52:57,165 INFO L208 MainTranslator]: Completed translation [2022-11-16 15:52:57,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:57 WrapperNode [2022-11-16 15:52:57,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 15:52:57,167 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 15:52:57,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 15:52:57,167 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 15:52:57,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:57" (1/1) ... [2022-11-16 15:52:57,197 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:57" (1/1) ... [2022-11-16 15:52:57,223 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2022-11-16 15:52:57,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 15:52:57,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 15:52:57,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 15:52:57,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 15:52:57,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:57" (1/1) ... [2022-11-16 15:52:57,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:57" (1/1) ... [2022-11-16 15:52:57,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:57" (1/1) ... [2022-11-16 15:52:57,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:57" (1/1) ... [2022-11-16 15:52:57,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:57" (1/1) ... [2022-11-16 15:52:57,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:57" (1/1) ... [2022-11-16 15:52:57,246 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:57" (1/1) ... [2022-11-16 15:52:57,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:57" (1/1) ... [2022-11-16 15:52:57,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 15:52:57,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 15:52:57,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 15:52:57,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 15:52:57,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:57" (1/1) ... [2022-11-16 15:52:57,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 15:52:57,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:52:57,284 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 15:52:57,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 15:52:57,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 15:52:57,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 15:52:57,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 15:52:57,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 15:52:57,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 15:52:57,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 15:52:57,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 15:52:57,419 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 15:52:57,423 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 15:52:57,669 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 15:52:57,728 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 15:52:57,734 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 15:52:57,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 03:52:57 BoogieIcfgContainer [2022-11-16 15:52:57,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 15:52:57,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 15:52:57,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 15:52:57,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 15:52:57,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 03:52:56" (1/3) ... [2022-11-16 15:52:57,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2ee247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 03:52:57, skipping insertion in model container [2022-11-16 15:52:57,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:57" (2/3) ... [2022-11-16 15:52:57,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f2ee247 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 03:52:57, skipping insertion in model container [2022-11-16 15:52:57,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 03:52:57" (3/3) ... [2022-11-16 15:52:57,752 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn5f.c [2022-11-16 15:52:57,771 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 15:52:57,772 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 15:52:57,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 15:52:57,861 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;@312cf2a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 15:52:57,861 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 15:52:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:57,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 15:52:57,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:52:57,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:52:57,877 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:52:57,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:52:57,886 INFO L85 PathProgramCache]: Analyzing trace with hash -794748304, now seen corresponding path program 1 times [2022-11-16 15:52:57,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:52:57,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043506010] [2022-11-16 15:52:57,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:57,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:52:58,062 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 15:52:58,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [846779613] [2022-11-16 15:52:58,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:58,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:52:58,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:52:58,070 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:52:58,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 15:52:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:52:58,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 15:52:58,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:52:58,404 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 15:52:58,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 15:52:58,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 15:52:58,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 15:52:58,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 15:52:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:58,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 15:52:58,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:52:58,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043506010] [2022-11-16 15:52:58,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 15:52:58,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846779613] [2022-11-16 15:52:58,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846779613] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:52:58,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:52:58,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 15:52:58,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298409685] [2022-11-16 15:52:58,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:52:58,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 15:52:58,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:52:58,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 15:52:58,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 15:52:58,748 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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) [2022-11-16 15:52:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:52:58,872 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-11-16 15:52:58,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 15:52:58,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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 7 [2022-11-16 15:52:58,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:52:58,883 INFO L225 Difference]: With dead ends: 35 [2022-11-16 15:52:58,883 INFO L226 Difference]: Without dead ends: 20 [2022-11-16 15:52:58,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 15:52:58,888 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:52:58,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 19 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:52:58,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-16 15:52:58,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 13. [2022-11-16 15:52:58,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 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) [2022-11-16 15:52:58,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2022-11-16 15:52:58,923 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 7 [2022-11-16 15:52:58,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:52:58,924 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2022-11-16 15:52:58,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 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) [2022-11-16 15:52:58,924 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2022-11-16 15:52:58,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 15:52:58,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:52:58,925 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:52:58,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 15:52:59,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-16 15:52:59,131 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:52:59,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:52:59,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1127926275, now seen corresponding path program 1 times [2022-11-16 15:52:59,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:52:59,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177574080] [2022-11-16 15:52:59,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:59,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:52:59,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 15:52:59,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390843491] [2022-11-16 15:52:59,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:59,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:52:59,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:52:59,180 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:52:59,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 15:52:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:52:59,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 15:52:59,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:52:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:59,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 15:52:59,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:52:59,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177574080] [2022-11-16 15:52:59,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 15:52:59,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390843491] [2022-11-16 15:52:59,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390843491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:52:59,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:52:59,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 15:52:59,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175997500] [2022-11-16 15:52:59,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:52:59,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 15:52:59,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:52:59,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 15:52:59,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 15:52:59,269 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:59,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:52:59,310 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2022-11-16 15:52:59,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 15:52:59,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 15:52:59,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:52:59,311 INFO L225 Difference]: With dead ends: 25 [2022-11-16 15:52:59,312 INFO L226 Difference]: Without dead ends: 19 [2022-11-16 15:52:59,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 15:52:59,313 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 15:52:59,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 15:52:59,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-16 15:52:59,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2022-11-16 15:52:59,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:59,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-16 15:52:59,318 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2022-11-16 15:52:59,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:52:59,319 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-16 15:52:59,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:59,319 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-16 15:52:59,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 15:52:59,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:52:59,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:52:59,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 15:52:59,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:52:59,531 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:52:59,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:52:59,532 INFO L85 PathProgramCache]: Analyzing trace with hash 849022933, now seen corresponding path program 1 times [2022-11-16 15:52:59,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:52:59,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443169023] [2022-11-16 15:52:59,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:59,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:52:59,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 15:52:59,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697805345] [2022-11-16 15:52:59,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:59,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:52:59,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:52:59,563 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:52:59,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 15:52:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:52:59,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 15:52:59,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:52:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:59,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:52:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:59,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:52:59,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443169023] [2022-11-16 15:52:59,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 15:52:59,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697805345] [2022-11-16 15:52:59,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697805345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:52:59,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1080043845] [2022-11-16 15:52:59,741 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 15:52:59,741 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:52:59,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:52:59,749 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:52:59,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:52:59,948 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 15:52:59,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 15:52:59,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 37 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 115 [2022-11-16 15:53:00,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-16 15:53:00,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 38 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 132 [2022-11-16 15:53:00,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:00,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:00,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:00,514 INFO L321 Elim1Store]: treesize reduction 134, result has 6.9 percent of original size [2022-11-16 15:53:00,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 52 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 47 case distinctions, treesize of input 494 treesize of output 485 [2022-11-16 15:53:00,739 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 27 treesize of output 27 [2022-11-16 15:53:00,765 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:53:01,145 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '238#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 5 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) (* 5 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (<= ~N~0 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 15:53:01,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:53:01,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:53:01,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-11-16 15:53:01,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048756423] [2022-11-16 15:53:01,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:53:01,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 15:53:01,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:53:01,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 15:53:01,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-16 15:53:01,148 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:01,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:53:01,233 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-11-16 15:53:01,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 15:53:01,234 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 15:53:01,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:53:01,234 INFO L225 Difference]: With dead ends: 29 [2022-11-16 15:53:01,234 INFO L226 Difference]: Without dead ends: 24 [2022-11-16 15:53:01,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-16 15:53:01,236 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 15:53:01,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 18 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 15:53:01,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-16 15:53:01,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2022-11-16 15:53:01,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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) [2022-11-16 15:53:01,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-11-16 15:53:01,240 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2022-11-16 15:53:01,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:53:01,241 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-11-16 15:53:01,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:01,241 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-11-16 15:53:01,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 15:53:01,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:53:01,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:53:01,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 15:53:01,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:01,443 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:53:01,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:53:01,444 INFO L85 PathProgramCache]: Analyzing trace with hash 545227070, now seen corresponding path program 1 times [2022-11-16 15:53:01,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:53:01,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686614097] [2022-11-16 15:53:01,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:01,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:53:01,479 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 15:53:01,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717510100] [2022-11-16 15:53:01,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:01,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:01,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:53:01,487 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:53:01,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 15:53:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:01,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 15:53:01,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:53:01,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 15:53:01,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,596 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 14 treesize of output 14 [2022-11-16 15:53:01,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 15:53:01,628 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 14 treesize of output 16 [2022-11-16 15:53:01,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,663 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 21 treesize of output 20 [2022-11-16 15:53:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:53:01,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:53:01,784 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_114 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_114) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) is different from false [2022-11-16 15:53:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-16 15:53:01,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:53:01,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686614097] [2022-11-16 15:53:01,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 15:53:01,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717510100] [2022-11-16 15:53:01,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717510100] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:53:01,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1298735498] [2022-11-16 15:53:01,797 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 15:53:01,798 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:53:01,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:53:01,798 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:53:01,798 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:53:01,980 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 15:53:01,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 15:53:01,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-16 15:53:02,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 37 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 115 [2022-11-16 15:53:02,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:02,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 38 disjoint index pairs (out of 78 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 140 [2022-11-16 15:53:02,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:02,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:02,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,330 INFO L321 Elim1Store]: treesize reduction 160, result has 0.6 percent of original size [2022-11-16 15:53:02,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 53 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 46 case distinctions, treesize of input 513 treesize of output 489 [2022-11-16 15:53:02,459 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 27 treesize of output 27 [2022-11-16 15:53:02,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:02,534 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:53:02,535 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 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 15:53:02,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:02,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:02,567 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:53:02,567 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 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 15:53:02,584 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:53:02,991 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '370#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 5 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) (* 5 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 15:53:02,991 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:53:02,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:53:02,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-16 15:53:02,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670226290] [2022-11-16 15:53:02,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:53:02,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 15:53:02,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:53:02,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 15:53:02,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=198, Unknown=1, NotChecked=28, Total=272 [2022-11-16 15:53:02,993 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:03,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:53:03,189 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-11-16 15:53:03,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 15:53:03,190 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 15:53:03,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:53:03,191 INFO L225 Difference]: With dead ends: 33 [2022-11-16 15:53:03,191 INFO L226 Difference]: Without dead ends: 31 [2022-11-16 15:53:03,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=339, Unknown=1, NotChecked=38, Total=462 [2022-11-16 15:53:03,192 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:53:03,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 29 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-11-16 15:53:03,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-16 15:53:03,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 17. [2022-11-16 15:53:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-11-16 15:53:03,197 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2022-11-16 15:53:03,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:53:03,198 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-11-16 15:53:03,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:03,198 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-11-16 15:53:03,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 15:53:03,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:53:03,199 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:53:03,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 15:53:03,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:03,400 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:53:03,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:53:03,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1813092602, now seen corresponding path program 1 times [2022-11-16 15:53:03,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:53:03,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916261914] [2022-11-16 15:53:03,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:03,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:53:03,420 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 15:53:03,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979134029] [2022-11-16 15:53:03,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:03,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:03,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:53:03,422 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:53:03,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 15:53:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:03,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 15:53:03,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:53:03,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:53:03,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 15:53:03,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:53:03,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916261914] [2022-11-16 15:53:03,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 15:53:03,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979134029] [2022-11-16 15:53:03,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979134029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:53:03,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:53:03,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 15:53:03,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188964603] [2022-11-16 15:53:03,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:53:03,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 15:53:03,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:53:03,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 15:53:03,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 15:53:03,546 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:03,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:53:03,611 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-11-16 15:53:03,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 15:53:03,612 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 15:53:03,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:53:03,612 INFO L225 Difference]: With dead ends: 31 [2022-11-16 15:53:03,613 INFO L226 Difference]: Without dead ends: 21 [2022-11-16 15:53:03,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 15:53:03,614 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 15:53:03,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 15:53:03,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-16 15:53:03,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2022-11-16 15:53:03,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:03,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-16 15:53:03,619 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2022-11-16 15:53:03,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:53:03,619 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-16 15:53:03,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:03,620 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-16 15:53:03,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 15:53:03,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:53:03,620 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:53:03,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-16 15:53:03,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:03,826 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:53:03,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:53:03,826 INFO L85 PathProgramCache]: Analyzing trace with hash -282510091, now seen corresponding path program 2 times [2022-11-16 15:53:03,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:53:03,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139890189] [2022-11-16 15:53:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:03,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:53:03,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 15:53:03,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320191563] [2022-11-16 15:53:03,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 15:53:03,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:03,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:53:03,863 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:53:03,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 15:53:03,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 15:53:03,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 15:53:03,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 15:53:03,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:53:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:53:03,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:53:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:53:04,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:53:04,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139890189] [2022-11-16 15:53:04,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 15:53:04,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320191563] [2022-11-16 15:53:04,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320191563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:53:04,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [338267976] [2022-11-16 15:53:04,022 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 15:53:04,022 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:53:04,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:53:04,023 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:53:04,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:53:04,160 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 15:53:04,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 15:53:04,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-16 15:53:04,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 37 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 115 [2022-11-16 15:53:04,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 38 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 132 [2022-11-16 15:53:04,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:04,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:04,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,501 INFO L321 Elim1Store]: treesize reduction 129, result has 10.4 percent of original size [2022-11-16 15:53:04,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 52 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 47 case distinctions, treesize of input 500 treesize of output 492 [2022-11-16 15:53:04,622 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 27 treesize of output 27 [2022-11-16 15:53:04,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,640 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:53:04,641 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 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-16 15:53:04,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:04,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:04,707 INFO L321 Elim1Store]: treesize reduction 124, result has 7.5 percent of original size [2022-11-16 15:53:04,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 92 treesize of output 104 [2022-11-16 15:53:04,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:04,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:04,750 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:53:04,751 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 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 15:53:04,770 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:53:05,170 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '628#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 5 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) (* 5 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 15:53:05,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:53:05,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:53:05,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-11-16 15:53:05,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696450426] [2022-11-16 15:53:05,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:53:05,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 15:53:05,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:53:05,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 15:53:05,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-16 15:53:05,172 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:05,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:53:05,264 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-11-16 15:53:05,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 15:53:05,265 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 15:53:05,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:53:05,266 INFO L225 Difference]: With dead ends: 33 [2022-11-16 15:53:05,266 INFO L226 Difference]: Without dead ends: 27 [2022-11-16 15:53:05,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-16 15:53:05,267 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:53:05,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 21 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:53:05,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-16 15:53:05,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2022-11-16 15:53:05,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:05,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-16 15:53:05,271 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2022-11-16 15:53:05,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:53:05,271 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-16 15:53:05,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:05,271 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-16 15:53:05,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 15:53:05,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:53:05,272 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:53:05,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 15:53:05,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 15:53:05,480 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:53:05,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:53:05,481 INFO L85 PathProgramCache]: Analyzing trace with hash -338579101, now seen corresponding path program 3 times [2022-11-16 15:53:05,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:53:05,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064888481] [2022-11-16 15:53:05,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:05,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:53:05,503 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 15:53:05,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549600783] [2022-11-16 15:53:05,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 15:53:05,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:05,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:53:05,505 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:53:05,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 15:53:05,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 15:53:05,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 15:53:05,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 15:53:05,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:53:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:53:05,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:53:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:53:05,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:53:05,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064888481] [2022-11-16 15:53:05,680 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 15:53:05,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549600783] [2022-11-16 15:53:05,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549600783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:53:05,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1174225290] [2022-11-16 15:53:05,682 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 15:53:05,683 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:53:05,683 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:53:05,683 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:53:05,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:53:05,804 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 15:53:05,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 15:53:05,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 37 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 115 [2022-11-16 15:53:05,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-16 15:53:05,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:05,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 38 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 132 [2022-11-16 15:53:06,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:06,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:06,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,093 INFO L321 Elim1Store]: treesize reduction 134, result has 6.9 percent of original size [2022-11-16 15:53:06,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 52 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 47 case distinctions, treesize of input 494 treesize of output 485 [2022-11-16 15:53:06,249 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 27 treesize of output 27 [2022-11-16 15:53:06,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:06,273 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:53:06,276 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 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 15:53:06,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:06,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:06,313 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-16 15:53:06,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 101 [2022-11-16 15:53:06,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:06,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:06,356 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:53:06,356 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 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 15:53:06,410 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:53:06,825 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '772#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 5 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) (* 5 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 15:53:06,825 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:53:06,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:53:06,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-16 15:53:06,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354652334] [2022-11-16 15:53:06,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:53:06,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 15:53:06,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:53:06,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 15:53:06,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-16 15:53:06,827 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:06,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:53:06,940 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-11-16 15:53:06,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 15:53:06,940 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 15:53:06,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:53:06,940 INFO L225 Difference]: With dead ends: 37 [2022-11-16 15:53:06,940 INFO L226 Difference]: Without dead ends: 32 [2022-11-16 15:53:06,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-16 15:53:06,941 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:53:06,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 25 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:53:06,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-16 15:53:06,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 17. [2022-11-16 15:53:06,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:06,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-16 15:53:06,947 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2022-11-16 15:53:06,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:53:06,947 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-16 15:53:06,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:06,947 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-16 15:53:06,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 15:53:06,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:53:06,948 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:53:06,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 15:53:07,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 15:53:07,149 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:53:07,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:53:07,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1910697616, now seen corresponding path program 4 times [2022-11-16 15:53:07,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:53:07,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015943925] [2022-11-16 15:53:07,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:07,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:53:07,183 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 15:53:07,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691503768] [2022-11-16 15:53:07,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 15:53:07,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:07,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:53:07,193 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:53:07,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 15:53:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:07,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 15:53:07,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:53:07,325 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 15:53:07,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 15:53:07,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 15:53:07,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 15:53:07,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:07,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-11-16 15:53:07,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 15:53:07,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 15:53:07,446 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 14 treesize of output 16 [2022-11-16 15:53:07,461 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 14 treesize of output 16 [2022-11-16 15:53:07,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:07,519 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 21 treesize of output 20 [2022-11-16 15:53:07,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:07,548 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 23 treesize of output 22 [2022-11-16 15:53:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:53:07,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:53:07,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:53:07,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:53:07,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015943925] [2022-11-16 15:53:07,805 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 15:53:07,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691503768] [2022-11-16 15:53:07,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691503768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:53:07,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [198765856] [2022-11-16 15:53:07,807 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 15:53:07,807 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:53:07,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:53:07,808 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:53:07,808 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:53:07,967 INFO L321 Elim1Store]: treesize reduction 70, result has 34.0 percent of original size [2022-11-16 15:53:07,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 129 [2022-11-16 15:53:08,109 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-16 15:53:08,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-11-16 15:53:08,262 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 15:53:08,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 15:53:08,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:08,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 38 disjoint index pairs (out of 78 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 140 [2022-11-16 15:53:08,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:08,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:08,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,531 INFO L321 Elim1Store]: treesize reduction 160, result has 0.6 percent of original size [2022-11-16 15:53:08,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 53 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 46 case distinctions, treesize of input 513 treesize of output 489 [2022-11-16 15:53:08,648 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 27 treesize of output 27 [2022-11-16 15:53:08,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,665 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:53:08,665 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 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-16 15:53:08,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:08,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:08,724 INFO L321 Elim1Store]: treesize reduction 124, result has 7.5 percent of original size [2022-11-16 15:53:08,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 92 treesize of output 104 [2022-11-16 15:53:08,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:08,766 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:53:08,767 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 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 15:53:08,781 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:53:09,103 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '937#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (+ (* 5 (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|)) (* 5 |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0)) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 15:53:09,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:53:09,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 15:53:09,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-16 15:53:09,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585995436] [2022-11-16 15:53:09,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 15:53:09,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 15:53:09,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:53:09,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 15:53:09,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=282, Unknown=2, NotChecked=0, Total=342 [2022-11-16 15:53:09,105 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:09,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:53:09,402 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-11-16 15:53:09,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 15:53:09,404 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 15:53:09,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:53:09,404 INFO L225 Difference]: With dead ends: 44 [2022-11-16 15:53:09,404 INFO L226 Difference]: Without dead ends: 42 [2022-11-16 15:53:09,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=666, Unknown=2, NotChecked=0, Total=812 [2022-11-16 15:53:09,406 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 60 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:53:09,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 45 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 68 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-11-16 15:53:09,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-16 15:53:09,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 19. [2022-11-16 15:53:09,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:09,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-11-16 15:53:09,412 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 11 [2022-11-16 15:53:09,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:53:09,412 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-11-16 15:53:09,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:09,413 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-11-16 15:53:09,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 15:53:09,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:53:09,413 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:53:09,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 15:53:09,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:09,627 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:53:09,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:53:09,628 INFO L85 PathProgramCache]: Analyzing trace with hash -701556884, now seen corresponding path program 1 times [2022-11-16 15:53:09,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:53:09,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227299899] [2022-11-16 15:53:09,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:09,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:53:09,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 15:53:09,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1093676979] [2022-11-16 15:53:09,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:09,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:09,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:53:09,673 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:53:09,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 15:53:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 15:53:09,754 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 15:53:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 15:53:09,790 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-16 15:53:09,790 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 15:53:09,791 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-16 15:53:09,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 15:53:09,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:09,996 INFO L444 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1] [2022-11-16 15:53:09,998 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 15:53:10,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 03:53:10 BoogieIcfgContainer [2022-11-16 15:53:10,020 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 15:53:10,021 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 15:53:10,021 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 15:53:10,021 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 15:53:10,021 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 03:52:57" (3/4) ... [2022-11-16 15:53:10,023 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-16 15:53:10,060 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74430fe1-be44-4ae9-9dc3-bd1bfe575bc3/bin/utaipan-Xvt2sAort0/witness.graphml [2022-11-16 15:53:10,060 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 15:53:10,061 INFO L158 Benchmark]: Toolchain (without parser) took 13223.35ms. Allocated memory was 134.2MB in the beginning and 274.7MB in the end (delta: 140.5MB). Free memory was 94.7MB in the beginning and 138.9MB in the end (delta: -44.2MB). Peak memory consumption was 96.4MB. Max. memory is 16.1GB. [2022-11-16 15:53:10,061 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 134.2MB. Free memory is still 111.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 15:53:10,061 INFO L158 Benchmark]: CACSL2BoogieTranslator took 326.78ms. Allocated memory is still 134.2MB. Free memory was 94.6MB in the beginning and 108.4MB in the end (delta: -13.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 15:53:10,062 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.16ms. Allocated memory is still 134.2MB. Free memory was 108.4MB in the beginning and 107.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 15:53:10,062 INFO L158 Benchmark]: Boogie Preprocessor took 25.98ms. Allocated memory is still 134.2MB. Free memory was 107.0MB in the beginning and 105.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 15:53:10,062 INFO L158 Benchmark]: RCFGBuilder took 487.50ms. Allocated memory is still 134.2MB. Free memory was 105.1MB in the beginning and 90.5MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-16 15:53:10,063 INFO L158 Benchmark]: TraceAbstraction took 12279.26ms. Allocated memory was 134.2MB in the beginning and 274.7MB in the end (delta: 140.5MB). Free memory was 89.6MB in the beginning and 141.0MB in the end (delta: -51.4MB). Peak memory consumption was 90.7MB. Max. memory is 16.1GB. [2022-11-16 15:53:10,063 INFO L158 Benchmark]: Witness Printer took 39.81ms. Allocated memory is still 274.7MB. Free memory was 141.0MB in the beginning and 138.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 15:53:10,064 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 134.2MB. Free memory is still 111.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 326.78ms. Allocated memory is still 134.2MB. Free memory was 94.6MB in the beginning and 108.4MB in the end (delta: -13.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.16ms. Allocated memory is still 134.2MB. Free memory was 108.4MB in the beginning and 107.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 25.98ms. Allocated memory is still 134.2MB. Free memory was 107.0MB in the beginning and 105.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 487.50ms. Allocated memory is still 134.2MB. Free memory was 105.1MB in the beginning and 90.5MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 12279.26ms. Allocated memory was 134.2MB in the beginning and 274.7MB in the end (delta: 140.5MB). Free memory was 89.6MB in the beginning and 141.0MB in the end (delta: -51.4MB). Peak memory consumption was 90.7MB. Max. memory is 16.1GB. * Witness Printer took 39.81ms. Allocated memory is still 274.7MB. Free memory was 141.0MB in the beginning and 138.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 1 [L32] b[0] = 1 [L33] i=1 VAL [a={-2:0}, b={-1:0}, i=1, N=2] [L33] COND TRUE i