./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ss3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ss3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5805614faff907ef6adf6c59906ce41481de02c5b77e55fb631cc39640689370 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:31:35,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:31:35,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:31:35,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:31:35,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:31:35,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:31:35,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:31:35,403 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:31:35,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:31:35,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:31:35,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:31:35,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:31:35,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:31:35,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:31:35,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:31:35,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:31:35,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:31:35,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:31:35,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:31:35,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:31:35,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:31:35,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:31:35,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:31:35,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:31:35,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:31:35,454 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:31:35,454 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:31:35,455 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:31:35,455 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:31:35,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:31:35,456 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:31:35,457 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:31:35,458 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:31:35,459 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:31:35,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:31:35,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:31:35,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:31:35,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:31:35,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:31:35,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:31:35,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:31:35,469 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:31:35,512 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:31:35,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:31:35,513 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:31:35,513 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:31:35,515 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:31:35,515 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:31:35,515 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:31:35,515 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:31:35,516 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:31:35,516 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:31:35,517 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:31:35,517 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:31:35,517 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:31:35,518 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:31:35,518 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:31:35,518 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:31:35,518 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:31:35,518 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:31:35,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:31:35,519 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:31:35,520 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:31:35,520 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:31:35,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:31:35,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:31:35,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:31:35,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:31:35,521 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:31:35,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:31:35,521 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:31:35,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:31:35,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:31:35,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:31:35,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:31:35,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:31:35,523 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:31:35,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:31:35,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:31:35,524 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:31:35,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:31:35,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:31:35,524 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:31:35,524 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_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5805614faff907ef6adf6c59906ce41481de02c5b77e55fb631cc39640689370 [2022-11-19 08:31:35,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:31:35,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:31:35,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:31:35,841 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:31:35,841 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:31:35,843 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-fpi/ss3.c [2022-11-19 08:31:35,908 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/data/043846313/062da035053c43f0a95e09628dd568c5/FLAG1bc16bfcc [2022-11-19 08:31:36,484 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:31:36,485 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/sv-benchmarks/c/array-fpi/ss3.c [2022-11-19 08:31:36,493 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/data/043846313/062da035053c43f0a95e09628dd568c5/FLAG1bc16bfcc [2022-11-19 08:31:36,837 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/data/043846313/062da035053c43f0a95e09628dd568c5 [2022-11-19 08:31:36,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:31:36,846 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:31:36,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:31:36,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:31:36,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:31:36,854 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:31:36" (1/1) ... [2022-11-19 08:31:36,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c2f910d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:31:36, skipping insertion in model container [2022-11-19 08:31:36,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:31:36" (1/1) ... [2022-11-19 08:31:36,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:31:36,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:31:37,068 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/sv-benchmarks/c/array-fpi/ss3.c[586,599] [2022-11-19 08:31:37,098 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:31:37,105 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:31:37,117 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/sv-benchmarks/c/array-fpi/ss3.c[586,599] [2022-11-19 08:31:37,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:31:37,146 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:31:37,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:31:37 WrapperNode [2022-11-19 08:31:37,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:31:37,147 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:31:37,147 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:31:37,148 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:31:37,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:31:37" (1/1) ... [2022-11-19 08:31:37,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:31:37" (1/1) ... [2022-11-19 08:31:37,202 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 104 [2022-11-19 08:31:37,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:31:37,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:31:37,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:31:37,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:31:37,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:31:37" (1/1) ... [2022-11-19 08:31:37,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:31:37" (1/1) ... [2022-11-19 08:31:37,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:31:37" (1/1) ... [2022-11-19 08:31:37,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:31:37" (1/1) ... [2022-11-19 08:31:37,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:31:37" (1/1) ... [2022-11-19 08:31:37,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:31:37" (1/1) ... [2022-11-19 08:31:37,245 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:31:37" (1/1) ... [2022-11-19 08:31:37,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:31:37" (1/1) ... [2022-11-19 08:31:37,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:31:37,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:31:37,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:31:37,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:31:37,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:31:37" (1/1) ... [2022-11-19 08:31:37,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:31:37,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:31:37,288 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:31:37,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:31:37,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:31:37,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:31:37,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:31:37,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:31:37,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 08:31:37,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:31:37,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:31:37,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 08:31:37,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:31:37,459 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:31:37,460 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:31:37,691 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:31:37,801 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:31:37,802 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-19 08:31:37,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:31:37 BoogieIcfgContainer [2022-11-19 08:31:37,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:31:37,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:31:37,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:31:37,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:31:37,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:31:36" (1/3) ... [2022-11-19 08:31:37,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea4371f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:31:37, skipping insertion in model container [2022-11-19 08:31:37,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:31:37" (2/3) ... [2022-11-19 08:31:37,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea4371f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:31:37, skipping insertion in model container [2022-11-19 08:31:37,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:31:37" (3/3) ... [2022-11-19 08:31:37,826 INFO L112 eAbstractionObserver]: Analyzing ICFG ss3.c [2022-11-19 08:31:37,845 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:31:37,845 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:31:37,896 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:31:37,904 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;@42aedcd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:31:37,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:31:37,908 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 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) [2022-11-19 08:31:37,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:31:37,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:37,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:31:37,920 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:31:37,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:37,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1473858574, now seen corresponding path program 1 times [2022-11-19 08:31:37,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:31:37,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638419426] [2022-11-19 08:31:37,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:37,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:31:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:38,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:31:38,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638419426] [2022-11-19 08:31:38,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-19 08:31:38,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639296833] [2022-11-19 08:31:38,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:38,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:31:38,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:31:38,225 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:31:38,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:31:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:38,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:31:38,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:31:38,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:31:38,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639296833] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:31:38,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:31:38,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:31:38,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637238240] [2022-11-19 08:31:38,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:31:38,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:31:38,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:31:38,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:31:38,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:31:38,515 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:38,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:38,605 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2022-11-19 08:31:38,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:31:38,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 [2022-11-19 08:31:38,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:38,619 INFO L225 Difference]: With dead ends: 24 [2022-11-19 08:31:38,620 INFO L226 Difference]: Without dead ends: 11 [2022-11-19 08:31:38,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:31:38,628 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:38,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:31:38,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-19 08:31:38,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-19 08:31:38,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) 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) [2022-11-19 08:31:38,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2022-11-19 08:31:38,667 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 9 [2022-11-19 08:31:38,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:38,667 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2022-11-19 08:31:38,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:38,669 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2022-11-19 08:31:38,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:31:38,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:38,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:31:38,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:31:38,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-19 08:31:38,875 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:31:38,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:38,876 INFO L85 PathProgramCache]: Analyzing trace with hash -332908202, now seen corresponding path program 1 times [2022-11-19 08:31:38,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:31:38,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793379132] [2022-11-19 08:31:38,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:38,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:31:38,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:38,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:31:38,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793379132] [2022-11-19 08:31:38,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-19 08:31:38,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705796677] [2022-11-19 08:31:38,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:38,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:31:38,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:31:38,964 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:31:38,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:31:39,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:39,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:31:39,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:31:39,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:31:39,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705796677] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:31:39,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:31:39,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:31:39,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458239067] [2022-11-19 08:31:39,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:31:39,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:31:39,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:31:39,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:31:39,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:31:39,116 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-19 08:31:39,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:39,186 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2022-11-19 08:31:39,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:31:39,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 [2022-11-19 08:31:39,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:39,188 INFO L225 Difference]: With dead ends: 21 [2022-11-19 08:31:39,189 INFO L226 Difference]: Without dead ends: 15 [2022-11-19 08:31:39,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:31:39,191 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:39,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 4 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:31:39,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-19 08:31:39,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-19 08:31:39,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 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) [2022-11-19 08:31:39,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-11-19 08:31:39,210 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 10 [2022-11-19 08:31:39,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:39,210 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-11-19 08:31:39,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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) [2022-11-19 08:31:39,212 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-11-19 08:31:39,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:31:39,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:39,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:31:39,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 08:31:39,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:31:39,422 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:31:39,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:39,423 INFO L85 PathProgramCache]: Analyzing trace with hash 852146504, now seen corresponding path program 1 times [2022-11-19 08:31:39,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:31:39,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274280620] [2022-11-19 08:31:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:39,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:31:39,496 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:31:39,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617907] [2022-11-19 08:31:39,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:39,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:31:39,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:31:39,508 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:31:39,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:31:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:39,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-19 08:31:39,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:39,670 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 [2022-11-19 08:31:39,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:31:39,768 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 19 treesize of output 18 [2022-11-19 08:31:39,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:31:40,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-19 08:31:40,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:31:40,276 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 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-19 08:31:40,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-11-19 08:31:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:31:40,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:31:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:31:41,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:31:41,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274280620] [2022-11-19 08:31:41,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:31:41,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617907] [2022-11-19 08:31:41,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:31:41,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1959829134] [2022-11-19 08:31:41,311 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 08:31:41,311 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:31:41,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:31:41,325 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:31:41,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:31:41,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:41,428 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:31:41,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-19 08:31:41,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:41,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:41,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:41,554 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-19 08:31:41,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-19 08:31:41,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:41,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:41,590 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 29 treesize of output 39 [2022-11-19 08:31:41,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:41,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:41,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-19 08:31:41,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:41,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:41,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:41,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:41,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:41,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:31:41,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:31:41,974 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-19 08:31:41,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-19 08:31:42,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:31:42,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:31:42,274 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-19 08:31:42,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:31:42,356 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:31:42,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-19 08:31:42,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:31:42,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:31:42,477 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:31:42,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-19 08:31:42,554 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-19 08:31:42,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-19 08:31:42,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:31:42,644 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-19 08:31:42,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:31:42,739 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:31:42,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-19 08:31:42,777 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:31:43,594 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '286#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem17#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-19 08:31:43,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:31:43,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:31:43,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2022-11-19 08:31:43,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519873166] [2022-11-19 08:31:43,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:31:43,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 08:31:43,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:31:43,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 08:31:43,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-11-19 08:31:43,598 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:45,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:45,488 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2022-11-19 08:31:45,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 08:31:45,489 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 08:31:45,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:45,491 INFO L225 Difference]: With dead ends: 36 [2022-11-19 08:31:45,492 INFO L226 Difference]: Without dead ends: 30 [2022-11-19 08:31:45,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-11-19 08:31:45,493 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:45,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 23 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 238 Invalid, 0 Unknown, 2 Unchecked, 0.9s Time] [2022-11-19 08:31:45,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-19 08:31:45,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2022-11-19 08:31:45,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:45,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2022-11-19 08:31:45,506 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 14 [2022-11-19 08:31:45,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:45,507 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2022-11-19 08:31:45,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:45,507 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2022-11-19 08:31:45,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 08:31:45,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:45,508 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:31:45,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-19 08:31:45,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:31:45,715 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:31:45,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:45,715 INFO L85 PathProgramCache]: Analyzing trace with hash 111466752, now seen corresponding path program 2 times [2022-11-19 08:31:45,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:31:45,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505761203] [2022-11-19 08:31:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:45,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:31:45,771 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:31:45,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776083314] [2022-11-19 08:31:45,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:31:45,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:31:45,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:31:45,777 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:31:45,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:31:45,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:31:45,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:31:45,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:31:45,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:31:45,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:31:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:31:45,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:31:45,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505761203] [2022-11-19 08:31:45,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:31:45,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776083314] [2022-11-19 08:31:45,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776083314] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:31:45,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [559319851] [2022-11-19 08:31:45,988 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 08:31:45,988 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:31:45,988 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:31:45,989 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:31:45,989 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:31:46,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:46,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:46,117 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-19 08:31:46,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-19 08:31:46,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:46,157 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:31:46,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-19 08:31:46,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:46,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:46,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:46,274 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-19 08:31:46,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-19 08:31:46,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:46,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:46,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-19 08:31:46,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:46,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:46,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:46,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:46,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:46,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:31:46,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:46,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:46,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:46,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:46,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:46,588 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-19 08:31:46,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-11-19 08:31:46,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:31:46,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:31:46,769 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-19 08:31:46,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:31:46,884 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:31:46,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-19 08:31:46,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:31:46,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:31:46,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:31:46,991 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:31:46,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-19 08:31:47,072 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-19 08:31:47,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-19 08:31:47,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:31:47,149 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-19 08:31:47,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:31:47,238 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:31:47,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-19 08:31:47,272 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:31:47,705 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '497#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem17#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-19 08:31:47,705 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:31:47,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:31:47,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-19 08:31:47,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291621718] [2022-11-19 08:31:47,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:31:47,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 08:31:47,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:31:47,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 08:31:47,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:31:47,707 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:47,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:47,924 INFO L93 Difference]: Finished difference Result 42 states and 58 transitions. [2022-11-19 08:31:47,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:31:47,925 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 15 [2022-11-19 08:31:47,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:47,925 INFO L225 Difference]: With dead ends: 42 [2022-11-19 08:31:47,925 INFO L226 Difference]: Without dead ends: 32 [2022-11-19 08:31:47,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:31:47,927 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:47,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 8 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:31:47,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-19 08:31:47,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2022-11-19 08:31:47,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:47,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-11-19 08:31:47,941 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 15 [2022-11-19 08:31:47,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:47,941 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-11-19 08:31:47,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:47,942 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-11-19 08:31:47,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 08:31:47,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:47,943 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:31:47,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:31:48,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:31:48,149 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:31:48,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:48,150 INFO L85 PathProgramCache]: Analyzing trace with hash 646375578, now seen corresponding path program 3 times [2022-11-19 08:31:48,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:31:48,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454848957] [2022-11-19 08:31:48,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:48,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:31:48,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:31:48,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351803120] [2022-11-19 08:31:48,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:31:48,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:31:48,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:31:48,215 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:31:48,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:31:48,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:31:48,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:31:48,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:31:48,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:48,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:31:48,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:31:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:31:48,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:31:48,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454848957] [2022-11-19 08:31:48,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:31:48,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351803120] [2022-11-19 08:31:48,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351803120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:31:48,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [701788122] [2022-11-19 08:31:48,412 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 08:31:48,412 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:31:48,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:31:48,413 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:31:48,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:31:48,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:48,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:48,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:48,540 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-19 08:31:48,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-19 08:31:48,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:48,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-11-19 08:31:48,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:48,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:48,591 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 29 treesize of output 39 [2022-11-19 08:31:48,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:48,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:48,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-19 08:31:48,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:48,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:48,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:48,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:48,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:48,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:31:48,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:31:48,867 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-19 08:31:48,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-19 08:31:49,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:31:49,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:31:49,181 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-19 08:31:49,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:31:49,269 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:31:49,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-19 08:31:49,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:31:49,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:31:49,417 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:31:49,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-19 08:31:49,508 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-19 08:31:49,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-19 08:31:49,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:31:49,583 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-19 08:31:49,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:31:49,678 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:31:49,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-19 08:31:49,713 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:31:50,259 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '729#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem17#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-19 08:31:50,259 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:31:50,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:31:50,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-19 08:31:50,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499990792] [2022-11-19 08:31:50,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:31:50,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 08:31:50,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:31:50,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 08:31:50,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:31:50,261 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:50,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:31:50,393 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-11-19 08:31:50,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:31:50,394 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 15 [2022-11-19 08:31:50,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:31:50,395 INFO L225 Difference]: With dead ends: 43 [2022-11-19 08:31:50,395 INFO L226 Difference]: Without dead ends: 20 [2022-11-19 08:31:50,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 10 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:31:50,397 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:31:50,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 6 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:31:50,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-19 08:31:50,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-19 08:31:50,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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) [2022-11-19 08:31:50,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-11-19 08:31:50,406 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 15 [2022-11-19 08:31:50,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:31:50,407 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-11-19 08:31:50,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:31:50,407 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-11-19 08:31:50,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 08:31:50,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:31:50,408 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:31:50,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:31:50,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:31:50,619 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:31:50,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:31:50,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1958297742, now seen corresponding path program 4 times [2022-11-19 08:31:50,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:31:50,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716364800] [2022-11-19 08:31:50,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:31:50,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:31:50,656 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:31:50,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318735321] [2022-11-19 08:31:50,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:31:50,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:31:50,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:31:50,658 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:31:50,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:31:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:31:50,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-19 08:31:50,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:31:50,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:31:50,777 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 [2022-11-19 08:31:50,799 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 24 treesize of output 23 [2022-11-19 08:31:50,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:50,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 08:31:50,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:50,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-11-19 08:31:50,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:50,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2022-11-19 08:31:51,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:51,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:31:51,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-11-19 08:31:51,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:51,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2022-11-19 08:31:51,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:31:51,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:51,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 40 [2022-11-19 08:31:51,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:51,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-11-19 08:31:51,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:31:51,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:31:51,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2022-11-19 08:31:51,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 35 [2022-11-19 08:31:51,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 34 [2022-11-19 08:31:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:31:51,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:32:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:06,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:06,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716364800] [2022-11-19 08:32:06,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:32:06,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318735321] [2022-11-19 08:32:06,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318735321] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:32:06,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [831470993] [2022-11-19 08:32:06,777 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 08:32:06,777 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:32:06,777 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:32:06,777 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:32:06,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:32:06,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:06,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:06,876 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-19 08:32:06,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-19 08:32:06,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:06,913 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:32:06,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-19 08:32:06,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:06,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:06,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:07,025 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-19 08:32:07,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-19 08:32:07,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:07,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:07,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-19 08:32:07,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:07,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:07,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:07,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:07,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:07,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:07,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:07,263 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-19 08:32:07,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-19 08:32:07,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:32:07,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:07,494 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-19 08:32:07,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:32:07,566 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:32:07,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-19 08:32:07,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:32:07,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:32:07,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:07,674 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:32:07,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-19 08:32:07,741 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-19 08:32:07,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-19 08:32:07,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:07,806 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-19 08:32:07,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:32:07,909 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:32:07,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-19 08:32:07,963 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:32:09,859 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '992#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem17#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-19 08:32:09,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:32:09,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:32:09,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-11-19 08:32:09,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070506457] [2022-11-19 08:32:09,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:32:09,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 08:32:09,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:09,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 08:32:09,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1279, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 08:32:09,863 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 34 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:16,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:16,601 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2022-11-19 08:32:16,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 08:32:16,601 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 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 19 [2022-11-19 08:32:16,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:16,602 INFO L225 Difference]: With dead ends: 44 [2022-11-19 08:32:16,602 INFO L226 Difference]: Without dead ends: 37 [2022-11-19 08:32:16,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=164, Invalid=1642, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 08:32:16,604 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:16,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 40 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 422 Invalid, 0 Unknown, 41 Unchecked, 2.2s Time] [2022-11-19 08:32:16,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-19 08:32:16,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2022-11-19 08:32:16,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:16,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-11-19 08:32:16,621 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 19 [2022-11-19 08:32:16,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:16,621 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-11-19 08:32:16,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:16,622 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-11-19 08:32:16,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 08:32:16,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:16,622 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:16,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:16,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 08:32:16,823 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:32:16,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:16,824 INFO L85 PathProgramCache]: Analyzing trace with hash 425079766, now seen corresponding path program 5 times [2022-11-19 08:32:16,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:16,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332382884] [2022-11-19 08:32:16,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:16,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:16,848 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:32:16,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362077690] [2022-11-19 08:32:16,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:32:16,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:16,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:32:16,850 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:32:16,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:32:16,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:32:16,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:32:16,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:32:17,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:32:17,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:32:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:32:17,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:17,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332382884] [2022-11-19 08:32:17,139 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:32:17,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362077690] [2022-11-19 08:32:17,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362077690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:32:17,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1942749126] [2022-11-19 08:32:17,142 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 08:32:17,142 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:32:17,143 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:32:17,143 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:32:17,143 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:32:17,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:17,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:17,241 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-19 08:32:17,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-19 08:32:17,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:17,284 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:32:17,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-19 08:32:17,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:17,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:17,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:17,384 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-19 08:32:17,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-19 08:32:17,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:17,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:17,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-19 08:32:17,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:17,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:17,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:17,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:17,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:17,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:17,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:17,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:17,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:17,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:17,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:17,639 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-19 08:32:17,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-11-19 08:32:17,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:32:17,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:17,789 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-19 08:32:17,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:32:17,870 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:32:17,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-19 08:32:17,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:32:17,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:32:17,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:17,972 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:32:17,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-19 08:32:18,056 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-19 08:32:18,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-19 08:32:18,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:18,116 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:32:18,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-19 08:32:18,204 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:32:18,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-19 08:32:18,248 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:32:18,622 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1268#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem17#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-19 08:32:18,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:32:18,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:32:18,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-19 08:32:18,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139324094] [2022-11-19 08:32:18,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:32:18,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:32:18,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:18,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:32:18,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:32:18,624 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:18,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:18,865 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2022-11-19 08:32:18,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:32:18,866 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 20 [2022-11-19 08:32:18,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:18,868 INFO L225 Difference]: With dead ends: 56 [2022-11-19 08:32:18,868 INFO L226 Difference]: Without dead ends: 43 [2022-11-19 08:32:18,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:32:18,870 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:18,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 6 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:32:18,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-19 08:32:18,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2022-11-19 08:32:18,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:18,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-11-19 08:32:18,901 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 20 [2022-11-19 08:32:18,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:18,902 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-11-19 08:32:18,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:18,902 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-11-19 08:32:18,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 08:32:18,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:18,903 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:18,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:19,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 08:32:19,109 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:32:19,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:19,110 INFO L85 PathProgramCache]: Analyzing trace with hash 577325588, now seen corresponding path program 6 times [2022-11-19 08:32:19,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:19,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541294046] [2022-11-19 08:32:19,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:19,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:19,130 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:32:19,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433009905] [2022-11-19 08:32:19,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:32:19,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:19,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:32:19,132 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:32:19,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:32:19,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:32:19,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:32:19,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:32:19,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:19,292 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:32:19,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:32:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:32:19,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:32:19,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541294046] [2022-11-19 08:32:19,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:32:19,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433009905] [2022-11-19 08:32:19,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433009905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:32:19,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [600502375] [2022-11-19 08:32:19,345 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 08:32:19,345 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:32:19,346 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:32:19,346 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:32:19,346 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:32:19,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:19,389 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:32:19,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-19 08:32:19,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:19,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:19,494 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-19 08:32:19,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-19 08:32:19,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:19,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:19,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:19,591 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-19 08:32:19,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-19 08:32:19,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:19,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:19,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-19 08:32:19,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:19,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:19,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:19,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:19,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:19,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:19,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:19,824 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-19 08:32:19,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-19 08:32:19,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:32:19,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:19,964 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-19 08:32:19,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:32:20,037 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:32:20,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-19 08:32:20,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:32:20,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:32:20,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:20,157 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:32:20,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-19 08:32:20,237 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-19 08:32:20,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-19 08:32:20,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:20,309 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-19 08:32:20,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:32:20,386 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:32:20,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-19 08:32:20,413 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:32:20,973 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1581#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem17#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-19 08:32:20,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:32:20,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:32:20,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-19 08:32:20,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097605188] [2022-11-19 08:32:20,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:32:20,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:32:20,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:32:20,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:32:20,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:32:20,975 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:21,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:32:21,159 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-11-19 08:32:21,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:32:21,160 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 20 [2022-11-19 08:32:21,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:32:21,164 INFO L225 Difference]: With dead ends: 56 [2022-11-19 08:32:21,165 INFO L226 Difference]: Without dead ends: 25 [2022-11-19 08:32:21,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 14 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-11-19 08:32:21,166 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:32:21,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 10 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:32:21,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-19 08:32:21,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-19 08:32:21,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:21,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-19 08:32:21,184 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2022-11-19 08:32:21,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:32:21,184 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-19 08:32:21,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:32:21,186 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-19 08:32:21,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:32:21,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:32:21,187 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:32:21,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:32:21,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:21,388 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:32:21,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:32:21,388 INFO L85 PathProgramCache]: Analyzing trace with hash 34973768, now seen corresponding path program 7 times [2022-11-19 08:32:21,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:32:21,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744679516] [2022-11-19 08:32:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:32:21,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:32:21,415 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:32:21,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497099170] [2022-11-19 08:32:21,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:32:21,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:32:21,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:32:21,417 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:32:21,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:32:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:32:21,557 WARN L261 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-19 08:32:21,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:32:21,571 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 [2022-11-19 08:32:21,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:32:21,599 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 19 treesize of output 18 [2022-11-19 08:32:21,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:21,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 08:32:21,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:21,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:21,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-19 08:32:21,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:21,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:21,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2022-11-19 08:32:21,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:21,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:21,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 47 [2022-11-19 08:32:21,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:21,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:21,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 51 [2022-11-19 08:32:22,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:22,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:22,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:22,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 52 [2022-11-19 08:32:22,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:22,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:22,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:22,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:22,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2022-11-19 08:32:22,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:22,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:22,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2022-11-19 08:32:22,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:22,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:22,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2022-11-19 08:32:22,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:22,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:22,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:22,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:22,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:22,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 50 [2022-11-19 08:32:22,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:22,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:22,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 47 [2022-11-19 08:32:22,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:22,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:22,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:22,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 52 [2022-11-19 08:32:22,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:22,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:32:22,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:32:22,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 55 [2022-11-19 08:32:23,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 45 [2022-11-19 08:32:23,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 39 [2022-11-19 08:32:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:32:23,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:34:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:34:15,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:34:15,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744679516] [2022-11-19 08:34:15,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:34:15,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497099170] [2022-11-19 08:34:15,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497099170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:34:15,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [631607430] [2022-11-19 08:34:15,820 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 08:34:15,821 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:34:15,822 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:34:15,822 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:34:15,822 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:34:15,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:15,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:15,929 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-19 08:34:15,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-19 08:34:15,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:15,965 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:34:15,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-19 08:34:15,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:15,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:15,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:16,094 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-19 08:34:16,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-19 08:34:16,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:16,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:16,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-19 08:34:16,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:16,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:16,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:16,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:16,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:34:16,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:16,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:16,328 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-19 08:34:16,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-19 08:34:16,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:34:16,560 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:34:16,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-19 08:34:16,630 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:34:16,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-19 08:34:16,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:34:16,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:34:16,739 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:34:16,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-19 08:34:16,812 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-19 08:34:16,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-19 08:34:16,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:34:16,879 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-19 08:34:16,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:34:16,965 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:34:16,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-19 08:34:16,987 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:34:24,356 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1922#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem17#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-19 08:34:24,356 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:34:24,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:34:24,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-11-19 08:34:24,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388205940] [2022-11-19 08:34:24,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:34:24,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-19 08:34:24,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:34:24,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-19 08:34:24,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2075, Unknown=12, NotChecked=0, Total=2256 [2022-11-19 08:34:24,359 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:34:48,821 WARN L233 SmtUtils]: Spent 8.33s on a formula simplification. DAG size of input: 93 DAG size of output: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:35:30,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:35:32,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:35:32,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:32,335 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-11-19 08:35:32,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-19 08:35:32,336 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-19 08:35:32,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:32,336 INFO L225 Difference]: With dead ends: 55 [2022-11-19 08:35:32,336 INFO L226 Difference]: Without dead ends: 47 [2022-11-19 08:35:32,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 12 SyntacticMatches, 12 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 173.5s TimeCoverageRelationStatistics Valid=218, Invalid=2628, Unknown=16, NotChecked=0, Total=2862 [2022-11-19 08:35:32,338 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:32,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 46 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 547 Invalid, 1 Unknown, 130 Unchecked, 13.1s Time] [2022-11-19 08:35:32,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-19 08:35:32,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2022-11-19 08:35:32,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:32,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-11-19 08:35:32,363 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 24 [2022-11-19 08:35:32,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:32,364 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-11-19 08:35:32,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:32,364 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-11-19 08:35:32,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:35:32,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:32,365 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:32,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:32,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-19 08:35:32,566 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:35:32,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:32,566 INFO L85 PathProgramCache]: Analyzing trace with hash 58032640, now seen corresponding path program 8 times [2022-11-19 08:35:32,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:35:32,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212522167] [2022-11-19 08:35:32,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:32,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:35:32,591 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:35:32,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453895628] [2022-11-19 08:35:32,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:35:32,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:32,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:35:32,596 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:35:32,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:35:32,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:35:32,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:35:32,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:35:32,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 08:35:32,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:32,953 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 08:35:32,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:35:32,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212522167] [2022-11-19 08:35:32,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:35:32,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453895628] [2022-11-19 08:35:32,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453895628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:32,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [883624517] [2022-11-19 08:35:32,955 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 08:35:32,955 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:35:32,956 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:35:32,956 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:35:32,956 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:35:32,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:32,996 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:35:32,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-19 08:35:33,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:33,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:33,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:33,110 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-19 08:35:33,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-19 08:35:33,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:33,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:33,131 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 29 treesize of output 39 [2022-11-19 08:35:33,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:33,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:33,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-19 08:35:33,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:33,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:33,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:33,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:33,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:33,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:35:33,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:35:33,346 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-19 08:35:33,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-19 08:35:33,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:35:33,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:35:33,555 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-19 08:35:33,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:35:33,643 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:35:33,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-19 08:35:33,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:35:33,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:35:33,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:35:33,741 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:35:33,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-19 08:35:33,811 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-19 08:35:33,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-19 08:35:33,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:35:33,871 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:35:33,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-19 08:35:33,960 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:35:33,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-19 08:35:33,990 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:35:34,624 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2271#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem17#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-19 08:35:34,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:35:34,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:35:34,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-19 08:35:34,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125986435] [2022-11-19 08:35:34,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:35:34,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:35:34,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:35:34,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:35:34,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-11-19 08:35:34,627 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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) [2022-11-19 08:35:34,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:34,991 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2022-11-19 08:35:34,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:35:34,991 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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) Word has length 25 [2022-11-19 08:35:34,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:34,992 INFO L225 Difference]: With dead ends: 70 [2022-11-19 08:35:34,992 INFO L226 Difference]: Without dead ends: 54 [2022-11-19 08:35:34,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 17 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2022-11-19 08:35:34,993 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:34,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:35:34,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-19 08:35:35,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2022-11-19 08:35:35,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:35,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-11-19 08:35:35,020 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 25 [2022-11-19 08:35:35,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:35,021 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-11-19 08:35:35,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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) [2022-11-19 08:35:35,021 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-11-19 08:35:35,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:35:35,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:35,022 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:35,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:35,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 08:35:35,223 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:35:35,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:35,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1083824538, now seen corresponding path program 9 times [2022-11-19 08:35:35,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:35:35,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218396916] [2022-11-19 08:35:35,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:35,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:35:35,250 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:35:35,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486334928] [2022-11-19 08:35:35,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:35:35,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:35,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:35:35,253 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:35:35,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 08:35:35,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:35:35,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:35:35,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:35:35,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 08:35:35,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 08:35:35,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:35:35,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218396916] [2022-11-19 08:35:35,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:35:35,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486334928] [2022-11-19 08:35:35,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486334928] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:35,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [976833271] [2022-11-19 08:35:35,619 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 08:35:35,619 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:35:35,619 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:35:35,619 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:35:35,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:35:35,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:35,662 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 08:35:35,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 92 [2022-11-19 08:35:35,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:35,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:35,762 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-19 08:35:35,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 57 [2022-11-19 08:35:35,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:35,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:35,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:35,861 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-19 08:35:35,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-19 08:35:35,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:35,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:35,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2022-11-19 08:35:36,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:36,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:36,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:36,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:36,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:36,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:35:36,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:35:36,105 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-19 08:35:36,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 20 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 415 treesize of output 411 [2022-11-19 08:35:36,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:35:36,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:35:36,235 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-19 08:35:36,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:35:36,300 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:35:36,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-19 08:35:36,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:35:36,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:35:36,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:35:36,407 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:35:36,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-19 08:35:36,478 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-19 08:35:36,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-19 08:35:36,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:35:36,541 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:35:36,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-19 08:35:36,616 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:35:36,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-19 08:35:36,656 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:35:37,403 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2665#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem17#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-19 08:35:37,403 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:35:37,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:35:37,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-19 08:35:37,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494577269] [2022-11-19 08:35:37,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:35:37,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:35:37,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:35:37,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:35:37,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-19 08:35:37,405 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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) [2022-11-19 08:35:37,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:37,656 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2022-11-19 08:35:37,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:35:37,656 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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) Word has length 25 [2022-11-19 08:35:37,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:37,657 INFO L225 Difference]: With dead ends: 69 [2022-11-19 08:35:37,657 INFO L226 Difference]: Without dead ends: 30 [2022-11-19 08:35:37,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 38 SyntacticMatches, 18 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-11-19 08:35:37,658 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:37,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 12 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:35:37,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-19 08:35:37,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-19 08:35:37,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:37,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-11-19 08:35:37,676 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 25 [2022-11-19 08:35:37,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:37,676 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-11-19 08:35:37,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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) [2022-11-19 08:35:37,676 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-11-19 08:35:37,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 08:35:37,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:37,677 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:35:37,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:37,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:37,879 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:35:37,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:37,880 INFO L85 PathProgramCache]: Analyzing trace with hash 2069382414, now seen corresponding path program 10 times [2022-11-19 08:35:37,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:35:37,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017958875] [2022-11-19 08:35:37,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:37,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:35:37,944 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:35:37,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916057971] [2022-11-19 08:35:37,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:35:37,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:37,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:35:37,948 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:35:37,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b954e251-291f-4b04-b835-292290ffce0a/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 08:35:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:38,142 WARN L261 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 143 conjunts are in the unsatisfiable core [2022-11-19 08:35:38,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:38,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:35:38,168 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 [2022-11-19 08:35:38,199 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 24 treesize of output 23 [2022-11-19 08:35:38,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-19 08:35:38,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:38,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:38,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-19 08:35:38,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:38,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:38,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:38,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2022-11-19 08:35:38,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:38,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:35:38,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:38,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:38,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 64 [2022-11-19 08:35:38,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:38,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:38,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:38,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 59 [2022-11-19 08:35:38,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:38,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:38,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:38,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:38,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:35:38,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:38,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:38,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 64 [2022-11-19 08:35:38,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:38,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:38,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:38,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 62 [2022-11-19 08:35:39,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:35:39,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 65 [2022-11-19 08:35:39,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:35:39,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 65 [2022-11-19 08:35:39,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 57 [2022-11-19 08:35:39,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 57 [2022-11-19 08:35:39,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:35:39,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 64 [2022-11-19 08:35:39,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:35:39,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 67 [2022-11-19 08:35:39,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2022-11-19 08:35:39,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:39,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 59 [2022-11-19 08:35:40,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:40,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:35:40,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:40,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:40,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 64 [2022-11-19 08:35:40,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:40,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:40,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:35:40,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:40,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 73 [2022-11-19 08:35:40,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:40,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:40,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:40,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 62 [2022-11-19 08:35:40,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2022-11-19 08:35:40,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 43 [2022-11-19 08:35:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:40,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:42:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:42:13,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:42:13,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017958875] [2022-11-19 08:42:13,294 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:42:13,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916057971] [2022-11-19 08:42:13,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916057971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:42:13,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1454420766] [2022-11-19 08:42:13,297 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 08:42:13,297 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:42:13,297 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:42:13,298 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:42:13,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:42:13,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:42:13,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:42:13,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:42:13,427 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-19 08:42:13,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2022-11-19 08:42:13,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:42:13,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:42:13,459 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 29 treesize of output 39 [2022-11-19 08:42:13,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:42:13,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 19 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 88 [2022-11-19 08:42:13,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:42:13,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:42:13,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 103 [2022-11-19 08:42:13,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:42:13,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:42:13,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:42:13,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:42:13,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:42:13,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:42:13,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:42:13,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:42:13,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:42:13,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:42:13,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:42:13,685 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-19 08:42:13,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 26 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 420 treesize of output 410 [2022-11-19 08:42:13,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:42:13,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:42:13,860 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-19 08:42:13,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-19 08:42:13,963 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:42:13,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-19 08:42:14,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:42:14,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 08:42:14,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:42:14,088 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:42:14,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-19 08:42:14,168 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-19 08:42:14,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-19 08:42:14,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:42:14,253 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-19 08:42:14,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-19 08:42:14,344 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-19 08:42:14,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-19 08:42:14,368 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:42:21,913 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3084#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ ~N~0 (* ~N~0 ~N~0))) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem17#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-19 08:42:21,913 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:42:21,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:42:21,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2022-11-19 08:42:21,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817872824] [2022-11-19 08:42:21,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:42:21,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-19 08:42:21,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:42:21,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-19 08:42:21,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=3035, Unknown=59, NotChecked=0, Total=3306 [2022-11-19 08:42:21,916 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 54 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:44:39,064 WARN L233 SmtUtils]: Spent 9.19s on a formula simplification. DAG size of input: 173 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:44:40,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:44:44,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-19 08:45:30,287 WARN L233 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 148 DAG size of output: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)