./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ss2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ss2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW --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 e3a2069d11be89fa2c8e98300820eccf9d61bcc6c7ca5fd30afcaf42942b8548 --- 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-4e7fbc6 [2022-11-23 16:12:43,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 16:12:43,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 16:12:43,298 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 16:12:43,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 16:12:43,300 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 16:12:43,301 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 16:12:43,303 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 16:12:43,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 16:12:43,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 16:12:43,317 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 16:12:43,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 16:12:43,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 16:12:43,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 16:12:43,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 16:12:43,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 16:12:43,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 16:12:43,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 16:12:43,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 16:12:43,340 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 16:12:43,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 16:12:43,344 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 16:12:43,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 16:12:43,348 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 16:12:43,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 16:12:43,358 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 16:12:43,358 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 16:12:43,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 16:12:43,360 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 16:12:43,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 16:12:43,361 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 16:12:43,363 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 16:12:43,365 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 16:12:43,366 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 16:12:43,367 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 16:12:43,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 16:12:43,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 16:12:43,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 16:12:43,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 16:12:43,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 16:12:43,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 16:12:43,372 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 16:12:43,415 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 16:12:43,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 16:12:43,416 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 16:12:43,416 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 16:12:43,417 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 16:12:43,417 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 16:12:43,417 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 16:12:43,418 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 16:12:43,418 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 16:12:43,418 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 16:12:43,419 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 16:12:43,419 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 16:12:43,419 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 16:12:43,420 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 16:12:43,420 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 16:12:43,420 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 16:12:43,420 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 16:12:43,420 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 16:12:43,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 16:12:43,422 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 16:12:43,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 16:12:43,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 16:12:43,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 16:12:43,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 16:12:43,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 16:12:43,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 16:12:43,424 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 16:12:43,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 16:12:43,424 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 16:12:43,424 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 16:12:43,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 16:12:43,425 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 16:12:43,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:12:43,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 16:12:43,425 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 16:12:43,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 16:12:43,426 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 16:12:43,426 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 16:12:43,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 16:12:43,426 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 16:12:43,426 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 16:12:43,427 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_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3a2069d11be89fa2c8e98300820eccf9d61bcc6c7ca5fd30afcaf42942b8548 [2022-11-23 16:12:43,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 16:12:43,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 16:12:43,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 16:12:43,793 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 16:12:43,794 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 16:12:43,795 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-fpi/ss2.c [2022-11-23 16:12:46,882 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 16:12:47,075 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 16:12:47,076 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/sv-benchmarks/c/array-fpi/ss2.c [2022-11-23 16:12:47,082 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/data/484f25124/c68a591d8c6b4db59b6634d66742775b/FLAG71aa8204f [2022-11-23 16:12:47,097 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/data/484f25124/c68a591d8c6b4db59b6634d66742775b [2022-11-23 16:12:47,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 16:12:47,101 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 16:12:47,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 16:12:47,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 16:12:47,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 16:12:47,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:12:47" (1/1) ... [2022-11-23 16:12:47,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@534d5a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:47, skipping insertion in model container [2022-11-23 16:12:47,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:12:47" (1/1) ... [2022-11-23 16:12:47,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 16:12:47,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 16:12:47,303 WARN L237 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_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/sv-benchmarks/c/array-fpi/ss2.c[586,599] [2022-11-23 16:12:47,326 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:12:47,335 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 16:12:47,348 WARN L237 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_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/sv-benchmarks/c/array-fpi/ss2.c[586,599] [2022-11-23 16:12:47,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:12:47,374 INFO L208 MainTranslator]: Completed translation [2022-11-23 16:12:47,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:47 WrapperNode [2022-11-23 16:12:47,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 16:12:47,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 16:12:47,376 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 16:12:47,376 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 16:12:47,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:47" (1/1) ... [2022-11-23 16:12:47,405 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:47" (1/1) ... [2022-11-23 16:12:47,429 INFO L138 Inliner]: procedures = 17, calls = 35, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2022-11-23 16:12:47,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 16:12:47,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 16:12:47,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 16:12:47,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 16:12:47,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:47" (1/1) ... [2022-11-23 16:12:47,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:47" (1/1) ... [2022-11-23 16:12:47,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:47" (1/1) ... [2022-11-23 16:12:47,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:47" (1/1) ... [2022-11-23 16:12:47,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:47" (1/1) ... [2022-11-23 16:12:47,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:47" (1/1) ... [2022-11-23 16:12:47,459 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:47" (1/1) ... [2022-11-23 16:12:47,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:47" (1/1) ... [2022-11-23 16:12:47,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 16:12:47,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 16:12:47,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 16:12:47,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 16:12:47,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:47" (1/1) ... [2022-11-23 16:12:47,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:12:47,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:12:47,502 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 16:12:47,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 16:12:47,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 16:12:47,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 16:12:47,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 16:12:47,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 16:12:47,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 16:12:47,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 16:12:47,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 16:12:47,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 16:12:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 16:12:47,623 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 16:12:47,625 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 16:12:47,820 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 16:12:47,879 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 16:12:47,879 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-11-23 16:12:47,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:12:47 BoogieIcfgContainer [2022-11-23 16:12:47,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 16:12:47,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 16:12:47,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 16:12:47,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 16:12:47,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:12:47" (1/3) ... [2022-11-23 16:12:47,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6783ae18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:12:47, skipping insertion in model container [2022-11-23 16:12:47,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:47" (2/3) ... [2022-11-23 16:12:47,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6783ae18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:12:47, skipping insertion in model container [2022-11-23 16:12:47,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:12:47" (3/3) ... [2022-11-23 16:12:47,898 INFO L112 eAbstractionObserver]: Analyzing ICFG ss2.c [2022-11-23 16:12:47,944 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 16:12:47,944 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 16:12:48,015 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 16:12:48,033 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;@6742d4d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 16:12:48,035 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 16:12:48,039 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:12:48,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 16:12:48,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:48,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:48,047 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:12:48,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:48,054 INFO L85 PathProgramCache]: Analyzing trace with hash 757249641, now seen corresponding path program 1 times [2022-11-23 16:12:48,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:12:48,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331068807] [2022-11-23 16:12:48,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:48,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:12:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:48,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:12:48,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331068807] [2022-11-23 16:12:48,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-23 16:12:48,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215446411] [2022-11-23 16:12:48,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:48,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:12:48,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:12:48,291 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:12:48,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 16:12:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:48,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 16:12:48,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:48,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:12:48,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215446411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:12:48,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:12:48,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:12:48,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301735201] [2022-11-23 16:12:48,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:12:48,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:12:48,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:12:48,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:12:48,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:12:48,595 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:12:48,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:48,676 INFO L93 Difference]: Finished difference Result 28 states and 43 transitions. [2022-11-23 16:12:48,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:12:48,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 16:12:48,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:48,691 INFO L225 Difference]: With dead ends: 28 [2022-11-23 16:12:48,691 INFO L226 Difference]: Without dead ends: 14 [2022-11-23 16:12:48,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:12:48,699 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:48,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:12:48,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-23 16:12:48,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-23 16:12:48,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:12:48,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2022-11-23 16:12:48,727 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 20 transitions. Word has length 11 [2022-11-23 16:12:48,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:48,727 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 20 transitions. [2022-11-23 16:12:48,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:12:48,728 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 20 transitions. [2022-11-23 16:12:48,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 16:12:48,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:48,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:48,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:48,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-23 16:12:48,940 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:12:48,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:48,941 INFO L85 PathProgramCache]: Analyzing trace with hash -408293227, now seen corresponding path program 1 times [2022-11-23 16:12:48,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:12:48,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221457832] [2022-11-23 16:12:48,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:48,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:12:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:49,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:12:49,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221457832] [2022-11-23 16:12:49,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-23 16:12:49,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895284125] [2022-11-23 16:12:49,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:49,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:12:49,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:12:49,018 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:12:49,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 16:12:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:49,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 16:12:49,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 16:12:49,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:12:49,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895284125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:12:49,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:12:49,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:12:49,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378464503] [2022-11-23 16:12:49,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:12:49,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:12:49,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:12:49,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:12:49,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:12:49,184 INFO L87 Difference]: Start difference. First operand 14 states and 20 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:12:49,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:49,236 INFO L93 Difference]: Finished difference Result 33 states and 48 transitions. [2022-11-23 16:12:49,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:12:49,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 16:12:49,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:49,237 INFO L225 Difference]: With dead ends: 33 [2022-11-23 16:12:49,237 INFO L226 Difference]: Without dead ends: 24 [2022-11-23 16:12:49,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:12:49,239 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:49,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 6 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 16:12:49,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-23 16:12:49,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2022-11-23 16:12:49,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 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) [2022-11-23 16:12:49,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-11-23 16:12:49,246 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 12 [2022-11-23 16:12:49,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:49,247 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-11-23 16:12:49,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:12:49,247 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-11-23 16:12:49,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 16:12:49,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:49,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:49,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:49,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:12:49,454 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:12:49,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:49,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1121880557, now seen corresponding path program 1 times [2022-11-23 16:12:49,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:12:49,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313083512] [2022-11-23 16:12:49,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:49,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:12:49,530 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 16:12:49,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185804799] [2022-11-23 16:12:49,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:49,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:12:49,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:12:49,532 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:12:49,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 16:12:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:49,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-23 16:12:49,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:49,675 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 [2022-11-23 16:12:49,687 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 [2022-11-23 16:12:49,729 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 [2022-11-23 16:12:49,815 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 [2022-11-23 16:12:49,918 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 [2022-11-23 16:12:50,027 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 [2022-11-23 16:12:50,087 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 [2022-11-23 16:12:50,197 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 [2022-11-23 16:12:50,363 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 51 treesize of output 35 [2022-11-23 16:12:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:50,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:12:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:52,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:12:52,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313083512] [2022-11-23 16:12:52,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 16:12:52,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185804799] [2022-11-23 16:12:52,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185804799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:12:52,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1826538324] [2022-11-23 16:12:52,406 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 16:12:52,406 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:12:52,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:12:52,415 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:12:52,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:12:52,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:52,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:52,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:52,590 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-23 16:12:52,591 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 [2022-11-23 16:12:52,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:52,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:52,623 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 [2022-11-23 16:12:52,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:52,664 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 [2022-11-23 16:12:52,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:52,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:52,744 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 [2022-11-23 16:12:52,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:52,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:52,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:52,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:52,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:52,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:12:52,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:52,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:52,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:52,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:52,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:12:53,007 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-23 16:12:53,012 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 [2022-11-23 16:12:53,154 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 [2022-11-23 16:12:53,198 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-23 16:12:53,200 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 [2022-11-23 16:12:53,296 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-23 16:12:53,297 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 [2022-11-23 16:12:53,356 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 [2022-11-23 16:12:53,386 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 [2022-11-23 16:12:53,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:12:53,434 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-23 16:12:53,434 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 [2022-11-23 16:12:53,512 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-23 16:12:53,513 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 [2022-11-23 16:12:53,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:12:53,596 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-23 16:12:53,596 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 [2022-11-23 16:12:53,682 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-23 16:12:53,682 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 [2022-11-23 16:12:53,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:12:53,756 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-23 16:12:53,756 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 [2022-11-23 16:12:53,861 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-23 16:12:53,862 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 [2022-11-23 16:12:53,926 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:12:55,334 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '362#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 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|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem21#1|) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem21#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |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))' at error location [2022-11-23 16:12:55,334 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:12:55,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:12:55,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2022-11-23 16:12:55,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151539646] [2022-11-23 16:12:55,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 16:12:55,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-23 16:12:55,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:12:55,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-23 16:12:55,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 16:12:55,337 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 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) [2022-11-23 16:13:00,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:13:00,556 INFO L93 Difference]: Finished difference Result 60 states and 80 transitions. [2022-11-23 16:13:00,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-23 16:13:00,557 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 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 17 [2022-11-23 16:13:00,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:13:00,559 INFO L225 Difference]: With dead ends: 60 [2022-11-23 16:13:00,559 INFO L226 Difference]: Without dead ends: 51 [2022-11-23 16:13:00,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 10 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=218, Invalid=1944, Unknown=0, NotChecked=0, Total=2162 [2022-11-23 16:13:00,561 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 42 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:13:00,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 85 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-23 16:13:00,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-23 16:13:00,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2022-11-23 16:13:00,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.4375) internal successors, (46), 32 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) [2022-11-23 16:13:00,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2022-11-23 16:13:00,574 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 17 [2022-11-23 16:13:00,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:13:00,575 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2022-11-23 16:13:00,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 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) [2022-11-23 16:13:00,575 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2022-11-23 16:13:00,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 16:13:00,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:13:00,576 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:13:00,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 16:13:00,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:13:00,782 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:13:00,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:13:00,783 INFO L85 PathProgramCache]: Analyzing trace with hash 294979475, now seen corresponding path program 2 times [2022-11-23 16:13:00,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:13:00,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332954351] [2022-11-23 16:13:00,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:13:00,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:13:00,819 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 16:13:00,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187613452] [2022-11-23 16:13:00,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:13:00,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:13:00,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:13:00,821 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:13:00,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 16:13:00,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 16:13:00,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:13:00,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 16:13:00,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:13:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 16:13:00,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:13:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 16:13:01,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:13:01,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332954351] [2022-11-23 16:13:01,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 16:13:01,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187613452] [2022-11-23 16:13:01,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187613452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:13:01,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [423793311] [2022-11-23 16:13:01,033 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 16:13:01,033 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:13:01,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:13:01,034 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:13:01,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:13:01,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:01,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:01,140 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-23 16:13:01,140 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 [2022-11-23 16:13:01,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:01,175 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-23 16:13:01,176 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 [2022-11-23 16:13:01,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:01,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:01,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:01,305 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-23 16:13:01,305 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 [2022-11-23 16:13:01,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:01,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:01,349 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 [2022-11-23 16:13:01,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:01,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:01,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:01,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:01,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:01,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:13:01,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:13:01,542 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-23 16:13:01,543 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 [2022-11-23 16:13:01,721 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 [2022-11-23 16:13:01,759 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-23 16:13:01,759 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 [2022-11-23 16:13:01,826 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-23 16:13:01,827 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 [2022-11-23 16:13:01,870 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 [2022-11-23 16:13:01,897 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 [2022-11-23 16:13:01,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:13:01,940 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-23 16:13:01,940 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 [2022-11-23 16:13:02,007 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-23 16:13:02,008 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 [2022-11-23 16:13:02,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:13:02,099 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-23 16:13:02,099 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 [2022-11-23 16:13:02,193 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-23 16:13:02,193 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 [2022-11-23 16:13:02,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:13:02,271 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-23 16:13:02,272 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 [2022-11-23 16:13:02,355 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-23 16:13:02,355 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 [2022-11-23 16:13:02,415 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:13:02,980 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '665#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 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|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem21#1|) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem21#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |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))' at error location [2022-11-23 16:13:02,981 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:13:02,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:13:02,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-23 16:13:02,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252633076] [2022-11-23 16:13:02,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 16:13:02,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 16:13:02,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:13:02,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 16:13:02,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-23 16:13:02,983 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2022-11-23 16:13:03,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:13:03,174 INFO L93 Difference]: Finished difference Result 85 states and 116 transitions. [2022-11-23 16:13:03,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 16:13:03,176 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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 18 [2022-11-23 16:13:03,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:13:03,176 INFO L225 Difference]: With dead ends: 85 [2022-11-23 16:13:03,177 INFO L226 Difference]: Without dead ends: 47 [2022-11-23 16:13:03,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 12 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-23 16:13:03,178 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:13:03,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 18 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:13:03,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-23 16:13:03,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2022-11-23 16:13:03,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 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) [2022-11-23 16:13:03,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-11-23 16:13:03,191 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 18 [2022-11-23 16:13:03,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:13:03,191 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-11-23 16:13:03,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2022-11-23 16:13:03,191 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-11-23 16:13:03,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 16:13:03,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:13:03,192 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:13:03,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 16:13:03,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:13:03,404 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:13:03,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:13:03,405 INFO L85 PathProgramCache]: Analyzing trace with hash -47942887, now seen corresponding path program 3 times [2022-11-23 16:13:03,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:13:03,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397977708] [2022-11-23 16:13:03,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:13:03,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:13:03,438 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 16:13:03,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1367316529] [2022-11-23 16:13:03,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:13:03,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:13:03,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:13:03,446 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:13:03,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 16:13:03,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:13:03,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:13:03,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 16:13:03,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:13:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 16:13:03,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:13:03,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 16:13:03,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:13:03,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397977708] [2022-11-23 16:13:03,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 16:13:03,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367316529] [2022-11-23 16:13:03,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367316529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:13:03,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [672038051] [2022-11-23 16:13:03,630 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 16:13:03,630 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:13:03,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:13:03,631 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:13:03,632 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:13:03,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:03,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:03,719 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-23 16:13:03,720 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 [2022-11-23 16:13:03,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:03,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:03,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:03,820 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-23 16:13:03,820 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 [2022-11-23 16:13:03,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:03,842 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 [2022-11-23 16:13:03,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:03,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:03,885 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 [2022-11-23 16:13:04,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:04,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:04,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:04,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:04,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:04,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:13:04,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:13:04,073 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-23 16:13:04,073 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 [2022-11-23 16:13:04,272 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 [2022-11-23 16:13:04,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:13:04,311 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-23 16:13:04,311 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 [2022-11-23 16:13:04,379 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-23 16:13:04,380 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 [2022-11-23 16:13:04,421 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 [2022-11-23 16:13:04,448 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 [2022-11-23 16:13:04,482 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-23 16:13:04,482 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 [2022-11-23 16:13:04,560 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-23 16:13:04,560 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 31 treesize of output 54 [2022-11-23 16:13:04,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:13:04,625 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-23 16:13:04,626 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 [2022-11-23 16:13:04,710 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-23 16:13:04,711 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 [2022-11-23 16:13:04,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:13:04,772 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-23 16:13:04,772 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 [2022-11-23 16:13:04,848 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-23 16:13:04,848 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 [2022-11-23 16:13:04,872 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:13:05,283 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '994#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 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|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem21#1|) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem21#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |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))' at error location [2022-11-23 16:13:05,284 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:13:05,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:13:05,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-23 16:13:05,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574195669] [2022-11-23 16:13:05,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 16:13:05,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 16:13:05,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:13:05,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 16:13:05,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-23 16:13:05,286 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2022-11-23 16:13:05,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:13:05,453 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2022-11-23 16:13:05,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 16:13:05,454 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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 18 [2022-11-23 16:13:05,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:13:05,454 INFO L225 Difference]: With dead ends: 47 [2022-11-23 16:13:05,454 INFO L226 Difference]: Without dead ends: 35 [2022-11-23 16:13:05,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-11-23 16:13:05,455 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 71 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:13:05,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 15 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:13:05,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-23 16:13:05,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2022-11-23 16:13:05,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 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) [2022-11-23 16:13:05,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-11-23 16:13:05,464 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 18 [2022-11-23 16:13:05,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:13:05,464 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-11-23 16:13:05,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2022-11-23 16:13:05,465 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-11-23 16:13:05,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 16:13:05,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:13:05,466 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:13:05,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 16:13:05,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:13:05,672 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:13:05,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:13:05,672 INFO L85 PathProgramCache]: Analyzing trace with hash -2083195031, now seen corresponding path program 4 times [2022-11-23 16:13:05,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:13:05,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838235955] [2022-11-23 16:13:05,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:13:05,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:13:05,702 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 16:13:05,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [482884175] [2022-11-23 16:13:05,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 16:13:05,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:13:05,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:13:05,704 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:13:05,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 16:13:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:13:05,819 WARN L261 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-23 16:13:05,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:13:05,841 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 [2022-11-23 16:13:05,847 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 [2022-11-23 16:13:05,874 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 [2022-11-23 16:13:05,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:05,907 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 [2022-11-23 16:13:06,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:06,012 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 [2022-11-23 16:13:06,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:06,067 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 47 treesize of output 35 [2022-11-23 16:13:06,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:06,158 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 35 treesize of output 33 [2022-11-23 16:13:06,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:06,208 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 [2022-11-23 16:13:06,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:13:06,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:06,310 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 [2022-11-23 16:13:06,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:06,374 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 [2022-11-23 16:13:06,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:13:06,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:06,495 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 54 treesize of output 40 [2022-11-23 16:13:06,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:06,560 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 53 treesize of output 37 [2022-11-23 16:13:06,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:13:06,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:06,697 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 [2022-11-23 16:13:06,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:06,795 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 [2022-11-23 16:13:06,929 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 51 treesize of output 35 [2022-11-23 16:13:06,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:13:06,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:13:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:13:18,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:13:18,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838235955] [2022-11-23 16:13:18,428 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 16:13:18,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482884175] [2022-11-23 16:13:18,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482884175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:13:18,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [595467600] [2022-11-23 16:13:18,431 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 16:13:18,431 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:13:18,431 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:13:18,431 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:13:18,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:13:18,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:18,472 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-23 16:13:18,472 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 [2022-11-23 16:13:18,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:18,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:18,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:18,568 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-23 16:13:18,568 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 [2022-11-23 16:13:18,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:18,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:18,593 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 [2022-11-23 16:13:18,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:18,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:18,634 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 [2022-11-23 16:13:18,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:18,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:18,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:18,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:18,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:18,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:13:18,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:13:18,846 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-23 16:13:18,847 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 [2022-11-23 16:13:19,002 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 [2022-11-23 16:13:19,041 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-23 16:13:19,041 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 [2022-11-23 16:13:19,112 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-23 16:13:19,113 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 [2022-11-23 16:13:19,150 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 [2022-11-23 16:13:19,171 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 [2022-11-23 16:13:19,209 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-23 16:13:19,210 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 [2022-11-23 16:13:19,282 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-23 16:13:19,283 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 [2022-11-23 16:13:19,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:13:19,347 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-23 16:13:19,347 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 [2022-11-23 16:13:19,423 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-23 16:13:19,423 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 [2022-11-23 16:13:19,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:13:19,505 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-23 16:13:19,505 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 [2022-11-23 16:13:19,568 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-23 16:13:19,569 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 [2022-11-23 16:13:19,589 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:13:22,256 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1304#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 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|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem21#1|) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem21#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |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))' at error location [2022-11-23 16:13:22,257 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:13:22,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:13:22,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-11-23 16:13:22,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505478071] [2022-11-23 16:13:22,257 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 16:13:22,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-23 16:13:22,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:13:22,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-23 16:13:22,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1987, Unknown=0, NotChecked=0, Total=2162 [2022-11-23 16:13:22,260 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 42 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 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) [2022-11-23 16:14:10,160 WARN L233 SmtUtils]: Spent 9.34s on a formula simplification that was a NOOP. DAG size: 137 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:14:16,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:14:19,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:14:23,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:14:24,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:14:25,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:14:28,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:14:43,939 WARN L233 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 157 DAG size of output: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:16:29,812 WARN L233 SmtUtils]: Spent 30.82s on a formula simplification that was a NOOP. DAG size: 191 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:16:31,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:16:35,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:16:37,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:16:39,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:16:41,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:16:44,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:16:46,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:16:48,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:16:50,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:16:52,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:16:56,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-11-23 16:17:02,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:17:06,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:17:44,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:17:45,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:17:46,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:17:49,254 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:17:50,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:17:53,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:17:55,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:17:58,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:18:02,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-23 16:18:52,063 WARN L233 SmtUtils]: Spent 6.32s on a formula simplification. DAG size of input: 160 DAG size of output: 115 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:19:07,735 WARN L233 SmtUtils]: Spent 6.75s on a formula simplification. DAG size of input: 163 DAG size of output: 118 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:19:23,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:19:23,901 INFO L93 Difference]: Finished difference Result 91 states and 116 transitions. [2022-11-23 16:19:23,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-23 16:19:23,901 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 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 23 [2022-11-23 16:19:23,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:19:23,902 INFO L225 Difference]: With dead ends: 91 [2022-11-23 16:19:23,903 INFO L226 Difference]: Without dead ends: 80 [2022-11-23 16:19:23,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 13 SyntacticMatches, 9 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 285.2s TimeCoverageRelationStatistics Valid=486, Invalid=5358, Unknown=8, NotChecked=0, Total=5852 [2022-11-23 16:19:23,905 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 83 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 125 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 89.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:19:23,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 215 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1214 Invalid, 11 Unknown, 0 Unchecked, 90.3s Time] [2022-11-23 16:19:23,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-23 16:19:23,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 45. [2022-11-23 16:19:23,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 44 states have internal predecessors, (59), 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) [2022-11-23 16:19:23,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2022-11-23 16:19:23,930 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 23 [2022-11-23 16:19:23,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:19:23,930 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2022-11-23 16:19:23,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 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) [2022-11-23 16:19:23,930 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2022-11-23 16:19:23,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 16:19:23,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:19:23,931 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:19:23,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 16:19:24,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:19:24,132 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:19:24,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:19:24,133 INFO L85 PathProgramCache]: Analyzing trace with hash 634871371, now seen corresponding path program 5 times [2022-11-23 16:19:24,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:19:24,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194131494] [2022-11-23 16:19:24,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:19:24,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:19:24,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 16:19:24,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560224131] [2022-11-23 16:19:24,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:19:24,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:19:24,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:19:24,175 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:19:24,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 16:19:24,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 16:19:24,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:19:24,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 16:19:24,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:19:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 16:19:24,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:19:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 16:19:24,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:19:24,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194131494] [2022-11-23 16:19:24,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 16:19:24,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560224131] [2022-11-23 16:19:24,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560224131] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:19:24,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [855489432] [2022-11-23 16:19:24,511 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 16:19:24,512 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:19:24,512 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:19:24,512 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:19:24,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:19:24,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:24,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:24,627 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-23 16:19:24,627 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 [2022-11-23 16:19:24,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:24,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:24,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:24,732 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-23 16:19:24,733 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 [2022-11-23 16:19:24,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:24,763 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 [2022-11-23 16:19:24,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:24,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:24,804 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 [2022-11-23 16:19:24,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:24,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:24,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:24,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:24,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:24,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:19:24,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:24,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:24,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:24,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:24,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:24,995 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-23 16:19:24,995 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 [2022-11-23 16:19:25,088 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 [2022-11-23 16:19:25,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:19:25,134 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-23 16:19:25,134 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 [2022-11-23 16:19:25,214 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-23 16:19:25,214 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 [2022-11-23 16:19:25,252 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 [2022-11-23 16:19:25,272 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 [2022-11-23 16:19:25,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:19:25,319 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-23 16:19:25,319 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 [2022-11-23 16:19:25,398 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-23 16:19:25,399 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 [2022-11-23 16:19:25,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:19:25,469 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-23 16:19:25,470 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 [2022-11-23 16:19:25,556 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-23 16:19:25,557 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 [2022-11-23 16:19:25,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:19:25,633 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-23 16:19:25,634 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 [2022-11-23 16:19:25,721 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-23 16:19:25,721 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 [2022-11-23 16:19:25,765 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:19:26,596 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1756#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 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|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem21#1|) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem21#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |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))' at error location [2022-11-23 16:19:26,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:19:26,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:19:26,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-23 16:19:26,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90957231] [2022-11-23 16:19:26,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 16:19:26,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 16:19:26,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:19:26,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 16:19:26,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-23 16:19:26,597 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2022-11-23 16:19:26,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:19:26,893 INFO L93 Difference]: Finished difference Result 118 states and 150 transitions. [2022-11-23 16:19:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 16:19:26,894 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 24 [2022-11-23 16:19:26,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:19:26,895 INFO L225 Difference]: With dead ends: 118 [2022-11-23 16:19:26,895 INFO L226 Difference]: Without dead ends: 84 [2022-11-23 16:19:26,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 17 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2022-11-23 16:19:26,896 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 57 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:19:26,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 36 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:19:26,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-23 16:19:26,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2022-11-23 16:19:26,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.21875) internal successors, (78), 64 states have internal predecessors, (78), 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) [2022-11-23 16:19:26,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2022-11-23 16:19:26,935 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 24 [2022-11-23 16:19:26,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:19:26,936 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2022-11-23 16:19:26,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2022-11-23 16:19:26,936 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2022-11-23 16:19:26,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 16:19:26,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:19:26,937 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:19:26,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 16:19:27,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:19:27,144 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:19:27,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:19:27,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1507479445, now seen corresponding path program 6 times [2022-11-23 16:19:27,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:19:27,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347908602] [2022-11-23 16:19:27,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:19:27,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:19:27,199 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 16:19:27,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371123323] [2022-11-23 16:19:27,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:19:27,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:19:27,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:19:27,202 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:19:27,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 16:19:27,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:19:27,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:19:27,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 16:19:27,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:19:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 16:19:27,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:19:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 16:19:27,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:19:27,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347908602] [2022-11-23 16:19:27,491 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 16:19:27,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371123323] [2022-11-23 16:19:27,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371123323] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:19:27,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1682252483] [2022-11-23 16:19:27,494 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 16:19:27,494 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:19:27,494 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:19:27,494 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:19:27,494 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:19:27,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:27,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:27,602 INFO L321 Elim1Store]: treesize reduction 68, result has 33.3 percent of original size [2022-11-23 16:19:27,603 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 [2022-11-23 16:19:27,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:27,643 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-23 16:19:27,643 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 [2022-11-23 16:19:27,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:27,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:27,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:27,770 INFO L321 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2022-11-23 16:19:27,771 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 [2022-11-23 16:19:27,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:27,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:27,845 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 [2022-11-23 16:19:27,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:27,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:27,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:27,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:27,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:27,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:19:27,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:19:28,031 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-23 16:19:28,031 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 [2022-11-23 16:19:28,125 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 [2022-11-23 16:19:28,170 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-23 16:19:28,170 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 [2022-11-23 16:19:28,269 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-23 16:19:28,270 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 [2022-11-23 16:19:28,314 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 [2022-11-23 16:19:28,336 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 [2022-11-23 16:19:28,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:19:28,381 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-23 16:19:28,382 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 [2022-11-23 16:19:28,466 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-23 16:19:28,467 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 [2022-11-23 16:19:28,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:19:28,553 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-23 16:19:28,553 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 [2022-11-23 16:19:28,641 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-23 16:19:28,642 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 [2022-11-23 16:19:28,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:19:28,714 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-23 16:19:28,714 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 [2022-11-23 16:19:28,795 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-23 16:19:28,796 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 [2022-11-23 16:19:28,816 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:19:29,361 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2241#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 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|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem21#1|) (= (ite (= (+ (* 2 ~N~0) (* ~N~0 ~N~0)) |ULTIMATE.start_main_#t~mem21#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |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))' at error location [2022-11-23 16:19:29,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:19:29,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:19:29,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-23 16:19:29,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170503150] [2022-11-23 16:19:29,362 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 16:19:29,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 16:19:29,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:19:29,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 16:19:29,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-11-23 16:19:29,364 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2022-11-23 16:19:29,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:19:29,719 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2022-11-23 16:19:29,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 16:19:29,720 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 24 [2022-11-23 16:19:29,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:19:29,720 INFO L225 Difference]: With dead ends: 87 [2022-11-23 16:19:29,721 INFO L226 Difference]: Without dead ends: 68 [2022-11-23 16:19:29,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-11-23 16:19:29,722 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:19:29,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 52 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:19:29,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-23 16:19:29,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2022-11-23 16:19:29,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.16) internal successors, (58), 50 states have internal predecessors, (58), 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) [2022-11-23 16:19:29,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-11-23 16:19:29,752 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 24 [2022-11-23 16:19:29,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:19:29,752 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-11-23 16:19:29,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2022-11-23 16:19:29,752 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-11-23 16:19:29,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 16:19:29,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:19:29,753 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:19:29,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 16:19:29,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:19:29,955 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 16:19:29,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:19:29,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1819517878, now seen corresponding path program 1 times [2022-11-23 16:19:29,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:19:29,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470883947] [2022-11-23 16:19:29,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:19:29,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:19:29,988 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 16:19:29,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975593838] [2022-11-23 16:19:29,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:19:29,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:19:29,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:19:29,994 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:19:30,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f5c5ff9b-fdad-4111-b28b-fde7239c25d0/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 16:19:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:19:30,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-23 16:19:30,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:19:30,129 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 [2022-11-23 16:19:30,192 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 16 treesize of output 12 [2022-11-23 16:19:30,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:30,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 16:19:30,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:30,289 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 38 treesize of output 32 [2022-11-23 16:19:30,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:30,330 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 46 treesize of output 32 [2022-11-23 16:19:30,383 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 31 treesize of output 27 [2022-11-23 16:19:30,388 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 9 treesize of output 7 [2022-11-23 16:19:30,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:30,419 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 25 treesize of output 27 [2022-11-23 16:19:30,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:30,467 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 35 treesize of output 29 [2022-11-23 16:19:30,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:30,508 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 31 [2022-11-23 16:19:30,694 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:19:30,694 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 1 case distinctions, treesize of input 61 treesize of output 41 [2022-11-23 16:19:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 16:19:30,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:19:49,598 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:19:49,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 73 [2022-11-23 16:19:49,618 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_1 (Array Int Int)) (~N~0 Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse1 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse0 (+ (* 2 ~N~0) (* ~N~0 ~N~0))) (.cse3 (+ (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (or (= .cse0 (+ (select .cse1 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (select (select (store .cse2 |c_ULTIMATE.start_main_~a~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| .cse3)) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (not (= .cse0 .cse3))))))) is different from false [2022-11-23 16:19:53,547 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_1 (Array Int Int)) (~N~0 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse8 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (let ((.cse5 (+ .cse8 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse4 (let ((.cse7 (+ .cse8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (store .cse6 .cse7 (+ (select .cse6 .cse7) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|)))))) (store .cse4 .cse5 (+ (select .cse6 .cse5) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse4) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|)))))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse2 (+ (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|))) (.cse3 (+ (* 2 ~N~0) (* ~N~0 ~N~0)))) (or (= (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| .cse2)) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse1 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) .cse3) (not (= .cse2 .cse3))))))) is different from false [2022-11-23 16:20:31,495 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_1 (Array Int Int)) (~N~0 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse3 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse6 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) 0))) (let ((.cse5 (store .cse6 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse6) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse5 .cse3 (+ (select .cse6 .cse3) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse5) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|)))))) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse4 (+ (* 2 ~N~0) (* ~N~0 ~N~0))) (.cse2 (+ (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|)))) (or (= (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| (store .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| .cse2)) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse1 .cse3)) .cse4) (not (= .cse4 .cse2)))))))) is different from false [2022-11-23 16:20:36,285 INFO L321 Elim1Store]: treesize reduction 530, result has 47.1 percent of original size [2022-11-23 16:20:36,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 16880 treesize of output 4465 [2022-11-23 16:20:38,545 INFO L321 Elim1Store]: treesize reduction 208, result has 29.3 percent of original size [2022-11-23 16:20:38,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 7239 treesize of output 7280 [2022-11-23 16:20:39,806 INFO L321 Elim1Store]: treesize reduction 408, result has 19.8 percent of original size [2022-11-23 16:20:39,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 11403 treesize of output 11158 [2022-11-23 16:20:40,014 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:20:40,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7157 treesize of output 7151 [2022-11-23 16:20:40,311 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:20:40,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 12192 treesize of output 11250