./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/eqn1f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn1f.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 18b341884f23a5462ed7b5a2994c7faf53737afb439f1d86e003040fe93a66eb --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 16:14:46,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 16:14:46,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 16:14:46,414 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 16:14:46,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 16:14:46,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 16:14:46,417 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 16:14:46,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 16:14:46,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 16:14:46,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 16:14:46,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 16:14:46,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 16:14:46,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 16:14:46,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 16:14:46,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 16:14:46,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 16:14:46,429 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 16:14:46,430 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 16:14:46,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 16:14:46,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 16:14:46,436 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 16:14:46,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 16:14:46,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 16:14:46,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 16:14:46,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 16:14:46,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 16:14:46,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 16:14:46,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 16:14:46,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 16:14:46,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 16:14:46,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 16:14:46,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 16:14:46,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 16:14:46,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 16:14:46,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 16:14:46,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 16:14:46,451 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 16:14:46,452 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 16:14:46,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 16:14:46,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 16:14:46,454 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 16:14:46,455 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 16:14:46,477 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 16:14:46,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 16:14:46,478 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 16:14:46,478 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 16:14:46,479 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 16:14:46,479 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 16:14:46,480 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 16:14:46,480 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 16:14:46,480 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 16:14:46,480 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 16:14:46,481 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 16:14:46,481 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 16:14:46,481 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 16:14:46,481 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 16:14:46,482 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 16:14:46,482 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 16:14:46,482 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 16:14:46,483 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 16:14:46,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 16:14:46,484 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 16:14:46,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 16:14:46,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 16:14:46,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 16:14:46,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 16:14:46,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 16:14:46,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 16:14:46,485 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 16:14:46,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 16:14:46,486 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 16:14:46,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 16:14:46,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 16:14:46,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 16:14:46,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:14:46,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 16:14:46,488 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 16:14:46,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 16:14:46,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 16:14:46,488 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 16:14:46,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 16:14:46,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 16:14:46,489 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 16:14:46,490 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_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18b341884f23a5462ed7b5a2994c7faf53737afb439f1d86e003040fe93a66eb [2022-11-16 16:14:46,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 16:14:46,841 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 16:14:46,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 16:14:46,847 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 16:14:46,848 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 16:14:46,849 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-fpi/eqn1f.c [2022-11-16 16:14:46,919 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/data/2c7a68823/352964b0fa0d4034ac78832862715301/FLAG4a6d9cd28 [2022-11-16 16:14:47,428 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 16:14:47,429 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/sv-benchmarks/c/array-fpi/eqn1f.c [2022-11-16 16:14:47,435 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/data/2c7a68823/352964b0fa0d4034ac78832862715301/FLAG4a6d9cd28 [2022-11-16 16:14:47,809 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/data/2c7a68823/352964b0fa0d4034ac78832862715301 [2022-11-16 16:14:47,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 16:14:47,813 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 16:14:47,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 16:14:47,815 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 16:14:47,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 16:14:47,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:14:47" (1/1) ... [2022-11-16 16:14:47,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d750961 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:14:47, skipping insertion in model container [2022-11-16 16:14:47,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 04:14:47" (1/1) ... [2022-11-16 16:14:47,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 16:14:47,848 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 16:14:48,030 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/sv-benchmarks/c/array-fpi/eqn1f.c[588,601] [2022-11-16 16:14:48,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:14:48,056 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 16:14:48,070 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/sv-benchmarks/c/array-fpi/eqn1f.c[588,601] [2022-11-16 16:14:48,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 16:14:48,092 INFO L208 MainTranslator]: Completed translation [2022-11-16 16:14:48,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:14:48 WrapperNode [2022-11-16 16:14:48,092 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 16:14:48,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 16:14:48,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 16:14:48,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 16:14:48,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:14:48" (1/1) ... [2022-11-16 16:14:48,108 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:14:48" (1/1) ... [2022-11-16 16:14:48,139 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2022-11-16 16:14:48,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 16:14:48,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 16:14:48,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 16:14:48,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 16:14:48,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:14:48" (1/1) ... [2022-11-16 16:14:48,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:14:48" (1/1) ... [2022-11-16 16:14:48,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:14:48" (1/1) ... [2022-11-16 16:14:48,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:14:48" (1/1) ... [2022-11-16 16:14:48,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:14:48" (1/1) ... [2022-11-16 16:14:48,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:14:48" (1/1) ... [2022-11-16 16:14:48,185 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:14:48" (1/1) ... [2022-11-16 16:14:48,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:14:48" (1/1) ... [2022-11-16 16:14:48,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 16:14:48,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 16:14:48,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 16:14:48,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 16:14:48,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:14:48" (1/1) ... [2022-11-16 16:14:48,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 16:14:48,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:14:48,235 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 16:14:48,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 16:14:48,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 16:14:48,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 16:14:48,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 16:14:48,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 16:14:48,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 16:14:48,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 16:14:48,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 16:14:48,354 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 16:14:48,356 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 16:14:48,613 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 16:14:48,691 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 16:14:48,691 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 16:14:48,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:14:48 BoogieIcfgContainer [2022-11-16 16:14:48,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 16:14:48,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 16:14:48,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 16:14:48,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 16:14:48,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 04:14:47" (1/3) ... [2022-11-16 16:14:48,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58fe3122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:14:48, skipping insertion in model container [2022-11-16 16:14:48,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 04:14:48" (2/3) ... [2022-11-16 16:14:48,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58fe3122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 04:14:48, skipping insertion in model container [2022-11-16 16:14:48,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:14:48" (3/3) ... [2022-11-16 16:14:48,726 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn1f.c [2022-11-16 16:14:48,744 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 16:14:48,744 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 16:14:48,804 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 16:14:48,820 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;@24f920c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 16:14:48,820 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 16:14:48,824 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:48,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 16:14:48,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:48,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:48,845 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:14:48,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:48,850 INFO L85 PathProgramCache]: Analyzing trace with hash -794748304, now seen corresponding path program 1 times [2022-11-16 16:14:48,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:48,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285930565] [2022-11-16 16:14:48,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:48,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:49,044 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 16:14:49,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675990357] [2022-11-16 16:14:49,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:49,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:14:49,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:14:49,055 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:14:49,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 16:14:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:49,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 16:14:49,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:14:49,333 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 16:14:49,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 16:14:49,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 16:14:49,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 16:14:49,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 16:14:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:49,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:14:49,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:49,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285930565] [2022-11-16 16:14:49,639 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 16:14:49,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675990357] [2022-11-16 16:14:49,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675990357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:49,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:49,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 16:14:49,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377605036] [2022-11-16 16:14:49,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:49,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 16:14:49,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:49,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 16:14:49,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:14:49,710 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:49,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:49,852 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-11-16 16:14:49,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:14:49,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 16:14:49,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:49,863 INFO L225 Difference]: With dead ends: 35 [2022-11-16 16:14:49,863 INFO L226 Difference]: Without dead ends: 20 [2022-11-16 16:14:49,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 16:14:49,870 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:49,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 19 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:14:49,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-16 16:14:49,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 13. [2022-11-16 16:14:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2022-11-16 16:14:49,908 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 7 [2022-11-16 16:14:49,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:49,908 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2022-11-16 16:14:49,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:49,909 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2022-11-16 16:14:49,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:14:49,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:49,910 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:49,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 16:14:50,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-16 16:14:50,115 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:14:50,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:50,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1127926275, now seen corresponding path program 1 times [2022-11-16 16:14:50,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:50,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555914139] [2022-11-16 16:14:50,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:50,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:50,149 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 16:14:50,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918061252] [2022-11-16 16:14:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:50,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:14:50,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:14:50,151 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:14:50,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 16:14:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:50,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 16:14:50,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:14:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:50,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:14:50,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:50,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555914139] [2022-11-16 16:14:50,269 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 16:14:50,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918061252] [2022-11-16 16:14:50,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918061252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:50,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:50,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 16:14:50,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851859781] [2022-11-16 16:14:50,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:50,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 16:14:50,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:50,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 16:14:50,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 16:14:50,278 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:50,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:50,324 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2022-11-16 16:14:50,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 16:14:50,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 16:14:50,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:50,326 INFO L225 Difference]: With dead ends: 25 [2022-11-16 16:14:50,326 INFO L226 Difference]: Without dead ends: 19 [2022-11-16 16:14:50,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 16:14:50,330 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:50,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:14:50,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-16 16:14:50,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2022-11-16 16:14:50,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:50,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-16 16:14:50,340 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2022-11-16 16:14:50,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:50,341 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-16 16:14:50,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:50,341 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-16 16:14:50,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 16:14:50,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:50,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:50,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 16:14:50,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:14:50,547 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:14:50,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:50,548 INFO L85 PathProgramCache]: Analyzing trace with hash 849022933, now seen corresponding path program 1 times [2022-11-16 16:14:50,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:50,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927324828] [2022-11-16 16:14:50,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:50,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:50,571 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 16:14:50,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2103526216] [2022-11-16 16:14:50,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:50,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:14:50,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:14:50,573 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:14:50,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 16:14:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:50,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 16:14:50,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:14:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:50,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:14:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:50,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:50,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927324828] [2022-11-16 16:14:50,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 16:14:50,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103526216] [2022-11-16 16:14:50,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103526216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:14:50,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1291154798] [2022-11-16 16:14:50,749 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:14:50,750 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:14:50,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:14:50,759 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:14:50,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:14:50,955 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 16:14:50,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 16:14:51,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 37 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 115 [2022-11-16 16:14:51,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-16 16:14:51,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 38 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 132 [2022-11-16 16:14:51,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:51,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:51,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:51,493 INFO L321 Elim1Store]: treesize reduction 134, result has 6.9 percent of original size [2022-11-16 16:14:51,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 52 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 47 case distinctions, treesize of input 502 treesize of output 487 [2022-11-16 16:14:51,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-16 16:14:51,735 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:14:52,115 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '238#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (<= ~N~0 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= (+ |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 16:14:52,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:14:52,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:14:52,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-11-16 16:14:52,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548034285] [2022-11-16 16:14:52,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 16:14:52,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 16:14:52,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:52,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 16:14:52,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-16 16:14:52,117 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:52,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:52,209 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-11-16 16:14:52,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 16:14:52,210 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 16:14:52,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:52,210 INFO L225 Difference]: With dead ends: 29 [2022-11-16 16:14:52,210 INFO L226 Difference]: Without dead ends: 24 [2022-11-16 16:14:52,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-16 16:14:52,211 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:52,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 18 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:14:52,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-16 16:14:52,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2022-11-16 16:14:52,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:52,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-11-16 16:14:52,216 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2022-11-16 16:14:52,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:52,216 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-11-16 16:14:52,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:52,216 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-11-16 16:14:52,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 16:14:52,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:52,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:52,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 16:14:52,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:14:52,423 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:14:52,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:52,424 INFO L85 PathProgramCache]: Analyzing trace with hash 545227070, now seen corresponding path program 1 times [2022-11-16 16:14:52,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:52,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393328103] [2022-11-16 16:14:52,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:52,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:52,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 16:14:52,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342050548] [2022-11-16 16:14:52,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:52,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:14:52,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:14:52,456 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:14:52,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 16:14:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:52,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 16:14:52,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:14:52,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 16:14:52,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:52,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-16 16:14:52,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 16:14:52,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 16:14:52,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:52,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 16:14:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:52,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:14:52,747 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_114 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_114) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) is different from false [2022-11-16 16:14:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-16 16:14:52,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:52,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393328103] [2022-11-16 16:14:52,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 16:14:52,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342050548] [2022-11-16 16:14:52,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342050548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:14:52,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1207732714] [2022-11-16 16:14:52,770 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:14:52,770 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:14:52,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:14:52,771 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:14:52,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:14:52,867 INFO L321 Elim1Store]: treesize reduction 66, result has 37.7 percent of original size [2022-11-16 16:14:52,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 133 [2022-11-16 16:14:53,010 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 16:14:53,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 16:14:53,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-16 16:14:53,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:53,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 38 disjoint index pairs (out of 78 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 140 [2022-11-16 16:14:53,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:53,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:53,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,358 INFO L321 Elim1Store]: treesize reduction 160, result has 0.6 percent of original size [2022-11-16 16:14:53,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 53 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 46 case distinctions, treesize of input 502 treesize of output 487 [2022-11-16 16:14:53,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-16 16:14:53,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:53,535 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:14:53,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 16:14:53,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:53,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:53,568 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:14:53,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 16:14:53,584 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:14:54,006 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '370#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= (+ |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 16:14:54,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:14:54,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:14:54,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-16 16:14:54,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860712924] [2022-11-16 16:14:54,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 16:14:54,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 16:14:54,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:54,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 16:14:54,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=198, Unknown=1, NotChecked=28, Total=272 [2022-11-16 16:14:54,008 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:54,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:54,193 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-11-16 16:14:54,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 16:14:54,194 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 16:14:54,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:54,194 INFO L225 Difference]: With dead ends: 33 [2022-11-16 16:14:54,194 INFO L226 Difference]: Without dead ends: 31 [2022-11-16 16:14:54,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=339, Unknown=1, NotChecked=38, Total=462 [2022-11-16 16:14:54,195 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:54,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 29 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-11-16 16:14:54,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-16 16:14:54,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 17. [2022-11-16 16:14:54,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:54,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-11-16 16:14:54,200 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2022-11-16 16:14:54,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:54,201 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-11-16 16:14:54,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:54,201 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-11-16 16:14:54,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:14:54,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:54,202 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:54,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 16:14:54,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:14:54,417 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:14:54,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:54,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1813092602, now seen corresponding path program 1 times [2022-11-16 16:14:54,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:54,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634306220] [2022-11-16 16:14:54,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:54,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:54,433 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 16:14:54,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1252072456] [2022-11-16 16:14:54,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:54,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:14:54,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:14:54,435 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:14:54,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 16:14:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:54,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 16:14:54,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:14:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:54,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 16:14:54,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:54,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634306220] [2022-11-16 16:14:54,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 16:14:54,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252072456] [2022-11-16 16:14:54,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252072456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 16:14:54,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 16:14:54,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 16:14:54,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778121524] [2022-11-16 16:14:54,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 16:14:54,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 16:14:54,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:54,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 16:14:54,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 16:14:54,555 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:54,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:54,613 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-11-16 16:14:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:14:54,614 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 16:14:54,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:54,614 INFO L225 Difference]: With dead ends: 31 [2022-11-16 16:14:54,615 INFO L226 Difference]: Without dead ends: 21 [2022-11-16 16:14:54,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 16:14:54,616 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:54,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 16:14:54,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-16 16:14:54,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2022-11-16 16:14:54,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:54,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-16 16:14:54,620 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2022-11-16 16:14:54,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:54,621 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-16 16:14:54,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:54,621 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-16 16:14:54,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:14:54,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:54,622 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:54,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 16:14:54,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:14:54,827 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:14:54,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:54,828 INFO L85 PathProgramCache]: Analyzing trace with hash -282510091, now seen corresponding path program 2 times [2022-11-16 16:14:54,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:54,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392154146] [2022-11-16 16:14:54,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:54,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:54,865 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 16:14:54,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580127653] [2022-11-16 16:14:54,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:14:54,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:14:54,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:14:54,874 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:14:54,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 16:14:54,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:14:54,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:14:54,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:14:54,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:14:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:54,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:14:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:55,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:55,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392154146] [2022-11-16 16:14:55,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 16:14:55,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580127653] [2022-11-16 16:14:55,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580127653] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:14:55,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1373929020] [2022-11-16 16:14:55,022 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:14:55,023 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:14:55,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:14:55,023 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:14:55,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:14:55,156 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 16:14:55,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 16:14:55,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-16 16:14:55,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 37 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 115 [2022-11-16 16:14:55,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 38 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 132 [2022-11-16 16:14:55,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:55,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:55,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,545 INFO L321 Elim1Store]: treesize reduction 129, result has 10.4 percent of original size [2022-11-16 16:14:55,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 52 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 47 case distinctions, treesize of input 500 treesize of output 492 [2022-11-16 16:14:55,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-16 16:14:55,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,793 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:14:55,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-16 16:14:55,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:55,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:55,858 INFO L321 Elim1Store]: treesize reduction 124, result has 7.5 percent of original size [2022-11-16 16:14:55,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 92 treesize of output 104 [2022-11-16 16:14:55,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:55,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:55,903 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:14:55,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 16:14:55,923 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:14:56,223 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '628#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= (+ |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 16:14:56,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:14:56,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:14:56,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-11-16 16:14:56,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413177005] [2022-11-16 16:14:56,224 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 16:14:56,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 16:14:56,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:56,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 16:14:56,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-16 16:14:56,225 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:56,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:56,308 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-11-16 16:14:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 16:14:56,309 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 16:14:56,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:56,310 INFO L225 Difference]: With dead ends: 33 [2022-11-16 16:14:56,310 INFO L226 Difference]: Without dead ends: 27 [2022-11-16 16:14:56,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-16 16:14:56,311 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:56,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 21 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:14:56,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-16 16:14:56,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2022-11-16 16:14:56,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:56,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-16 16:14:56,316 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2022-11-16 16:14:56,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:56,316 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-16 16:14:56,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:56,316 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-16 16:14:56,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 16:14:56,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:56,317 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:56,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 16:14:56,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 16:14:56,518 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:14:56,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:56,518 INFO L85 PathProgramCache]: Analyzing trace with hash -338579101, now seen corresponding path program 3 times [2022-11-16 16:14:56,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:56,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051445235] [2022-11-16 16:14:56,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:56,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:56,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 16:14:56,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829973120] [2022-11-16 16:14:56,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:14:56,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:14:56,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:14:56,550 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:14:56,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 16:14:56,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:14:56,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:14:56,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 16:14:56,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:14:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:56,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:14:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:14:56,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:56,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051445235] [2022-11-16 16:14:56,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 16:14:56,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829973120] [2022-11-16 16:14:56,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829973120] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:14:56,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2094541213] [2022-11-16 16:14:56,692 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:14:56,692 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:14:56,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:14:56,693 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:14:56,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:14:56,773 INFO L321 Elim1Store]: treesize reduction 66, result has 37.7 percent of original size [2022-11-16 16:14:56,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 133 [2022-11-16 16:14:56,930 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 16:14:56,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 16:14:56,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-16 16:14:56,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:56,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 38 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 132 [2022-11-16 16:14:57,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:57,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:57,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,195 INFO L321 Elim1Store]: treesize reduction 134, result has 6.9 percent of original size [2022-11-16 16:14:57,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 52 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 47 case distinctions, treesize of input 500 treesize of output 487 [2022-11-16 16:14:57,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-16 16:14:57,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:57,346 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:14:57,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 16:14:57,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:57,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:57,382 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-16 16:14:57,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 101 [2022-11-16 16:14:57,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:57,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:57,421 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:14:57,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 16:14:57,470 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:14:57,901 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '772#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= (+ |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 16:14:57,901 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:14:57,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:14:57,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-16 16:14:57,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688425846] [2022-11-16 16:14:57,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 16:14:57,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 16:14:57,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:14:57,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 16:14:57,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-16 16:14:57,903 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:58,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:14:58,032 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-11-16 16:14:58,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 16:14:58,032 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 16:14:58,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:14:58,033 INFO L225 Difference]: With dead ends: 37 [2022-11-16 16:14:58,033 INFO L226 Difference]: Without dead ends: 32 [2022-11-16 16:14:58,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-16 16:14:58,034 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:14:58,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 25 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:14:58,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-16 16:14:58,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 17. [2022-11-16 16:14:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:58,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-16 16:14:58,039 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 10 [2022-11-16 16:14:58,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:14:58,039 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-16 16:14:58,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:14:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-16 16:14:58,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 16:14:58,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:14:58,040 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:14:58,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 16:14:58,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 16:14:58,241 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:14:58,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:14:58,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1910697616, now seen corresponding path program 4 times [2022-11-16 16:14:58,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:14:58,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430191172] [2022-11-16 16:14:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:14:58,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:14:58,267 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 16:14:58,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310298254] [2022-11-16 16:14:58,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 16:14:58,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:14:58,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:14:58,285 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:14:58,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 16:14:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:14:58,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 16:14:58,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:14:58,410 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 16:14:58,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 16:14:58,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 16:14:58,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 16:14:58,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:58,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-11-16 16:14:58,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 16:14:58,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 16:14:58,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 16:14:58,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 16:14:58,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:58,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 16:14:58,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:58,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 16:14:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:14:58,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:14:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 16:14:58,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:14:58,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430191172] [2022-11-16 16:14:58,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 16:14:58,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310298254] [2022-11-16 16:14:58,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310298254] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:14:58,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1642712771] [2022-11-16 16:14:58,824 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:14:58,826 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:14:58,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:14:58,826 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:14:58,827 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:14:58,961 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-16 16:14:58,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-11-16 16:14:59,049 INFO L321 Elim1Store]: treesize reduction 66, result has 37.7 percent of original size [2022-11-16 16:14:59,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 133 [2022-11-16 16:14:59,195 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 16:14:59,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 16:14:59,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:59,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 38 disjoint index pairs (out of 78 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 140 [2022-11-16 16:14:59,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:59,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:59,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,480 INFO L321 Elim1Store]: treesize reduction 160, result has 0.6 percent of original size [2022-11-16 16:14:59,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 53 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 46 case distinctions, treesize of input 513 treesize of output 489 [2022-11-16 16:14:59,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-16 16:14:59,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,615 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:14:59,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-16 16:14:59,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:59,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:59,680 INFO L321 Elim1Store]: treesize reduction 124, result has 7.5 percent of original size [2022-11-16 16:14:59,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 92 treesize of output 104 [2022-11-16 16:14:59,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:14:59,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:14:59,731 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:14:59,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 16:14:59,748 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:15:00,075 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '937#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= (+ |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 16:15:00,076 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:15:00,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:15:00,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-16 16:15:00,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763357378] [2022-11-16 16:15:00,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 16:15:00,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 16:15:00,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:15:00,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 16:15:00,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=282, Unknown=2, NotChecked=0, Total=342 [2022-11-16 16:15:00,077 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:15:00,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:15:00,360 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-11-16 16:15:00,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 16:15:00,361 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 16:15:00,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:15:00,361 INFO L225 Difference]: With dead ends: 44 [2022-11-16 16:15:00,361 INFO L226 Difference]: Without dead ends: 42 [2022-11-16 16:15:00,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=666, Unknown=2, NotChecked=0, Total=812 [2022-11-16 16:15:00,363 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 60 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:15:00,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 45 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 68 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-11-16 16:15:00,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-16 16:15:00,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 19. [2022-11-16 16:15:00,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:15:00,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-11-16 16:15:00,373 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 11 [2022-11-16 16:15:00,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:15:00,373 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-11-16 16:15:00,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:15:00,373 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-11-16 16:15:00,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 16:15:00,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:15:00,374 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:15:00,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 16:15:00,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:15:00,580 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:15:00,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:15:00,580 INFO L85 PathProgramCache]: Analyzing trace with hash -701556884, now seen corresponding path program 1 times [2022-11-16 16:15:00,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:15:00,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831315271] [2022-11-16 16:15:00,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:15:00,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:15:00,596 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 16:15:00,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [290759288] [2022-11-16 16:15:00,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:15:00,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:15:00,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:15:00,598 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:15:00,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 16:15:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 16:15:00,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-16 16:15:00,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:15:00,740 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-11-16 16:15:00,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-11-16 16:15:00,769 INFO L321 Elim1Store]: treesize reduction 35, result has 34.0 percent of original size [2022-11-16 16:15:00,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 71 [2022-11-16 16:15:00,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 16:15:00,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 16:15:00,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 16:15:00,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 51 [2022-11-16 16:15:00,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:00,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-11-16 16:15:00,919 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 32 [2022-11-16 16:15:00,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:00,924 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 [2022-11-16 16:15:00,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 16:15:00,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:00,988 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:15:00,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-16 16:15:01,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,049 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:15:01,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2022-11-16 16:15:01,218 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 16:15:01,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 56 treesize of output 32 [2022-11-16 16:15:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:15:01,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:15:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:15:01,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:15:01,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831315271] [2022-11-16 16:15:01,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 16:15:01,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290759288] [2022-11-16 16:15:01,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290759288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:15:01,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [33708129] [2022-11-16 16:15:01,458 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 16:15:01,458 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:15:01,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:15:01,459 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:15:01,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:15:01,546 INFO L321 Elim1Store]: treesize reduction 66, result has 37.7 percent of original size [2022-11-16 16:15:01,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 133 [2022-11-16 16:15:01,670 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 16:15:01,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 16:15:01,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-16 16:15:01,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:01,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 38 disjoint index pairs (out of 78 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 140 [2022-11-16 16:15:01,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:01,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:01,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:01,930 INFO L321 Elim1Store]: treesize reduction 160, result has 0.6 percent of original size [2022-11-16 16:15:01,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 53 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 46 case distinctions, treesize of input 513 treesize of output 489 [2022-11-16 16:15:02,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-16 16:15:02,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:02,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:02,042 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:15:02,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 16:15:02,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:02,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:02,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:02,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:02,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:02,076 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-16 16:15:02,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 101 [2022-11-16 16:15:02,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:02,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:02,113 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:15:02,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 16:15:02,177 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:15:02,723 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1141#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= (+ |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 16:15:02,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:15:02,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:15:02,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2022-11-16 16:15:02,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006919641] [2022-11-16 16:15:02,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 16:15:02,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 16:15:02,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:15:02,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 16:15:02,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-11-16 16:15:02,725 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:15:02,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:15:02,872 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-11-16 16:15:02,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 16:15:02,873 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 16:15:02,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:15:02,875 INFO L225 Difference]: With dead ends: 26 [2022-11-16 16:15:02,876 INFO L226 Difference]: Without dead ends: 24 [2022-11-16 16:15:02,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-11-16 16:15:02,879 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 16:15:02,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 15 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2022-11-16 16:15:02,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-16 16:15:02,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-11-16 16:15:02,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:15:02,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-11-16 16:15:02,890 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 12 [2022-11-16 16:15:02,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:15:02,890 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-11-16 16:15:02,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:15:02,892 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-11-16 16:15:02,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 16:15:02,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:15:02,893 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:15:02,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 16:15:03,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 16:15:03,098 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:15:03,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:15:03,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1915831248, now seen corresponding path program 5 times [2022-11-16 16:15:03,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:15:03,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472176622] [2022-11-16 16:15:03,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:15:03,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:15:03,124 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 16:15:03,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200670876] [2022-11-16 16:15:03,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:15:03,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:15:03,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:15:03,128 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:15:03,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 16:15:03,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 16:15:03,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:15:03,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 16:15:03,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:15:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:15:03,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:15:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:15:03,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:15:03,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472176622] [2022-11-16 16:15:03,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 16:15:03,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200670876] [2022-11-16 16:15:03,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200670876] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:15:03,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1820285066] [2022-11-16 16:15:03,371 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:15:03,371 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:15:03,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:15:03,372 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:15:03,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:15:03,500 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-16 16:15:03,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-11-16 16:15:03,595 INFO L321 Elim1Store]: treesize reduction 66, result has 37.7 percent of original size [2022-11-16 16:15:03,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 133 [2022-11-16 16:15:03,723 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 16:15:03,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 16:15:03,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 38 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 132 [2022-11-16 16:15:03,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:03,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:03,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:03,987 INFO L321 Elim1Store]: treesize reduction 129, result has 10.4 percent of original size [2022-11-16 16:15:03,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 52 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 47 case distinctions, treesize of input 500 treesize of output 492 [2022-11-16 16:15:04,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-16 16:15:04,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:04,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:04,190 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:15:04,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 16:15:04,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:04,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:04,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:04,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:04,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:04,228 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-16 16:15:04,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 101 [2022-11-16 16:15:04,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:04,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:04,259 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:15:04,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 16:15:04,271 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:15:04,576 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1312#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= (+ |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 16:15:04,576 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:15:04,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:15:04,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-11-16 16:15:04,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776855340] [2022-11-16 16:15:04,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 16:15:04,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 16:15:04,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:15:04,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 16:15:04,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-16 16:15:04,578 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:15:04,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:15:04,876 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2022-11-16 16:15:04,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 16:15:04,877 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 16:15:04,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:15:04,877 INFO L225 Difference]: With dead ends: 78 [2022-11-16 16:15:04,878 INFO L226 Difference]: Without dead ends: 58 [2022-11-16 16:15:04,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=719, Unknown=0, NotChecked=0, Total=930 [2022-11-16 16:15:04,879 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 80 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:15:04,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 41 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 16:15:04,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-16 16:15:04,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 34. [2022-11-16 16:15:04,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:15:04,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-11-16 16:15:04,888 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 13 [2022-11-16 16:15:04,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:15:04,888 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-11-16 16:15:04,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:15:04,889 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-11-16 16:15:04,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 16:15:04,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:15:04,889 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:15:04,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 16:15:05,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 16:15:05,095 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:15:05,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:15:05,095 INFO L85 PathProgramCache]: Analyzing trace with hash -385990150, now seen corresponding path program 2 times [2022-11-16 16:15:05,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:15:05,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358131024] [2022-11-16 16:15:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:15:05,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:15:05,126 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 16:15:05,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807101030] [2022-11-16 16:15:05,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 16:15:05,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:15:05,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:15:05,136 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:15:05,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 16:15:05,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 16:15:05,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:15:05,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-16 16:15:05,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:15:05,279 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-11-16 16:15:05,280 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-11-16 16:15:05,319 INFO L321 Elim1Store]: treesize reduction 35, result has 34.0 percent of original size [2022-11-16 16:15:05,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 71 [2022-11-16 16:15:05,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 16:15:05,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 16:15:05,374 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 16 treesize of output 5 [2022-11-16 16:15:05,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 16:15:05,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 51 [2022-11-16 16:15:05,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:05,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-11-16 16:15:05,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 16:15:05,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:05,544 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:15:05,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-16 16:15:05,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:05,590 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:15:05,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-16 16:15:05,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:05,632 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:15:05,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2022-11-16 16:15:05,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:05,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:05,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:05,672 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:15:05,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 46 [2022-11-16 16:15:05,809 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 16:15:05,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 52 treesize of output 32 [2022-11-16 16:15:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:15:05,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:15:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:15:06,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:15:06,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358131024] [2022-11-16 16:15:06,459 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 16:15:06,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807101030] [2022-11-16 16:15:06,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807101030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:15:06,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2049790220] [2022-11-16 16:15:06,461 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 16:15:06,461 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:15:06,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:15:06,462 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:15:06,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:15:06,588 INFO L321 Elim1Store]: treesize reduction 111, result has 29.3 percent of original size [2022-11-16 16:15:06,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 64 [2022-11-16 16:15:06,710 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 16:15:06,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 16:15:06,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 37 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 115 [2022-11-16 16:15:06,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 38 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 132 [2022-11-16 16:15:06,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:06,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:06,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:06,991 INFO L321 Elim1Store]: treesize reduction 134, result has 6.9 percent of original size [2022-11-16 16:15:06,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 52 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 47 case distinctions, treesize of input 494 treesize of output 485 [2022-11-16 16:15:07,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-16 16:15:07,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:07,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:07,199 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:15:07,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 16:15:07,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:07,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:07,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:07,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:07,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:07,236 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-16 16:15:07,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 101 [2022-11-16 16:15:07,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:07,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:07,266 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:15:07,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 16:15:07,348 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:15:07,949 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1608#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= (+ |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 16:15:07,949 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:15:07,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:15:07,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2022-11-16 16:15:07,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840795697] [2022-11-16 16:15:07,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 16:15:07,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 16:15:07,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:15:07,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 16:15:07,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-11-16 16:15:07,951 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:15:08,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:15:08,521 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-11-16 16:15:08,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 16:15:08,522 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 16:15:08,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:15:08,523 INFO L225 Difference]: With dead ends: 54 [2022-11-16 16:15:08,523 INFO L226 Difference]: Without dead ends: 52 [2022-11-16 16:15:08,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 16:15:08,524 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 52 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:15:08,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 51 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 101 Invalid, 0 Unknown, 136 Unchecked, 0.1s Time] [2022-11-16 16:15:08,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-16 16:15:08,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 39. [2022-11-16 16:15:08,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.236842105263158) internal successors, (47), 38 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:15:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-11-16 16:15:08,542 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 14 [2022-11-16 16:15:08,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:15:08,543 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-11-16 16:15:08,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:15:08,543 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-11-16 16:15:08,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 16:15:08,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:15:08,544 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:15:08,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 16:15:08,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 16:15:08,759 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:15:08,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:15:08,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1968965520, now seen corresponding path program 6 times [2022-11-16 16:15:08,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:15:08,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110116768] [2022-11-16 16:15:08,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:15:08,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:15:08,794 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 16:15:08,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640560920] [2022-11-16 16:15:08,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:15:08,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:15:08,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:15:08,803 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:15:08,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 16:15:08,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:15:08,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:15:08,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-16 16:15:08,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:15:08,960 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 16:15:08,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 16:15:08,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 16:15:08,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 16:15:09,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:09,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-11-16 16:15:09,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 16:15:09,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 16:15:09,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:09,082 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 19 treesize of output 19 [2022-11-16 16:15:09,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 16:15:09,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 16:15:09,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 16:15:09,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 16:15:09,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:09,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 16:15:09,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:09,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 16:15:09,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:09,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 16:15:09,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:09,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 16:15:09,282 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 11 refuted. 3 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 16:15:09,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:15:11,404 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_467 Int) (v_ArrVal_465 Int) (|v_ULTIMATE.start_main_~i~0#1_186| Int) (|v_ULTIMATE.start_main_~i~0#1_185| Int) (v_ArrVal_468 Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_186|)) (= (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_465) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_186|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_467) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_185|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_468) |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_186| 1) |v_ULTIMATE.start_main_~i~0#1_185|)))) is different from false [2022-11-16 16:15:13,433 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_467 Int) (v_ArrVal_465 Int) (|v_ULTIMATE.start_main_~i~0#1_187| Int) (v_ArrVal_462 Int) (|v_ULTIMATE.start_main_~i~0#1_186| Int) (|v_ULTIMATE.start_main_~i~0#1_185| Int) (v_ArrVal_468 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_186| 1) |v_ULTIMATE.start_main_~i~0#1_185|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_187| 1) |v_ULTIMATE.start_main_~i~0#1_186|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_187|)) (= (select (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_462) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_187|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_465) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_186|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_467) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_185|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_468) |c_ULTIMATE.start_main_~b~0#1.offset|) 1))) is different from false [2022-11-16 16:15:13,648 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_461 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_461) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) is different from false [2022-11-16 16:15:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 11 not checked. [2022-11-16 16:15:13,665 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:15:13,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110116768] [2022-11-16 16:15:13,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 16:15:13,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640560920] [2022-11-16 16:15:13,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640560920] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:15:13,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [564435695] [2022-11-16 16:15:13,668 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-16 16:15:13,669 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:15:13,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:15:13,670 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:15:13,670 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:15:13,753 INFO L321 Elim1Store]: treesize reduction 66, result has 37.7 percent of original size [2022-11-16 16:15:13,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 133 [2022-11-16 16:15:13,880 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 16:15:13,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 16:15:13,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-16 16:15:13,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:13,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 38 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 132 [2022-11-16 16:15:14,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:14,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:14,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,129 INFO L321 Elim1Store]: treesize reduction 129, result has 10.4 percent of original size [2022-11-16 16:15:14,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 52 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 47 case distinctions, treesize of input 502 treesize of output 492 [2022-11-16 16:15:14,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-16 16:15:14,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:14,375 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:15:14,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 16:15:14,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:14,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:14,436 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-16 16:15:14,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 101 [2022-11-16 16:15:14,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:14,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:14,487 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:15:14,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 16:15:14,501 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:15:14,827 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1888#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= (+ |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 16:15:14,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:15:14,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:15:14,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2022-11-16 16:15:14,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183068209] [2022-11-16 16:15:14,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 16:15:14,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 16:15:14,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:15:14,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 16:15:14,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=348, Unknown=4, NotChecked=120, Total=552 [2022-11-16 16:15:14,829 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2022-11-16 16:15:17,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:15:17,305 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2022-11-16 16:15:17,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 16:15:17,305 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 16:15:17,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:15:17,306 INFO L225 Difference]: With dead ends: 59 [2022-11-16 16:15:17,306 INFO L226 Difference]: Without dead ends: 57 [2022-11-16 16:15:17,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=206, Invalid=844, Unknown=18, NotChecked=192, Total=1260 [2022-11-16 16:15:17,308 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:15:17,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 56 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 120 Invalid, 0 Unknown, 128 Unchecked, 0.1s Time] [2022-11-16 16:15:17,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-16 16:15:17,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2022-11-16 16:15:17,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:15:17,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-11-16 16:15:17,320 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 15 [2022-11-16 16:15:17,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:15:17,320 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-11-16 16:15:17,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2022-11-16 16:15:17,320 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-11-16 16:15:17,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 16:15:17,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:15:17,321 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 16:15:17,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 16:15:17,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:15:17,527 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:15:17,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:15:17,527 INFO L85 PathProgramCache]: Analyzing trace with hash 226857964, now seen corresponding path program 3 times [2022-11-16 16:15:17,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:15:17,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410732888] [2022-11-16 16:15:17,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:15:17,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:15:17,555 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 16:15:17,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374787419] [2022-11-16 16:15:17,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 16:15:17,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:15:17,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:15:17,566 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:15:17,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 16:15:17,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 16:15:17,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 16:15:17,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-16 16:15:17,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 16:15:17,688 INFO L321 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-11-16 16:15:17,689 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2022-11-16 16:15:17,693 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 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-16 16:15:17,720 INFO L321 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2022-11-16 16:15:17,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 68 [2022-11-16 16:15:17,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 16:15:17,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 16:15:17,811 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 23 treesize of output 16 [2022-11-16 16:15:17,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 16:15:17,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 16:15:17,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:17,888 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:15:17,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-16 16:15:17,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:17,928 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:15:17,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 16:15:17,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:17,960 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:15:17,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-11-16 16:15:18,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:18,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:18,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:18,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:18,011 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-11-16 16:15:18,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 58 [2022-11-16 16:15:18,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:18,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:18,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:18,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:18,068 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-11-16 16:15:18,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 73 [2022-11-16 16:15:18,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:18,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:18,117 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:15:18,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 44 [2022-11-16 16:15:18,346 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 16:15:18,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 52 treesize of output 32 [2022-11-16 16:15:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:15:18,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 16:15:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 16:15:19,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 16:15:19,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410732888] [2022-11-16 16:15:19,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 16:15:19,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374787419] [2022-11-16 16:15:19,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374787419] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 16:15:19,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2053854783] [2022-11-16 16:15:19,066 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-16 16:15:19,066 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 16:15:19,066 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 16:15:19,067 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 16:15:19,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 16:15:19,190 INFO L321 Elim1Store]: treesize reduction 136, result has 24.9 percent of original size [2022-11-16 16:15:19,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 44 treesize of output 77 [2022-11-16 16:15:19,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 37 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 115 [2022-11-16 16:15:19,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 43 [2022-11-16 16:15:19,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 38 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 132 [2022-11-16 16:15:19,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:19,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:19,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,463 INFO L321 Elim1Store]: treesize reduction 134, result has 6.9 percent of original size [2022-11-16 16:15:19,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 52 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 47 case distinctions, treesize of input 502 treesize of output 487 [2022-11-16 16:15:19,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-16 16:15:19,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,607 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:15:19,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-16 16:15:19,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:19,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:19,673 INFO L321 Elim1Store]: treesize reduction 119, result has 11.2 percent of original size [2022-11-16 16:15:19,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 92 treesize of output 109 [2022-11-16 16:15:19,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 16:15:19,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 16:15:19,711 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 16:15:19,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 39 [2022-11-16 16:15:19,770 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 16:15:20,289 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2185#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem13#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= (+ |ULTIMATE.start_main_~i~0#1| (* |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~i~0#1|) 1) |ULTIMATE.start_main_#t~mem13#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 16:15:20,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 16:15:20,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 16:15:20,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2022-11-16 16:15:20,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949944572] [2022-11-16 16:15:20,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 16:15:20,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 16:15:20,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 16:15:20,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 16:15:20,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-11-16 16:15:20,291 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:15:20,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 16:15:20,604 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-11-16 16:15:20,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 16:15:20,605 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 16:15:20,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 16:15:20,607 INFO L225 Difference]: With dead ends: 61 [2022-11-16 16:15:20,607 INFO L226 Difference]: Without dead ends: 59 [2022-11-16 16:15:20,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 16:15:20,608 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 16:15:20,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 23 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2022-11-16 16:15:20,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-16 16:15:20,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2022-11-16 16:15:20,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 46 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) [2022-11-16 16:15:20,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2022-11-16 16:15:20,623 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 16 [2022-11-16 16:15:20,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 16:15:20,624 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2022-11-16 16:15:20,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 16:15:20,624 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2022-11-16 16:15:20,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 16:15:20,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 16:15:20,625 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 16:15:20,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-16 16:15:20,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:15:20,830 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 16:15:20,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 16:15:20,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1399993040, now seen corresponding path program 4 times [2022-11-16 16:15:20,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 16:15:20,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639389423] [2022-11-16 16:15:20,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 16:15:20,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 16:15:20,845 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 16:15:20,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [107705643] [2022-11-16 16:15:20,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 16:15:20,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 16:15:20,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 16:15:20,847 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 16:15:20,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 16:15:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 16:15:20,947 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 16:15:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 16:15:20,991 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-16 16:15:20,991 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 16:15:20,992 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-16 16:15:21,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 16:15:21,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 16:15:21,197 INFO L444 BasicCegarLoop]: Path program histogram: [6, 4, 1, 1, 1, 1] [2022-11-16 16:15:21,199 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 16:15:21,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 04:15:21 BoogieIcfgContainer [2022-11-16 16:15:21,231 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 16:15:21,232 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 16:15:21,232 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 16:15:21,232 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 16:15:21,232 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 04:14:48" (3/4) ... [2022-11-16 16:15:21,234 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-16 16:15:21,293 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dfa0736b-8d2b-4d46-880d-f3cb792a5205/bin/utaipan-Xvt2sAort0/witness.graphml [2022-11-16 16:15:21,294 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 16:15:21,296 INFO L158 Benchmark]: Toolchain (without parser) took 33481.23ms. Allocated memory was 119.5MB in the beginning and 299.9MB in the end (delta: 180.4MB). Free memory was 80.8MB in the beginning and 105.7MB in the end (delta: -24.9MB). Peak memory consumption was 154.1MB. Max. memory is 16.1GB. [2022-11-16 16:15:21,298 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 119.5MB. Free memory is still 97.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 16:15:21,299 INFO L158 Benchmark]: CACSL2BoogieTranslator took 278.05ms. Allocated memory is still 119.5MB. Free memory was 80.7MB in the beginning and 94.5MB in the end (delta: -13.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 16:15:21,299 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.42ms. Allocated memory is still 119.5MB. Free memory was 94.5MB in the beginning and 92.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 16:15:21,299 INFO L158 Benchmark]: Boogie Preprocessor took 55.23ms. Allocated memory is still 119.5MB. Free memory was 92.4MB in the beginning and 91.3MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 16:15:21,300 INFO L158 Benchmark]: RCFGBuilder took 497.26ms. Allocated memory is still 119.5MB. Free memory was 91.3MB in the beginning and 76.6MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-16 16:15:21,300 INFO L158 Benchmark]: TraceAbstraction took 32519.28ms. Allocated memory was 119.5MB in the beginning and 299.9MB in the end (delta: 180.4MB). Free memory was 76.1MB in the beginning and 107.8MB in the end (delta: -31.7MB). Peak memory consumption was 150.3MB. Max. memory is 16.1GB. [2022-11-16 16:15:21,300 INFO L158 Benchmark]: Witness Printer took 62.02ms. Allocated memory is still 299.9MB. Free memory was 107.8MB in the beginning and 105.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 16:15:21,305 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 119.5MB. Free memory is still 97.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 278.05ms. Allocated memory is still 119.5MB. Free memory was 80.7MB in the beginning and 94.5MB in the end (delta: -13.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.42ms. Allocated memory is still 119.5MB. Free memory was 94.5MB in the beginning and 92.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.23ms. Allocated memory is still 119.5MB. Free memory was 92.4MB in the beginning and 91.3MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 497.26ms. Allocated memory is still 119.5MB. Free memory was 91.3MB in the beginning and 76.6MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 32519.28ms. Allocated memory was 119.5MB in the beginning and 299.9MB in the end (delta: 180.4MB). Free memory was 76.1MB in the beginning and 107.8MB in the end (delta: -31.7MB). Peak memory consumption was 150.3MB. Max. memory is 16.1GB. * Witness Printer took 62.02ms. Allocated memory is still 299.9MB. Free memory was 107.8MB in the beginning and 105.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 2 [L32] b[0] = 1 [L33] i=1 VAL [a={4:0}, b={5:0}, i=1, N=3] [L33] COND TRUE i