./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array6_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array6_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba --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 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 --- 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-b5237d8 [2022-11-22 01:57:25,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:57:25,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:57:25,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:57:25,363 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:57:25,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:57:25,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:57:25,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:57:25,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:57:25,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:57:25,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:57:25,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:57:25,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:57:25,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:57:25,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:57:25,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:57:25,396 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:57:25,397 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:57:25,399 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:57:25,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:57:25,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:57:25,410 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:57:25,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:57:25,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:57:25,418 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:57:25,423 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:57:25,423 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:57:25,424 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:57:25,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:57:25,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:57:25,428 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:57:25,429 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:57:25,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:57:25,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:57:25,433 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:57:25,433 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:57:25,434 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:57:25,434 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:57:25,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:57:25,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:57:25,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:57:25,437 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:57:25,476 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:57:25,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:57:25,477 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:57:25,478 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:57:25,478 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:57:25,479 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:57:25,479 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:57:25,479 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:57:25,479 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:57:25,479 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:57:25,480 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:57:25,481 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:57:25,481 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:57:25,481 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:57:25,481 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:57:25,482 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:57:25,482 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:57:25,482 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:57:25,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:57:25,483 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:57:25,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:57:25,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:57:25,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:57:25,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:57:25,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:57:25,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:57:25,485 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:57:25,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:57:25,485 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:57:25,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:57:25,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:57:25,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:57:25,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:57:25,487 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:57:25,487 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:57:25,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:57:25,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:57:25,487 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:57:25,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:57:25,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:57:25,488 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:57:25,488 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_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 [2022-11-22 01:57:25,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:57:25,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:57:25,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:57:25,812 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:57:25,813 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:57:25,814 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-patterns/array6_pattern.c [2022-11-22 01:57:28,879 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:57:29,083 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:57:29,083 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/sv-benchmarks/c/array-patterns/array6_pattern.c [2022-11-22 01:57:29,090 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/data/63baa13d9/8db65a5c494d4db98c955ba286f44b01/FLAGaa403d179 [2022-11-22 01:57:29,104 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/data/63baa13d9/8db65a5c494d4db98c955ba286f44b01 [2022-11-22 01:57:29,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:57:29,112 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:57:29,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:57:29,118 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:57:29,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:57:29,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:57:29" (1/1) ... [2022-11-22 01:57:29,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62833d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:29, skipping insertion in model container [2022-11-22 01:57:29,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:57:29" (1/1) ... [2022-11-22 01:57:29,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:57:29,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:57:29,290 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2022-11-22 01:57:29,308 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:57:29,315 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:57:29,326 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2022-11-22 01:57:29,336 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:57:29,349 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:57:29,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:29 WrapperNode [2022-11-22 01:57:29,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:57:29,351 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:57:29,352 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:57:29,352 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:57:29,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:29" (1/1) ... [2022-11-22 01:57:29,367 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:29" (1/1) ... [2022-11-22 01:57:29,392 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-11-22 01:57:29,392 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:57:29,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:57:29,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:57:29,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:57:29,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:29" (1/1) ... [2022-11-22 01:57:29,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:29" (1/1) ... [2022-11-22 01:57:29,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:29" (1/1) ... [2022-11-22 01:57:29,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:29" (1/1) ... [2022-11-22 01:57:29,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:29" (1/1) ... [2022-11-22 01:57:29,412 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:29" (1/1) ... [2022-11-22 01:57:29,413 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:29" (1/1) ... [2022-11-22 01:57:29,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:29" (1/1) ... [2022-11-22 01:57:29,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:57:29,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:57:29,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:57:29,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:57:29,418 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:29" (1/1) ... [2022-11-22 01:57:29,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:57:29,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:57:29,464 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:57:29,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:57:29,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:57:29,511 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 01:57:29,511 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 01:57:29,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:57:29,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:57:29,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:57:29,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:57:29,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:57:29,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:57:29,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:57:29,602 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:57:29,613 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:57:29,825 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:57:29,881 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:57:29,882 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-22 01:57:29,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:57:29 BoogieIcfgContainer [2022-11-22 01:57:29,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:57:29,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:57:29,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:57:29,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:57:29,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:57:29" (1/3) ... [2022-11-22 01:57:29,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7913ab99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:57:29, skipping insertion in model container [2022-11-22 01:57:29,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:57:29" (2/3) ... [2022-11-22 01:57:29,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7913ab99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:57:29, skipping insertion in model container [2022-11-22 01:57:29,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:57:29" (3/3) ... [2022-11-22 01:57:29,897 INFO L112 eAbstractionObserver]: Analyzing ICFG array6_pattern.c [2022-11-22 01:57:29,917 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:57:29,917 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:57:29,980 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:57:29,988 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;@79ff7338, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:57:29,989 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:57:29,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:57:30,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 01:57:30,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:57:30,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:57:30,007 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:57:30,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:57:30,016 INFO L85 PathProgramCache]: Analyzing trace with hash 857550697, now seen corresponding path program 1 times [2022-11-22 01:57:30,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:57:30,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107437559] [2022-11-22 01:57:30,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:57:30,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:57:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:57:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:57:30,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:57:30,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107437559] [2022-11-22 01:57:30,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107437559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:57:30,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:57:30,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:57:30,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407902542] [2022-11-22 01:57:30,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:57:30,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 01:57:30,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:57:30,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 01:57:30,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 01:57:30,305 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:57:30,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:57:30,339 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-11-22 01:57:30,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 01:57:30,360 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-22 01:57:30,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:57:30,367 INFO L225 Difference]: With dead ends: 24 [2022-11-22 01:57:30,367 INFO L226 Difference]: Without dead ends: 15 [2022-11-22 01:57:30,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 01:57:30,374 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:57:30,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:57:30,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-22 01:57:30,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-22 01:57:30,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:57:30,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-22 01:57:30,461 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2022-11-22 01:57:30,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:57:30,462 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-22 01:57:30,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 01:57:30,462 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-22 01:57:30,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 01:57:30,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:57:30,464 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:57:30,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:57:30,464 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:57:30,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:57:30,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1659101310, now seen corresponding path program 1 times [2022-11-22 01:57:30,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:57:30,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230213885] [2022-11-22 01:57:30,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:57:30,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:57:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:57:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:57:30,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:57:30,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230213885] [2022-11-22 01:57:30,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230213885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:57:30,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:57:30,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:57:30,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202673568] [2022-11-22 01:57:30,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:57:30,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:57:30,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:57:30,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:57:30,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:57:30,862 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:57:30,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:57:30,904 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-11-22 01:57:30,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:57:30,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-11-22 01:57:30,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:57:30,906 INFO L225 Difference]: With dead ends: 19 [2022-11-22 01:57:30,906 INFO L226 Difference]: Without dead ends: 16 [2022-11-22 01:57:30,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:57:30,908 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:57:30,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 28 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:57:30,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-22 01:57:30,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-22 01:57:30,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:57:30,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-22 01:57:30,914 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 16 [2022-11-22 01:57:30,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:57:30,914 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-22 01:57:30,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:57:30,915 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-22 01:57:30,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 01:57:30,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:57:30,916 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:57:30,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:57:30,916 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:57:30,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:57:30,917 INFO L85 PathProgramCache]: Analyzing trace with hash 107201699, now seen corresponding path program 1 times [2022-11-22 01:57:30,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:57:30,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694890993] [2022-11-22 01:57:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:57:30,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:57:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:57:31,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:57:31,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:57:31,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694890993] [2022-11-22 01:57:31,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694890993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:57:31,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:57:31,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:57:31,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018582246] [2022-11-22 01:57:31,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:57:31,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:57:31,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:57:31,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:57:31,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:57:31,045 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:57:31,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:57:31,110 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-11-22 01:57:31,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:57:31,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-11-22 01:57:31,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:57:31,112 INFO L225 Difference]: With dead ends: 29 [2022-11-22 01:57:31,112 INFO L226 Difference]: Without dead ends: 17 [2022-11-22 01:57:31,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:57:31,115 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:57:31,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 42 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:57:31,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-22 01:57:31,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-22 01:57:31,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:57:31,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-22 01:57:31,130 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 17 [2022-11-22 01:57:31,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:57:31,130 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-22 01:57:31,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:57:31,132 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-22 01:57:31,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 01:57:31,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:57:31,133 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:57:31,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:57:31,134 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:57:31,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:57:31,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1924715561, now seen corresponding path program 1 times [2022-11-22 01:57:31,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:57:31,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472169032] [2022-11-22 01:57:31,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:57:31,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:57:31,157 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:57:31,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045690100] [2022-11-22 01:57:31,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:57:31,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:57:31,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:57:31,162 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:57:31,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:57:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:57:31,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:57:31,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:57:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:57:31,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:57:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:57:31,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:57:31,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472169032] [2022-11-22 01:57:31,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:57:31,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045690100] [2022-11-22 01:57:31,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045690100] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:57:31,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1862659637] [2022-11-22 01:57:31,550 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:57:31,550 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:57:31,554 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:57:31,560 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:57:31,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:57:31,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:31,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:31,826 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:57:31,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:57:31,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:31,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:31,854 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 [2022-11-22 01:57:31,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:31,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:31,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:31,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-22 01:57:32,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:32,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:32,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:32,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:32,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:32,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:32,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:32,245 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-22 01:57:32,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-22 01:57:32,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:32,406 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-22 01:57:32,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-22 01:57:32,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:32,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:32,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:32,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:32,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:32,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:32,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:32,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:32,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:32,563 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-22 01:57:32,563 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-22 01:57:32,748 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-22 01:57:32,781 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:57:34,389 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '314#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-22 01:57:34,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:57:34,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:57:34,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-11-22 01:57:34,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104532281] [2022-11-22 01:57:34,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:57:34,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:57:34,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:57:34,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:57:34,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-11-22 01:57:34,392 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 01:57:34,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:57:34,648 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-11-22 01:57:34,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 01:57:34,649 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2022-11-22 01:57:34,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:57:34,650 INFO L225 Difference]: With dead ends: 49 [2022-11-22 01:57:34,651 INFO L226 Difference]: Without dead ends: 29 [2022-11-22 01:57:34,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-11-22 01:57:34,652 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:57:34,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 54 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:57:34,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-22 01:57:34,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2022-11-22 01:57:34,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:57:34,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-22 01:57:34,658 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 18 [2022-11-22 01:57:34,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:57:34,659 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-22 01:57:34,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 01:57:34,659 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-22 01:57:34,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 01:57:34,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:57:34,660 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:57:34,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:57:34,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:57:34,866 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:57:34,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:57:34,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1012202345, now seen corresponding path program 2 times [2022-11-22 01:57:34,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:57:34,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015644501] [2022-11-22 01:57:34,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:57:34,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:57:34,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:57:34,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307068551] [2022-11-22 01:57:34,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:57:34,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:57:34,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:57:34,887 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:57:34,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:57:34,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:57:34,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:57:34,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:57:34,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:57:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:57:35,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:57:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:57:35,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:57:35,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015644501] [2022-11-22 01:57:35,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:57:35,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307068551] [2022-11-22 01:57:35,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307068551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:57:35,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [122661276] [2022-11-22 01:57:35,130 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:57:35,130 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:57:35,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:57:35,131 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:57:35,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:57:35,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:35,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:35,256 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-22 01:57:35,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-22 01:57:35,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:35,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:35,362 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:57:35,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:57:35,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:35,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:35,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:35,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-22 01:57:35,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:35,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:35,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:35,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:35,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:35,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:35,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:35,582 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-22 01:57:35,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-22 01:57:35,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:35,684 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-22 01:57:35,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-22 01:57:35,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:35,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:35,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:35,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:35,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:35,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:35,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:35,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:35,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:35,779 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-22 01:57:35,779 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-22 01:57:35,917 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-22 01:57:35,944 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:57:37,374 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '570#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-22 01:57:37,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:57:37,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:57:37,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-22 01:57:37,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598918557] [2022-11-22 01:57:37,375 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:57:37,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 01:57:37,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:57:37,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 01:57:37,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-11-22 01:57:37,377 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 01:57:37,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:57:37,467 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-11-22 01:57:37,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:57:37,470 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2022-11-22 01:57:37,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:57:37,471 INFO L225 Difference]: With dead ends: 28 [2022-11-22 01:57:37,471 INFO L226 Difference]: Without dead ends: 25 [2022-11-22 01:57:37,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-11-22 01:57:37,472 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:57:37,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 43 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:57:37,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-22 01:57:37,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-22 01:57:37,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 01:57:37,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-22 01:57:37,479 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2022-11-22 01:57:37,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:57:37,479 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-22 01:57:37,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-22 01:57:37,480 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-22 01:57:37,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 01:57:37,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:57:37,480 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:57:37,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:57:37,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:57:37,691 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:57:37,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:57:37,691 INFO L85 PathProgramCache]: Analyzing trace with hash 2055356873, now seen corresponding path program 3 times [2022-11-22 01:57:37,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:57:37,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205652345] [2022-11-22 01:57:37,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:57:37,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:57:37,715 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:57:37,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009120769] [2022-11-22 01:57:37,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:57:37,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:57:37,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:57:37,721 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:57:37,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:57:37,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:57:37,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:57:37,890 WARN L261 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-22 01:57:37,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:57:37,922 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 [2022-11-22 01:57:37,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:37,966 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-22 01:57:37,972 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 20 treesize of output 20 [2022-11-22 01:57:37,976 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 [2022-11-22 01:57:37,983 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 [2022-11-22 01:57:38,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:38,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:38,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 52 [2022-11-22 01:57:38,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:38,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:38,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:38,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2022-11-22 01:57:38,570 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-22 01:57:38,571 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 330 treesize of output 213 [2022-11-22 01:57:38,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-22 01:57:38,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-22 01:57:38,673 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-11-22 01:57:38,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 174 treesize of output 217 [2022-11-22 01:57:38,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:38,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:38,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:38,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:38,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:38,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:38,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 124 [2022-11-22 01:57:38,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:38,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:38,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:38,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:38,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:38,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:38,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:38,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2022-11-22 01:57:38,814 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 38 treesize of output 11 [2022-11-22 01:57:38,833 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 156 treesize of output 132 [2022-11-22 01:57:38,854 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-22 01:57:38,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 52 [2022-11-22 01:57:38,863 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 17 treesize of output 11 [2022-11-22 01:57:39,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:39,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:39,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:39,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:39,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:39,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:39,420 INFO L321 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2022-11-22 01:57:39,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 122 treesize of output 54 [2022-11-22 01:57:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:57:39,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:57:39,705 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_219 (Array Int Int)) (v_ArrVal_213 (Array Int Int))) (= (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse1 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_219) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_213) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ (- 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3)) (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4))))))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 4) .cse3)))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|))))) 0)) (not (< 2 c_~ARR_SIZE~0))) is different from false [2022-11-22 01:57:39,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:57:39,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205652345] [2022-11-22 01:57:39,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:57:39,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009120769] [2022-11-22 01:57:39,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009120769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:57:39,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [753331759] [2022-11-22 01:57:39,924 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:57:39,924 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:57:39,924 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:57:39,924 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:57:39,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:57:39,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:39,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:40,081 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:57:40,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:57:40,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:40,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:40,100 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 [2022-11-22 01:57:40,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:40,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:40,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:40,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-22 01:57:40,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:40,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:40,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:40,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:40,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:40,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:40,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:40,275 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-22 01:57:40,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-22 01:57:40,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:40,370 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-22 01:57:40,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-22 01:57:40,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:40,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:40,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:40,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:40,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:40,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:40,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:40,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:40,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:40,454 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-22 01:57:40,454 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-22 01:57:40,535 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-22 01:57:40,558 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:57:42,217 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '788#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:57:42,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:57:42,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:57:42,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-11-22 01:57:42,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819037188] [2022-11-22 01:57:42,217 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-22 01:57:42,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-22 01:57:42,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:57:42,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-22 01:57:42,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1157, Unknown=2, NotChecked=70, Total=1406 [2022-11-22 01:57:42,219 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 18 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:57:43,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:57:43,013 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-11-22 01:57:43,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 01:57:43,016 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-11-22 01:57:43,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:57:43,017 INFO L225 Difference]: With dead ends: 45 [2022-11-22 01:57:43,018 INFO L226 Difference]: Without dead ends: 42 [2022-11-22 01:57:43,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=230, Invalid=1494, Unknown=2, NotChecked=80, Total=1806 [2022-11-22 01:57:43,019 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 49 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:57:43,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 92 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:57:43,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-22 01:57:43,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2022-11-22 01:57:43,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 01:57:43,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-11-22 01:57:43,034 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2022-11-22 01:57:43,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:57:43,034 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-11-22 01:57:43,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.125) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:57:43,035 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-11-22 01:57:43,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 01:57:43,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:57:43,035 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:57:43,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:57:43,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:57:43,242 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:57:43,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:57:43,242 INFO L85 PathProgramCache]: Analyzing trace with hash -708711620, now seen corresponding path program 4 times [2022-11-22 01:57:43,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:57:43,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438215350] [2022-11-22 01:57:43,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:57:43,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:57:43,268 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:57:43,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309252792] [2022-11-22 01:57:43,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:57:43,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:57:43,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:57:43,271 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:57:43,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:57:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:57:43,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:57:43,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:57:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:57:43,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:57:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:57:43,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:57:43,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438215350] [2022-11-22 01:57:43,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:57:43,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309252792] [2022-11-22 01:57:43,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309252792] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:57:43,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [393728392] [2022-11-22 01:57:43,567 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:57:43,567 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:57:43,567 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:57:43,567 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:57:43,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:57:43,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:43,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:43,678 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-22 01:57:43,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-22 01:57:43,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:43,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:43,774 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:57:43,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:57:43,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:43,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:43,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-22 01:57:43,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:43,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:43,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:43,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:43,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:43,999 INFO L321 Elim1Store]: treesize reduction 272, result has 16.3 percent of original size [2022-11-22 01:57:44,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 371 treesize of output 364 [2022-11-22 01:57:44,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:44,379 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-22 01:57:44,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-22 01:57:44,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:44,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:44,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:44,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:44,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:44,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:44,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:44,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:44,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:44,460 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-22 01:57:44,461 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-22 01:57:44,559 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-22 01:57:44,580 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:57:46,034 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1079#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-22 01:57:46,034 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:57:46,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:57:46,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-22 01:57:46,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064242328] [2022-11-22 01:57:46,035 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:57:46,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 01:57:46,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:57:46,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 01:57:46,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2022-11-22 01:57:46,036 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 01:57:46,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:57:46,212 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-11-22 01:57:46,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 01:57:46,213 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-11-22 01:57:46,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:57:46,214 INFO L225 Difference]: With dead ends: 57 [2022-11-22 01:57:46,214 INFO L226 Difference]: Without dead ends: 48 [2022-11-22 01:57:46,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2022-11-22 01:57:46,215 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:57:46,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 69 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:57:46,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-22 01:57:46,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-11-22 01:57:46,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 01:57:46,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-11-22 01:57:46,230 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 23 [2022-11-22 01:57:46,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:57:46,230 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-11-22 01:57:46,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 01:57:46,231 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-11-22 01:57:46,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 01:57:46,231 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:57:46,231 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:57:46,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:57:46,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:57:46,437 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:57:46,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:57:46,438 INFO L85 PathProgramCache]: Analyzing trace with hash -123210237, now seen corresponding path program 5 times [2022-11-22 01:57:46,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:57:46,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506502506] [2022-11-22 01:57:46,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:57:46,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:57:46,469 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:57:46,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327116025] [2022-11-22 01:57:46,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:57:46,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:57:46,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:57:46,474 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:57:46,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:57:46,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 01:57:46,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:57:46,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:57:46,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:57:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:57:46,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:57:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:57:46,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:57:46,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506502506] [2022-11-22 01:57:46,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:57:46,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327116025] [2022-11-22 01:57:46,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327116025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:57:46,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1138447289] [2022-11-22 01:57:46,846 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:57:46,846 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:57:46,846 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:57:46,847 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:57:46,847 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:57:46,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:46,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:46,949 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-22 01:57:46,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-22 01:57:46,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:46,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:47,045 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:57:47,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:57:47,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:47,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:47,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:47,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-22 01:57:47,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:47,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:47,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:47,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:47,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:47,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:47,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:47,256 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-22 01:57:47,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-22 01:57:47,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:47,344 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-22 01:57:47,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-22 01:57:47,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:47,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:47,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:47,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:47,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:47,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:47,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:47,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:47,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:47,421 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-22 01:57:47,421 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-22 01:57:47,520 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-22 01:57:47,544 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:57:48,972 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1401#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-22 01:57:48,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:57:48,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:57:48,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-22 01:57:48,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394085385] [2022-11-22 01:57:48,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:57:48,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 01:57:48,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:57:48,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 01:57:48,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-11-22 01:57:48,974 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 01:57:49,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:57:49,158 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2022-11-22 01:57:49,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 01:57:49,158 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-11-22 01:57:49,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:57:49,159 INFO L225 Difference]: With dead ends: 48 [2022-11-22 01:57:49,159 INFO L226 Difference]: Without dead ends: 45 [2022-11-22 01:57:49,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-11-22 01:57:49,160 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:57:49,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 47 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:57:49,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-22 01:57:49,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-11-22 01:57:49,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-22 01:57:49,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-11-22 01:57:49,184 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 23 [2022-11-22 01:57:49,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:57:49,186 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-11-22 01:57:49,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 01:57:49,186 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-11-22 01:57:49,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-22 01:57:49,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:57:49,188 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:57:49,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-22 01:57:49,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:57:49,400 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:57:49,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:57:49,400 INFO L85 PathProgramCache]: Analyzing trace with hash 475184706, now seen corresponding path program 6 times [2022-11-22 01:57:49,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:57:49,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257185277] [2022-11-22 01:57:49,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:57:49,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:57:49,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:57:49,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780719588] [2022-11-22 01:57:49,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:57:49,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:57:49,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:57:49,417 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:57:49,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:57:49,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:57:49,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:57:49,669 WARN L261 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-22 01:57:49,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:57:49,697 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 [2022-11-22 01:57:49,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:49,737 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-22 01:57:49,741 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 20 treesize of output 20 [2022-11-22 01:57:49,745 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 [2022-11-22 01:57:49,753 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 [2022-11-22 01:57:49,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:49,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:49,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:49,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 41 [2022-11-22 01:57:49,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:49,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:49,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:49,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:49,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:49,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:49,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:49,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:49,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:49,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:49,898 INFO L321 Elim1Store]: treesize reduction 42, result has 31.1 percent of original size [2022-11-22 01:57:49,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 99 treesize of output 82 [2022-11-22 01:57:49,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:49,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:49,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:49,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:49,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:49,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:49,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:49,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:49,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:50,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:50,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:50,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:50,016 INFO L321 Elim1Store]: treesize reduction 45, result has 22.4 percent of original size [2022-11-22 01:57:50,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 164 treesize of output 103 [2022-11-22 01:57:50,742 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-22 01:57:50,743 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 419 treesize of output 280 [2022-11-22 01:57:50,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-22 01:57:50,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-22 01:57:50,842 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-11-22 01:57:50,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 275 treesize of output 298 [2022-11-22 01:57:50,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:50,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:50,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:50,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:50,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:50,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:50,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:50,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:50,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:50,960 INFO L321 Elim1Store]: treesize reduction 154, result has 16.8 percent of original size [2022-11-22 01:57:50,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 171 treesize of output 227 [2022-11-22 01:57:50,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:50,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:50,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:51,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:51,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:51,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:51,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:51,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:51,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:51,060 INFO L321 Elim1Store]: treesize reduction 86, result has 19.6 percent of original size [2022-11-22 01:57:51,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 86 [2022-11-22 01:57:51,247 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-11-22 01:57:51,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 144 treesize of output 135 [2022-11-22 01:57:51,259 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 47 treesize of output 35 [2022-11-22 01:57:51,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:51,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:51,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:51,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:51,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:51,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:51,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:51,305 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:57:51,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 156 treesize of output 124 [2022-11-22 01:57:52,979 INFO L321 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2022-11-22 01:57:52,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 207 treesize of output 83 [2022-11-22 01:57:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:57:53,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:57:53,378 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_458 (Array Int Int)) (v_ArrVal_457 (Array Int Int))) (= (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse0 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_457) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_458) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4)) (select .cse4 (+ (- 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3))))))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 4) .cse3)))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse0 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) (select .cse1 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)))))) 0)) (not (< 3 c_~ARR_SIZE~0))) is different from false [2022-11-22 01:57:54,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:57:54,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257185277] [2022-11-22 01:57:54,934 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:57:54,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780719588] [2022-11-22 01:57:54,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780719588] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:57:54,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1502766357] [2022-11-22 01:57:54,936 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:57:54,936 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:57:54,936 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:57:54,936 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:57:54,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:57:54,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:54,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:55,054 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:57:55,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:57:55,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:55,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:55,073 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 [2022-11-22 01:57:55,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:55,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:55,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:55,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-22 01:57:55,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:55,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:55,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:55,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:55,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:55,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:55,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:55,259 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-22 01:57:55,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-22 01:57:55,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:55,356 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-22 01:57:55,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-22 01:57:55,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:55,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:55,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:55,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:55,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:55,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:55,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:55,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:55,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:55,435 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-22 01:57:55,435 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-22 01:57:55,557 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-22 01:57:55,578 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:57:57,581 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1694#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-22 01:57:57,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:57:57,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:57:57,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-11-22 01:57:57,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747728446] [2022-11-22 01:57:57,582 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-22 01:57:57,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 01:57:57,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:57:57,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 01:57:57,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1354, Unknown=3, NotChecked=76, Total=1640 [2022-11-22 01:57:57,584 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:57:58,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:57:58,945 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2022-11-22 01:57:58,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 01:57:58,946 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-11-22 01:57:58,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:57:58,946 INFO L225 Difference]: With dead ends: 61 [2022-11-22 01:57:58,947 INFO L226 Difference]: Without dead ends: 58 [2022-11-22 01:57:58,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=264, Invalid=1717, Unknown=3, NotChecked=86, Total=2070 [2022-11-22 01:57:58,948 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 51 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:57:58,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 116 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:57:58,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-22 01:57:58,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2022-11-22 01:57:58,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 01:57:58,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-11-22 01:57:58,972 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 24 [2022-11-22 01:57:58,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:57:58,973 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-11-22 01:57:58,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:57:58,973 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-11-22 01:57:58,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 01:57:58,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:57:58,974 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:57:58,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:57:59,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:57:59,179 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:57:59,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:57:59,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1845558755, now seen corresponding path program 7 times [2022-11-22 01:57:59,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:57:59,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021894422] [2022-11-22 01:57:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:57:59,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:57:59,202 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:57:59,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687058904] [2022-11-22 01:57:59,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:57:59,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:57:59,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:57:59,203 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:57:59,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:57:59,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:57:59,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 01:57:59,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:57:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:57:59,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:57:59,524 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:57:59,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:57:59,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021894422] [2022-11-22 01:57:59,524 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:57:59,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687058904] [2022-11-22 01:57:59,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687058904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:57:59,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1983102895] [2022-11-22 01:57:59,527 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:57:59,527 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:57:59,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:57:59,527 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:57:59,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:57:59,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:59,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:59,629 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:57:59,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:57:59,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:59,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:59,655 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 [2022-11-22 01:57:59,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:59,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:59,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:59,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-22 01:57:59,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:59,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:59,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:59,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:59,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:59,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:59,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:59,830 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-22 01:57:59,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-22 01:57:59,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:59,937 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-22 01:57:59,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-22 01:57:59,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:59,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:59,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:59,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:59,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:59,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:59,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:59,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:57:59,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:00,013 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-22 01:58:00,013 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-22 01:58:00,121 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-22 01:58:00,143 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:58:01,624 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2057#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-22 01:58:01,624 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:58:01,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:58:01,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-22 01:58:01,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393518078] [2022-11-22 01:58:01,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:58:01,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-22 01:58:01,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:01,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-22 01:58:01,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2022-11-22 01:58:01,627 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 01:58:01,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:01,969 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2022-11-22 01:58:01,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-22 01:58:01,970 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-11-22 01:58:01,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:01,971 INFO L225 Difference]: With dead ends: 81 [2022-11-22 01:58:01,971 INFO L226 Difference]: Without dead ends: 71 [2022-11-22 01:58:01,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2022-11-22 01:58:01,973 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 60 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:01,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 86 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:58:01,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-22 01:58:02,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2022-11-22 01:58:02,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 01:58:02,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2022-11-22 01:58:02,002 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 25 [2022-11-22 01:58:02,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:02,002 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2022-11-22 01:58:02,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 01:58:02,003 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2022-11-22 01:58:02,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 01:58:02,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:02,004 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:58:02,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:58:02,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 01:58:02,210 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:58:02,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:02,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1478734852, now seen corresponding path program 8 times [2022-11-22 01:58:02,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:02,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294560871] [2022-11-22 01:58:02,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:02,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:02,224 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:58:02,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028779210] [2022-11-22 01:58:02,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:58:02,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:58:02,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:58:02,226 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:58:02,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:58:02,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-22 01:58:02,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:58:02,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 01:58:02,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:58:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:02,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:58:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:58:02,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:02,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294560871] [2022-11-22 01:58:02,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:58:02,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028779210] [2022-11-22 01:58:02,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028779210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:58:02,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [176535729] [2022-11-22 01:58:02,726 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:58:02,726 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:58:02,726 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:58:02,726 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:58:02,727 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:58:02,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:02,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:02,838 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-22 01:58:02,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-22 01:58:02,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:02,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:02,946 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:58:02,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:58:02,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:02,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:02,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:02,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-22 01:58:03,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:03,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:03,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:03,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:03,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:03,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:03,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:03,103 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-22 01:58:03,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-22 01:58:03,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:03,193 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-22 01:58:03,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-22 01:58:03,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:03,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:03,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:03,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:03,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:03,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:03,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:03,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:03,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:03,272 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-22 01:58:03,272 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-22 01:58:03,350 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-22 01:58:03,370 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:58:04,573 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2469#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:58:04,573 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:58:04,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:58:04,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-11-22 01:58:04,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246221367] [2022-11-22 01:58:04,574 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:58:04,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-22 01:58:04,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:04,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-22 01:58:04,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-11-22 01:58:04,575 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 01:58:04,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:04,831 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2022-11-22 01:58:04,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 01:58:04,832 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-11-22 01:58:04,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:04,832 INFO L225 Difference]: With dead ends: 71 [2022-11-22 01:58:04,833 INFO L226 Difference]: Without dead ends: 68 [2022-11-22 01:58:04,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 01:58:04,834 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 58 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:04,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 116 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:58:04,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-22 01:58:04,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2022-11-22 01:58:04,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 01:58:04,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2022-11-22 01:58:04,862 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 25 [2022-11-22 01:58:04,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:04,862 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2022-11-22 01:58:04,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 01:58:04,863 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2022-11-22 01:58:04,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-22 01:58:04,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:04,864 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:58:04,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 01:58:05,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:58:05,071 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:58:05,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:05,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1403594601, now seen corresponding path program 9 times [2022-11-22 01:58:05,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:05,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381480684] [2022-11-22 01:58:05,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:05,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:05,083 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:58:05,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698316249] [2022-11-22 01:58:05,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:58:05,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:58:05,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:58:05,090 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:58:05,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 01:58:05,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:58:05,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:58:05,482 WARN L261 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 117 conjunts are in the unsatisfiable core [2022-11-22 01:58:05,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:58:05,522 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 [2022-11-22 01:58:05,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,560 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 47 [2022-11-22 01:58:05,566 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 44 treesize of output 44 [2022-11-22 01:58:05,572 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 19 treesize of output 16 [2022-11-22 01:58:05,581 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 21 treesize of output 19 [2022-11-22 01:58:05,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 41 [2022-11-22 01:58:05,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:05,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:05,751 INFO L321 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2022-11-22 01:58:05,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 71 [2022-11-22 01:58:05,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:05,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:05,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:05,875 INFO L321 Elim1Store]: treesize reduction 50, result has 27.5 percent of original size [2022-11-22 01:58:05,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 123 treesize of output 112 [2022-11-22 01:58:05,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:05,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:06,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:06,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:06,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:06,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:06,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:06,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:06,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:06,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:06,027 INFO L321 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2022-11-22 01:58:06,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 206 treesize of output 133 [2022-11-22 01:58:07,498 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-22 01:58:07,499 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 461 treesize of output 312 [2022-11-22 01:58:07,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-22 01:58:07,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-22 01:58:07,615 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-11-22 01:58:07,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 315 treesize of output 330 [2022-11-22 01:58:07,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:07,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:07,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:07,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:07,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:07,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:07,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:07,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:07,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:07,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:07,902 INFO L321 Elim1Store]: treesize reduction 109, result has 31.9 percent of original size [2022-11-22 01:58:07,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 108 treesize of output 165 [2022-11-22 01:58:07,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:07,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:07,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:07,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:07,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:07,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:07,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:07,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:07,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:07,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:08,089 INFO L321 Elim1Store]: treesize reduction 231, result has 16.6 percent of original size [2022-11-22 01:58:08,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 274 treesize of output 321 [2022-11-22 01:58:09,180 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-22 01:58:09,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1236 treesize of output 1145 [2022-11-22 01:58:09,261 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 29 treesize of output 23 [2022-11-22 01:58:13,019 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 01:58:13,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 364 treesize of output 270 [2022-11-22 01:58:13,155 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:58:13,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 18 case distinctions, treesize of input 294 treesize of output 392 [2022-11-22 01:58:13,340 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:58:13,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 373 treesize of output 395 [2022-11-22 01:58:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:20,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:58:20,961 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_740 (Array Int Int)) (v_ArrVal_741 (Array Int Int))) (= (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse0 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_740) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_741) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ (- 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3)) (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4))))))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 4) .cse3)))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ 16 |c_ULTIMATE.start_main_~#array2~0#1.offset|)) (select .cse1 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 16)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse0 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)))))) 0)) (not (< 4 c_~ARR_SIZE~0))) is different from false [2022-11-22 01:58:21,172 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:21,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381480684] [2022-11-22 01:58:21,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:58:21,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698316249] [2022-11-22 01:58:21,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698316249] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:58:21,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [975012370] [2022-11-22 01:58:21,174 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:58:21,174 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:58:21,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:58:21,175 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:58:21,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:58:21,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:21,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:21,276 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-22 01:58:21,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-22 01:58:21,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:21,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:21,366 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:58:21,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:58:21,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:21,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:21,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:21,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-22 01:58:21,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:21,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:21,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:21,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:21,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:21,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:21,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:21,550 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-22 01:58:21,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-22 01:58:21,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:21,643 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-22 01:58:21,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-22 01:58:21,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:21,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:21,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:21,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:21,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:21,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:21,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:21,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:21,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:21,718 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-22 01:58:21,718 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-22 01:58:21,793 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-22 01:58:21,814 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:58:23,959 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2837#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:58:23,959 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:58:23,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:58:23,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-11-22 01:58:23,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063722940] [2022-11-22 01:58:23,959 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-22 01:58:23,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 01:58:23,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:23,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 01:58:23,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1573, Unknown=1, NotChecked=82, Total=1892 [2022-11-22 01:58:23,962 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 22 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:58:26,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:26,320 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2022-11-22 01:58:26,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-22 01:58:26,320 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-11-22 01:58:26,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:26,321 INFO L225 Difference]: With dead ends: 79 [2022-11-22 01:58:26,321 INFO L226 Difference]: Without dead ends: 76 [2022-11-22 01:58:26,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=295, Invalid=1964, Unknown=1, NotChecked=92, Total=2352 [2022-11-22 01:58:26,323 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 71 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:26,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 145 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-22 01:58:26,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-22 01:58:26,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2022-11-22 01:58:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 52 states have internal predecessors, (61), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-22 01:58:26,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2022-11-22 01:58:26,364 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 26 [2022-11-22 01:58:26,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:26,364 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2022-11-22 01:58:26,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.1) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:58:26,365 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2022-11-22 01:58:26,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-22 01:58:26,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:26,366 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:58:26,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 01:58:26,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 01:58:26,572 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:58:26,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:26,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1777613253, now seen corresponding path program 1 times [2022-11-22 01:58:26,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:26,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080435577] [2022-11-22 01:58:26,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:26,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:26,589 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:58:26,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396879688] [2022-11-22 01:58:26,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:26,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:58:26,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:58:26,590 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:58:26,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 01:58:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:26,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-22 01:58:26,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:58:26,801 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 [2022-11-22 01:58:26,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:26,831 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-22 01:58:26,835 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 20 treesize of output 20 [2022-11-22 01:58:26,839 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 [2022-11-22 01:58:26,846 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 [2022-11-22 01:58:26,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:26,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:26,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 41 [2022-11-22 01:58:26,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:26,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:26,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:26,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2022-11-22 01:58:27,389 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-22 01:58:27,390 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 146 treesize of output 103 [2022-11-22 01:58:27,399 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 38 treesize of output 41 [2022-11-22 01:58:27,432 INFO L321 Elim1Store]: treesize reduction 55, result has 8.3 percent of original size [2022-11-22 01:58:27,432 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 84 treesize of output 93 [2022-11-22 01:58:27,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:27,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:27,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:27,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 44 [2022-11-22 01:58:27,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:27,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:27,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:27,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:27,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:27,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:27,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:27,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2022-11-22 01:58:27,494 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 28 treesize of output 17 [2022-11-22 01:58:27,499 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 17 treesize of output 11 [2022-11-22 01:58:28,025 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-22 01:58:28,026 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 368 treesize of output 245 [2022-11-22 01:58:28,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-22 01:58:28,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-22 01:58:28,097 INFO L321 Elim1Store]: treesize reduction 111, result has 8.3 percent of original size [2022-11-22 01:58:28,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 174 treesize of output 221 [2022-11-22 01:58:28,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:28,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:28,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:28,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:28,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:28,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:28,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 124 [2022-11-22 01:58:28,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:28,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:28,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:28,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:28,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:28,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:28,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:28,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 49 [2022-11-22 01:58:28,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:28,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 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 251 treesize of output 219 [2022-11-22 01:58:28,398 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 29 treesize of output 23 [2022-11-22 01:58:28,499 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 29 treesize of output 23 [2022-11-22 01:58:28,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:28,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:28,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:28,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:28,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:28,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:28,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:28,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:28,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:28,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:28,903 INFO L321 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2022-11-22 01:58:28,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 142 treesize of output 58 [2022-11-22 01:58:28,951 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:28,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:58:30,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:30,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080435577] [2022-11-22 01:58:30,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:58:30,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396879688] [2022-11-22 01:58:30,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396879688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:58:30,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1577633292] [2022-11-22 01:58:30,058 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:58:30,058 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:58:30,058 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:58:30,059 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:58:30,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:58:30,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,155 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-22 01:58:30,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-22 01:58:30,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,240 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:58:30,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:58:30,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:30,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-22 01:58:30,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:30,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:30,384 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-22 01:58:30,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-22 01:58:30,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:30,480 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-22 01:58:30,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-22 01:58:30,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:30,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:30,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:30,561 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-22 01:58:30,561 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-22 01:58:30,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:30,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:30,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:30,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:30,640 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-22 01:58:30,640 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-22 01:58:30,728 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-22 01:58:30,748 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:58:32,796 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3232#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2022-11-22 01:58:32,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:58:32,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:58:32,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-11-22 01:58:32,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804610680] [2022-11-22 01:58:32,797 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-22 01:58:32,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 01:58:32,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:32,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 01:58:32,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1550, Unknown=8, NotChecked=0, Total=1722 [2022-11-22 01:58:32,798 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 22 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 01:58:34,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:34,704 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2022-11-22 01:58:34,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 01:58:34,705 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2022-11-22 01:58:34,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:34,706 INFO L225 Difference]: With dead ends: 75 [2022-11-22 01:58:34,706 INFO L226 Difference]: Without dead ends: 55 [2022-11-22 01:58:34,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=296, Invalid=2347, Unknown=9, NotChecked=0, Total=2652 [2022-11-22 01:58:34,708 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:34,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 131 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:58:34,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-22 01:58:34,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-11-22 01:58:34,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 01:58:34,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-11-22 01:58:34,744 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 28 [2022-11-22 01:58:34,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:34,744 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-11-22 01:58:34,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-22 01:58:34,744 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-11-22 01:58:34,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 01:58:34,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:34,745 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:58:34,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 01:58:34,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 01:58:34,950 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:58:34,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:34,950 INFO L85 PathProgramCache]: Analyzing trace with hash 561494428, now seen corresponding path program 10 times [2022-11-22 01:58:34,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:34,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298158139] [2022-11-22 01:58:34,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:34,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:34,962 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:58:34,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464066329] [2022-11-22 01:58:34,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:58:34,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:58:34,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:58:34,964 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:58:34,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 01:58:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:58:35,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:58:35,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:58:35,245 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:35,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:58:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:58:35,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:35,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298158139] [2022-11-22 01:58:35,368 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:58:35,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464066329] [2022-11-22 01:58:35,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464066329] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:58:35,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1707258477] [2022-11-22 01:58:35,370 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:58:35,370 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:58:35,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:58:35,370 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:58:35,371 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:58:35,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:35,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:35,473 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-22 01:58:35,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-22 01:58:35,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:35,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:35,572 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:58:35,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:58:35,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:35,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:35,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:35,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-22 01:58:35,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:35,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:35,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:35,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:35,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:35,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:35,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:35,745 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-22 01:58:35,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-22 01:58:35,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:35,853 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-22 01:58:35,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-22 01:58:35,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:35,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:35,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:35,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:35,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:35,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:35,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:35,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:35,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:35,927 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-22 01:58:35,927 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-22 01:58:36,002 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-22 01:58:36,023 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:58:37,314 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3648#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:58:37,314 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:58:37,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:58:37,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-11-22 01:58:37,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118745299] [2022-11-22 01:58:37,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:58:37,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 01:58:37,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:37,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 01:58:37,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 01:58:37,316 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 01:58:37,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:37,721 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2022-11-22 01:58:37,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-22 01:58:37,722 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-11-22 01:58:37,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:37,722 INFO L225 Difference]: With dead ends: 86 [2022-11-22 01:58:37,722 INFO L226 Difference]: Without dead ends: 75 [2022-11-22 01:58:37,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=381, Invalid=1781, Unknown=0, NotChecked=0, Total=2162 [2022-11-22 01:58:37,723 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 75 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:37,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 86 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:58:37,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-22 01:58:37,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2022-11-22 01:58:37,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 01:58:37,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2022-11-22 01:58:37,764 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 27 [2022-11-22 01:58:37,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:37,764 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2022-11-22 01:58:37,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 01:58:37,764 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2022-11-22 01:58:37,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 01:58:37,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:37,765 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:58:37,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 01:58:37,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 01:58:37,970 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:58:37,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:37,971 INFO L85 PathProgramCache]: Analyzing trace with hash 587607715, now seen corresponding path program 11 times [2022-11-22 01:58:37,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:37,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490134808] [2022-11-22 01:58:37,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:37,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:37,983 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:58:37,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2091687135] [2022-11-22 01:58:37,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:58:37,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:58:37,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:58:37,985 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:58:37,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 01:58:38,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-22 01:58:38,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:58:38,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:58:38,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:58:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:38,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:58:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:58:38,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:38,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490134808] [2022-11-22 01:58:38,592 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:58:38,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091687135] [2022-11-22 01:58:38,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091687135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:58:38,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1984079379] [2022-11-22 01:58:38,594 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:58:38,594 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:58:38,594 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:58:38,594 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:58:38,594 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:58:38,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:38,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:38,701 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-22 01:58:38,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-22 01:58:38,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:38,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:38,802 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:58:38,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:58:38,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:38,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:38,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:38,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-22 01:58:38,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:38,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:38,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:38,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:38,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:38,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:38,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:38,973 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-22 01:58:38,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-22 01:58:39,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:39,062 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-22 01:58:39,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-22 01:58:39,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:39,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:39,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:39,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:39,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:39,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:39,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:39,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:39,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:39,138 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-22 01:58:39,138 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-22 01:58:39,208 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-22 01:58:39,229 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:58:40,440 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4095#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:58:40,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:58:40,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:58:40,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-11-22 01:58:40,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086638273] [2022-11-22 01:58:40,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:58:40,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 01:58:40,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:40,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 01:58:40,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 01:58:40,442 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 01:58:40,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:40,741 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2022-11-22 01:58:40,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-22 01:58:40,742 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-11-22 01:58:40,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:40,743 INFO L225 Difference]: With dead ends: 75 [2022-11-22 01:58:40,743 INFO L226 Difference]: Without dead ends: 72 [2022-11-22 01:58:40,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=267, Invalid=1373, Unknown=0, NotChecked=0, Total=1640 [2022-11-22 01:58:40,744 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:40,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 110 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:58:40,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-22 01:58:40,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2022-11-22 01:58:40,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-22 01:58:40,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2022-11-22 01:58:40,786 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 27 [2022-11-22 01:58:40,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:40,787 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2022-11-22 01:58:40,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-22 01:58:40,787 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2022-11-22 01:58:40,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-22 01:58:40,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:40,788 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:58:40,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 01:58:40,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 01:58:40,994 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:58:40,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:40,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1035704738, now seen corresponding path program 12 times [2022-11-22 01:58:40,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:40,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315137116] [2022-11-22 01:58:40,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:40,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:41,007 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:58:41,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [436492006] [2022-11-22 01:58:41,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:58:41,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:58:41,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:58:41,009 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:58:41,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 01:58:41,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:58:41,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:58:41,420 WARN L261 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 137 conjunts are in the unsatisfiable core [2022-11-22 01:58:41,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:58:41,450 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 [2022-11-22 01:58:41,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,481 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-22 01:58:41,486 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 20 treesize of output 20 [2022-11-22 01:58:41,489 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 [2022-11-22 01:58:41,496 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 [2022-11-22 01:58:41,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 56 [2022-11-22 01:58:41,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:41,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:41,628 INFO L321 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2022-11-22 01:58:41,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 71 [2022-11-22 01:58:41,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:41,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:41,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:41,750 INFO L321 Elim1Store]: treesize reduction 50, result has 27.5 percent of original size [2022-11-22 01:58:41,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 123 treesize of output 112 [2022-11-22 01:58:41,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:41,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:41,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:41,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:41,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:41,896 INFO L321 Elim1Store]: treesize reduction 58, result has 24.7 percent of original size [2022-11-22 01:58:41,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 162 treesize of output 157 [2022-11-22 01:58:42,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:42,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:42,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:42,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:42,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:42,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:42,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:42,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:42,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:42,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:42,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:42,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:42,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:42,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:42,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:42,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:42,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:42,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:42,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:42,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:42,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:42,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:42,264 INFO L321 Elim1Store]: treesize reduction 61, result has 17.6 percent of original size [2022-11-22 01:58:42,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 46 case distinctions, treesize of input 248 treesize of output 163 [2022-11-22 01:58:43,428 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-22 01:58:43,428 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 503 treesize of output 344 [2022-11-22 01:58:43,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-22 01:58:43,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-22 01:58:43,529 INFO L321 Elim1Store]: treesize reduction 116, result has 4.1 percent of original size [2022-11-22 01:58:43,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 355 treesize of output 362 [2022-11-22 01:58:43,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:43,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:43,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:43,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:43,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:43,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:43,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:43,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:43,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:43,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:43,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:43,780 INFO L321 Elim1Store]: treesize reduction 308, result has 16.5 percent of original size [2022-11-22 01:58:43,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 235 treesize of output 289 [2022-11-22 01:58:43,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:43,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:43,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:43,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:43,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:43,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:43,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:43,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:43,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:43,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:43,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:43,960 INFO L321 Elim1Store]: treesize reduction 152, result has 28.6 percent of original size [2022-11-22 01:58:43,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 69 treesize of output 132 [2022-11-22 01:58:44,116 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2022-11-22 01:58:44,143 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 43 treesize of output 31 [2022-11-22 01:58:49,845 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-22 01:58:49,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 874 treesize of output 754 [2022-11-22 01:58:49,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 749 treesize of output 673 [2022-11-22 01:58:49,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 770 treesize of output 872 [2022-11-22 01:58:50,503 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 7 treesize of output 5 [2022-11-22 01:58:50,650 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 7 treesize of output 5 [2022-11-22 01:58:50,715 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 7 treesize of output 5 [2022-11-22 01:58:50,779 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 7 treesize of output 5 [2022-11-22 01:58:50,834 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 7 treesize of output 5 [2022-11-22 01:58:50,873 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 7 treesize of output 5 [2022-11-22 01:58:50,949 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 7 treesize of output 5 [2022-11-22 01:58:51,003 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 7 treesize of output 5 [2022-11-22 01:58:51,044 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 7 treesize of output 5 [2022-11-22 01:58:51,085 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 7 treesize of output 5 [2022-11-22 01:58:51,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 206 [2022-11-22 01:58:51,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 207 treesize of output 127 [2022-11-22 01:58:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:58:51,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:58:52,386 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1179 (Array Int Int)) (v_ArrVal_1178 (Array Int Int))) (= (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse0 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_1179) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_1178) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4)) (select .cse4 (+ (- 4) |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3))))))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| (- 4) .cse3)))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 20)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse0 (+ 16 |c_ULTIMATE.start_main_~#array2~0#1.offset|)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 20)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 16)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse1 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse0 |c_ULTIMATE.start_main_~#array2~0#1.offset|))))) 0)) (not (< 5 c_~ARR_SIZE~0))) is different from false [2022-11-22 01:58:52,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:58:52,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315137116] [2022-11-22 01:58:52,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:58:52,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436492006] [2022-11-22 01:58:52,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436492006] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:58:52,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1472195205] [2022-11-22 01:58:52,914 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:58:52,914 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:58:52,914 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:58:52,915 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:58:52,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:58:52,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:52,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:53,005 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-22 01:58:53,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 57 [2022-11-22 01:58:53,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:53,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:53,099 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:58:53,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2022-11-22 01:58:53,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:53,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:53,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:53,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 56 [2022-11-22 01:58:53,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:53,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:53,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:53,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:53,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:53,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:53,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:53,283 INFO L321 Elim1Store]: treesize reduction 150, result has 15.3 percent of original size [2022-11-22 01:58:53,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 393 treesize of output 374 [2022-11-22 01:58:53,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:53,373 INFO L321 Elim1Store]: treesize reduction 22, result has 51.1 percent of original size [2022-11-22 01:58:53,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-11-22 01:58:53,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:53,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:53,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:53,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:53,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:53,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:58:53,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:53,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:53,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:58:53,444 INFO L321 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2022-11-22 01:58:53,445 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 5 case distinctions, treesize of input 99 treesize of output 75 [2022-11-22 01:58:53,511 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2022-11-22 01:58:53,530 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:58:55,893 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4491#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (not (< |ULTIMATE.start_main_~count~0#1| ~ARR_SIZE~0)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:58:55,894 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:58:55,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:58:55,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-11-22 01:58:55,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497838151] [2022-11-22 01:58:55,894 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-22 01:58:55,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 01:58:55,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:58:55,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 01:58:55,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1804, Unknown=3, NotChecked=88, Total=2162 [2022-11-22 01:58:55,896 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand has 24 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:58:59,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:58:59,345 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2022-11-22 01:58:59,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 01:58:59,347 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-22 01:58:59,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:58:59,348 INFO L225 Difference]: With dead ends: 83 [2022-11-22 01:58:59,348 INFO L226 Difference]: Without dead ends: 80 [2022-11-22 01:58:59,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=328, Invalid=2223, Unknown=3, NotChecked=98, Total=2652 [2022-11-22 01:58:59,350 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 67 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:58:59,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 145 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-22 01:58:59,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-22 01:58:59,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2022-11-22 01:58:59,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 55 states have internal predecessors, (64), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-22 01:58:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2022-11-22 01:58:59,391 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 28 [2022-11-22 01:58:59,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:58:59,392 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2022-11-22 01:58:59,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 01:58:59,392 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2022-11-22 01:58:59,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-22 01:58:59,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:58:59,392 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:58:59,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 01:58:59,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 01:58:59,593 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:58:59,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:58:59,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1177873296, now seen corresponding path program 2 times [2022-11-22 01:58:59,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:58:59,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966927198] [2022-11-22 01:58:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:58:59,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:58:59,606 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:58:59,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297746082] [2022-11-22 01:58:59,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:58:59,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:58:59,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:58:59,607 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:58:59,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4918a83a-c319-43bc-a565-a6439bc267af/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 01:59:00,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-22 01:59:00,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:59:00,123 WARN L261 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 119 conjunts are in the unsatisfiable core [2022-11-22 01:59:00,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:00,139 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 [2022-11-22 01:59:00,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:00,170 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 47 [2022-11-22 01:59:00,176 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 21 treesize of output 19 [2022-11-22 01:59:00,179 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 42 treesize of output 39 [2022-11-22 01:59:00,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:00,229 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 82 [2022-11-22 01:59:00,235 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 62 treesize of output 60 [2022-11-22 01:59:00,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 41 treesize of output 44 [2022-11-22 01:59:00,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 36 treesize of output 38 [2022-11-22 01:59:00,356 INFO L321 Elim1Store]: treesize reduction 39, result has 11.4 percent of original size [2022-11-22 01:59:00,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 173 treesize of output 147 [2022-11-22 01:59:00,366 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 52 treesize of output 53 [2022-11-22 01:59:00,404 INFO L321 Elim1Store]: treesize reduction 56, result has 8.2 percent of original size [2022-11-22 01:59:00,404 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 96 treesize of output 105 [2022-11-22 01:59:00,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 59 [2022-11-22 01:59:00,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 68 [2022-11-22 01:59:00,499 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-22 01:59:00,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 75 [2022-11-22 01:59:00,524 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 14 treesize of output 7 [2022-11-22 01:59:00,656 INFO L321 Elim1Store]: treesize reduction 33, result has 13.2 percent of original size [2022-11-22 01:59:00,656 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 163 treesize of output 139 [2022-11-22 01:59:00,664 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 48 treesize of output 49 [2022-11-22 01:59:00,685 INFO L321 Elim1Store]: treesize reduction 54, result has 8.5 percent of original size [2022-11-22 01:59:00,686 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 94 treesize of output 101 [2022-11-22 01:59:00,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 66 [2022-11-22 01:59:00,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 66 [2022-11-22 01:59:01,393 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-22 01:59:01,394 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 427 treesize of output 304 [2022-11-22 01:59:01,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2022-11-22 01:59:01,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 151 [2022-11-22 01:59:01,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 250 [2022-11-22 01:59:01,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,554 INFO L321 Elim1Store]: treesize reduction 159, result has 14.1 percent of original size [2022-11-22 01:59:01,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 108 treesize of output 191 [2022-11-22 01:59:01,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:01,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-11-22 01:59:01,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,678 INFO L321 Elim1Store]: treesize reduction 81, result has 24.3 percent of original size [2022-11-22 01:59:01,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 130 [2022-11-22 01:59:01,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:01,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 112 [2022-11-22 01:59:01,841 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 88 treesize of output 50 [2022-11-22 01:59:01,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 83 treesize of output 60 [2022-11-22 01:59:01,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:02,011 INFO L321 Elim1Store]: treesize reduction 57, result has 5.0 percent of original size [2022-11-22 01:59:02,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 68 [2022-11-22 01:59:02,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:02,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:02,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:02,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 52 [2022-11-22 01:59:04,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:04,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:04,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:04,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:04,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:04,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:04,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:04,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:04,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:04,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:04,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:04,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:04,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:05,900 INFO L321 Elim1Store]: treesize reduction 1027, result has 31.2 percent of original size [2022-11-22 01:59:05,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 21 select indices, 21 select index equivalence classes, 20 disjoint index pairs (out of 210 index pairs), introduced 21 new quantified variables, introduced 102 case distinctions, treesize of input 358 treesize of output 646 [2022-11-22 01:59:27,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:27,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:00:23,824 WARN L233 SmtUtils]: Spent 56.47s on a formula simplification. DAG size of input: 1921 DAG size of output: 868 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-22 02:00:23,828 INFO L321 Elim1Store]: treesize reduction 7488, result has 32.9 percent of original size [2022-11-22 02:00:23,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 43 select indices, 43 select index equivalence classes, 6 disjoint index pairs (out of 903 index pairs), introduced 43 new quantified variables, introduced 903 case distinctions, treesize of input 565 treesize of output 3853