./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array5_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/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_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array5_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/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_4efb9e24-e0a2-4c27-a36b-59f85aed5611/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 3dd3ea9d30e76cbd39a744e53feb2b89c359b5b85c7df24161ceaf060cda3b02 --- 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 01:47:02,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:47:02,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:47:02,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:47:02,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:47:02,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:47:02,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:47:02,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:47:02,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:47:02,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:47:02,995 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:47:02,996 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:47:02,996 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:47:02,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:47:02,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:47:03,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:47:03,001 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:47:03,002 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:47:03,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:47:03,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:47:03,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:47:03,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:47:03,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:47:03,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:47:03,032 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:47:03,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:47:03,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:47:03,034 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:47:03,035 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:47:03,036 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:47:03,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:47:03,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:47:03,039 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:47:03,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:47:03,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:47:03,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:47:03,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:47:03,044 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:47:03,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:47:03,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:47:03,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:47:03,047 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:47:03,093 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:47:03,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:47:03,094 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:47:03,094 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:47:03,095 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:47:03,095 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:47:03,096 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:47:03,096 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:47:03,096 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:47:03,096 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:47:03,097 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:47:03,098 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:47:03,098 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:47:03,098 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:47:03,098 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:47:03,099 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:47:03,099 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:47:03,099 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:47:03,100 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:47:03,100 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:47:03,100 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:47:03,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:47:03,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:47:03,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:47:03,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:47:03,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:47:03,101 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:47:03,102 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:47:03,102 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:47:03,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:47:03,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:47:03,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:47:03,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:47:03,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:47:03,103 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:47:03,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:47:03,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:47:03,104 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:47:03,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:47:03,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:47:03,105 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:47:03,105 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_4efb9e24-e0a2-4c27-a36b-59f85aed5611/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3dd3ea9d30e76cbd39a744e53feb2b89c359b5b85c7df24161ceaf060cda3b02 [2022-11-22 01:47:03,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:47:03,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:47:03,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:47:03,435 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:47:03,435 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:47:03,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/array-patterns/array5_pattern.c [2022-11-22 01:47:06,539 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:47:06,874 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:47:06,875 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/sv-benchmarks/c/array-patterns/array5_pattern.c [2022-11-22 01:47:06,883 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/data/92b397415/7cff5de2a44e41e78543812e0f83dab9/FLAG8a6a4e161 [2022-11-22 01:47:06,904 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/data/92b397415/7cff5de2a44e41e78543812e0f83dab9 [2022-11-22 01:47:06,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:47:06,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:47:06,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:47:06,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:47:06,916 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:47:06,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:47:06" (1/1) ... [2022-11-22 01:47:06,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15739396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:06, skipping insertion in model container [2022-11-22 01:47:06,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:47:06" (1/1) ... [2022-11-22 01:47:06,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:47:06,947 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:47:07,104 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_4efb9e24-e0a2-4c27-a36b-59f85aed5611/sv-benchmarks/c/array-patterns/array5_pattern.c[1890,1903] [2022-11-22 01:47:07,125 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:47:07,136 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:47:07,150 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_4efb9e24-e0a2-4c27-a36b-59f85aed5611/sv-benchmarks/c/array-patterns/array5_pattern.c[1890,1903] [2022-11-22 01:47:07,179 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:47:07,200 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:47:07,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:07 WrapperNode [2022-11-22 01:47:07,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:47:07,202 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:47:07,202 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:47:07,203 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:47:07,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:07" (1/1) ... [2022-11-22 01:47:07,217 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:07" (1/1) ... [2022-11-22 01:47:07,237 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2022-11-22 01:47:07,238 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:47:07,238 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:47:07,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:47:07,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:47:07,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:07" (1/1) ... [2022-11-22 01:47:07,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:07" (1/1) ... [2022-11-22 01:47:07,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:07" (1/1) ... [2022-11-22 01:47:07,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:07" (1/1) ... [2022-11-22 01:47:07,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:07" (1/1) ... [2022-11-22 01:47:07,275 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:07" (1/1) ... [2022-11-22 01:47:07,285 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:07" (1/1) ... [2022-11-22 01:47:07,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:07" (1/1) ... [2022-11-22 01:47:07,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:47:07,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:47:07,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:47:07,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:47:07,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:07" (1/1) ... [2022-11-22 01:47:07,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:47:07,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:47:07,330 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:47:07,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:47:07,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:47:07,377 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 01:47:07,377 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 01:47:07,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:47:07,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:47:07,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:47:07,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:47:07,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:47:07,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:47:07,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:47:07,449 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:47:07,453 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:47:07,780 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:47:07,912 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:47:07,913 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-22 01:47:07,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:47:07 BoogieIcfgContainer [2022-11-22 01:47:07,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:47:07,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:47:07,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:47:07,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:47:07,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:47:06" (1/3) ... [2022-11-22 01:47:07,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43381a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:47:07, skipping insertion in model container [2022-11-22 01:47:07,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:47:07" (2/3) ... [2022-11-22 01:47:07,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43381a53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:47:07, skipping insertion in model container [2022-11-22 01:47:07,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:47:07" (3/3) ... [2022-11-22 01:47:07,940 INFO L112 eAbstractionObserver]: Analyzing ICFG array5_pattern.c [2022-11-22 01:47:07,962 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:47:07,962 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:47:08,025 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:47:08,036 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;@27a5179e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:47:08,036 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:47:08,041 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 01:47:08,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 01:47:08,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:47:08,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:47:08,051 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:47:08,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:47:08,060 INFO L85 PathProgramCache]: Analyzing trace with hash 959661797, now seen corresponding path program 1 times [2022-11-22 01:47:08,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:47:08,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662557816] [2022-11-22 01:47:08,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:47:08,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:47:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:47:08,348 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 01:47:08,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:47:08,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662557816] [2022-11-22 01:47:08,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662557816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:47:08,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:47:08,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:47:08,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376468712] [2022-11-22 01:47:08,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:47:08,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-22 01:47:08,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:47:08,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-22 01:47:08,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-22 01:47:08,392 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 01:47:08,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:47:08,460 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-11-22 01:47:08,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-22 01:47:08,463 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 01:47:08,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:47:08,471 INFO L225 Difference]: With dead ends: 24 [2022-11-22 01:47:08,471 INFO L226 Difference]: Without dead ends: 15 [2022-11-22 01:47:08,474 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 01:47:08,478 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:47:08,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:47:08,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-22 01:47:08,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-22 01:47:08,511 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 01:47:08,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2022-11-22 01:47:08,513 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2022-11-22 01:47:08,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:47:08,514 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2022-11-22 01:47:08,514 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 01:47:08,514 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2022-11-22 01:47:08,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 01:47:08,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:47:08,516 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:47:08,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:47:08,516 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:47:08,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:47:08,517 INFO L85 PathProgramCache]: Analyzing trace with hash 156202947, now seen corresponding path program 1 times [2022-11-22 01:47:08,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:47:08,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222929786] [2022-11-22 01:47:08,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:47:08,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:47:08,550 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:47:08,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236519011] [2022-11-22 01:47:08,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:47:08,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:47:08,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:47:08,555 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:47:08,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:47:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:47:08,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:47:08,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:47:08,791 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 01:47:08,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:47:08,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:47:08,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222929786] [2022-11-22 01:47:08,793 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:47:08,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236519011] [2022-11-22 01:47:08,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236519011] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:47:08,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:47:08,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:47:08,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675385558] [2022-11-22 01:47:08,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:47:08,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:47:08,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:47:08,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:47:08,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:47:08,802 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 01:47:08,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:47:08,861 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-11-22 01:47:08,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:47:08,862 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 01:47:08,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:47:08,863 INFO L225 Difference]: With dead ends: 19 [2022-11-22 01:47:08,863 INFO L226 Difference]: Without dead ends: 16 [2022-11-22 01:47:08,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 01:47:08,865 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:47:08,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 26 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:47:08,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-22 01:47:08,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-22 01:47:08,870 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 01:47:08,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-22 01:47:08,871 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 16 [2022-11-22 01:47:08,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:47:08,872 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-22 01:47:08,872 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 01:47:08,873 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-22 01:47:08,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 01:47:08,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:47:08,874 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:47:08,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:47:09,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:47:09,081 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:47:09,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:47:09,082 INFO L85 PathProgramCache]: Analyzing trace with hash 547086701, now seen corresponding path program 1 times [2022-11-22 01:47:09,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:47:09,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495063867] [2022-11-22 01:47:09,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:47:09,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:47:09,129 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:47:09,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114268018] [2022-11-22 01:47:09,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:47:09,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:47:09,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:47:09,136 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:47:09,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:47:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:47:09,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:47:09,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:47:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:47:09,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:47:09,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:47:09,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495063867] [2022-11-22 01:47:09,366 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:47:09,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114268018] [2022-11-22 01:47:09,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114268018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:47:09,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:47:09,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:47:09,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852635618] [2022-11-22 01:47:09,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:47:09,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:47:09,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:47:09,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:47:09,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:47:09,373 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 01:47:09,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:47:09,470 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-11-22 01:47:09,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:47:09,470 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 17 [2022-11-22 01:47:09,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:47:09,471 INFO L225 Difference]: With dead ends: 29 [2022-11-22 01:47:09,472 INFO L226 Difference]: Without dead ends: 17 [2022-11-22 01:47:09,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:47:09,473 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:47:09,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 38 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:47:09,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-22 01:47:09,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-22 01:47:09,478 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 01:47:09,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-22 01:47:09,479 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 17 [2022-11-22 01:47:09,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:47:09,479 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-22 01:47:09,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 01:47:09,480 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-22 01:47:09,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 01:47:09,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:47:09,481 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 01:47:09,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-22 01:47:09,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:47:09,687 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:47:09,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:47:09,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1616883104, now seen corresponding path program 1 times [2022-11-22 01:47:09,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:47:09,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489883944] [2022-11-22 01:47:09,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:47:09,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:47:09,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:47:09,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783206224] [2022-11-22 01:47:09,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:47:09,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:47:09,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:47:09,737 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:47:09,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:47:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:47:09,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-22 01:47:09,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:47:09,964 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 01:47:10,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:47:10,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:10,392 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 27 treesize of output 31 [2022-11-22 01:47:10,406 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 28 treesize of output 28 [2022-11-22 01:47:10,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-22 01:47:10,433 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 12 treesize of output 13 [2022-11-22 01:47:10,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:10,690 INFO L321 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2022-11-22 01:47:10,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 24 [2022-11-22 01:47:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:47:10,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:47:10,932 INFO L321 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2022-11-22 01:47:10,933 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 8 case distinctions, treesize of input 98 treesize of output 127 [2022-11-22 01:47:11,040 INFO L321 Elim1Store]: treesize reduction 61, result has 45.0 percent of original size [2022-11-22 01:47:11,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 102 treesize of output 151 [2022-11-22 01:47:11,077 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:47:11,077 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 1 case distinctions, treesize of input 15 treesize of output 14 [2022-11-22 01:47:11,196 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:47:11,197 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 1 case distinctions, treesize of input 15 treesize of output 14 [2022-11-22 01:47:11,427 INFO L321 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2022-11-22 01:47:11,428 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 131 treesize of output 135 [2022-11-22 01:47:11,469 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 01:47:11,490 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:47:11,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 15 [2022-11-22 01:47:11,619 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:47:11,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 79 [2022-11-22 01:47:11,905 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:47:11,906 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 2 case distinctions, treesize of input 56 treesize of output 92 [2022-11-22 01:47:12,011 INFO L321 Elim1Store]: treesize reduction 63, result has 1.6 percent of original size [2022-11-22 01:47:12,012 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 2 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 51 [2022-11-22 01:47:12,047 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:47:12,047 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 252 treesize of output 226 [2022-11-22 01:47:12,139 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:47:12,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 161 treesize of output 187 [2022-11-22 01:47:13,179 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:47:13,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 161 treesize of output 151 [2022-11-22 01:47:13,208 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:47:13,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 136 treesize of output 132 [2022-11-22 01:47:14,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:47:14,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:47:14,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489883944] [2022-11-22 01:47:14,133 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:47:14,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783206224] [2022-11-22 01:47:14,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783206224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:47:14,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1674098885] [2022-11-22 01:47:14,152 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:47:14,153 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:47:14,156 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:47:14,162 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:47:14,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:47:14,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:14,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:14,318 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:47:14,319 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 01:47:14,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:14,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:14,338 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 01:47:14,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:14,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:14,377 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 01:47:14,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:14,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:14,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:14,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:14,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:14,607 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-22 01:47:14,608 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 355 treesize of output 353 [2022-11-22 01:47:14,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:14,843 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:47:14,843 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 42 treesize of output 25 [2022-11-22 01:47:14,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:14,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:14,934 INFO L321 Elim1Store]: treesize reduction 17, result has 50.0 percent of original size [2022-11-22 01:47:14,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 29 [2022-11-22 01:47:14,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:14,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:14,970 INFO L321 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2022-11-22 01:47:14,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2022-11-22 01:47:15,050 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2022-11-22 01:47:15,073 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:47:17,686 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '422#(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 01:47:17,686 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:47:17,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:47:17,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2022-11-22 01:47:17,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6927093] [2022-11-22 01:47:17,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:47:17,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 01:47:17,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:47:17,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 01:47:17,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2022-11-22 01:47:17,690 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 22 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-22 01:47:20,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:47:20,806 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-11-22 01:47:20,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-22 01:47:20,807 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2022-11-22 01:47:20,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:47:20,807 INFO L225 Difference]: With dead ends: 55 [2022-11-22 01:47:20,808 INFO L226 Difference]: Without dead ends: 51 [2022-11-22 01:47:20,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=408, Invalid=2454, Unknown=0, NotChecked=0, Total=2862 [2022-11-22 01:47:20,812 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 113 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:47:20,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 100 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:47:20,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-22 01:47:20,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2022-11-22 01:47:20,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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 01:47:20,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-11-22 01:47:20,836 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 18 [2022-11-22 01:47:20,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:47:20,837 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-11-22 01:47:20,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.368421052631579) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-22 01:47:20,837 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-11-22 01:47:20,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 01:47:20,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:47:20,838 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:47:20,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:47:21,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:47:21,048 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:47:21,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:47:21,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1416468688, now seen corresponding path program 2 times [2022-11-22 01:47:21,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:47:21,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690345614] [2022-11-22 01:47:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:47:21,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:47:21,077 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:47:21,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636422463] [2022-11-22 01:47:21,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:47:21,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:47:21,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:47:21,080 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:47:21,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:47:21,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:47:21,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:47:21,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 01:47:21,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:47:21,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:47:21,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:47:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:47:21,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:47:21,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690345614] [2022-11-22 01:47:21,293 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:47:21,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636422463] [2022-11-22 01:47:21,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636422463] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:47:21,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [951443868] [2022-11-22 01:47:21,299 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:47:21,300 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:47:21,300 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:47:21,300 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:47:21,300 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:47:21,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:21,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:21,410 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:47:21,411 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 01:47:21,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:21,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:21,434 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 01:47:21,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:21,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:21,466 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 57 treesize of output 45 [2022-11-22 01:47:21,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:21,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:21,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:21,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:21,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:21,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:21,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:21,635 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-22 01:47:21,636 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 362 treesize of output 348 [2022-11-22 01:47:21,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:21,721 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:47:21,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2022-11-22 01:47:21,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:21,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:21,801 INFO L321 Elim1Store]: treesize reduction 17, result has 50.0 percent of original size [2022-11-22 01:47:21,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 29 [2022-11-22 01:47:21,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:21,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:21,842 INFO L321 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2022-11-22 01:47:21,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2022-11-22 01:47:21,924 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2022-11-22 01:47:21,946 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:47:23,808 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '713#(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 01:47:23,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:47:23,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:47:23,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-22 01:47:23,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071095877] [2022-11-22 01:47:23,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:47:23,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:47:23,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:47:23,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:47:23,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-11-22 01:47:23,810 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 01:47:23,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:47:23,948 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-11-22 01:47:23,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:47:23,949 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 19 [2022-11-22 01:47:23,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:47:23,950 INFO L225 Difference]: With dead ends: 43 [2022-11-22 01:47:23,950 INFO L226 Difference]: Without dead ends: 27 [2022-11-22 01:47:23,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-11-22 01:47:23,952 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:47:23,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 45 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:47:23,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-22 01:47:23,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2022-11-22 01:47:23,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) 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 01:47:23,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-11-22 01:47:23,958 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 19 [2022-11-22 01:47:23,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:47:23,958 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-11-22 01:47:23,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 01:47:23,959 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-11-22 01:47:23,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 01:47:23,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:47:23,964 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:47:23,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:47:24,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:47:24,171 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:47:24,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:47:24,171 INFO L85 PathProgramCache]: Analyzing trace with hash 420833229, now seen corresponding path program 3 times [2022-11-22 01:47:24,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:47:24,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112472132] [2022-11-22 01:47:24,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:47:24,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:47:24,203 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:47:24,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999544084] [2022-11-22 01:47:24,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:47:24,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:47:24,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:47:24,205 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:47:24,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:47:24,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:47:24,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:47:24,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 01:47:24,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:47:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:47:24,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:47:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:47:24,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:47:24,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112472132] [2022-11-22 01:47:24,416 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:47:24,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999544084] [2022-11-22 01:47:24,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999544084] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:47:24,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [320957435] [2022-11-22 01:47:24,418 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:47:24,419 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:47:24,419 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:47:24,419 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:47:24,419 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:47:24,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:24,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:24,529 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:47:24,530 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 01:47:24,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:24,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:24,561 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 01:47:24,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:24,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:24,602 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 01:47:24,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:24,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:24,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:24,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:24,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:24,814 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-22 01:47:24,815 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 355 treesize of output 353 [2022-11-22 01:47:25,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:25,093 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:47:25,094 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 42 treesize of output 25 [2022-11-22 01:47:25,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:25,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:25,174 INFO L321 Elim1Store]: treesize reduction 17, result has 50.0 percent of original size [2022-11-22 01:47:25,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 29 [2022-11-22 01:47:25,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:25,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:25,212 INFO L321 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2022-11-22 01:47:25,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2022-11-22 01:47:25,294 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2022-11-22 01:47:25,338 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:47:27,182 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '943#(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 01:47:27,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:47:27,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:47:27,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-22 01:47:27,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646712580] [2022-11-22 01:47:27,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:47:27,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:47:27,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:47:27,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:47:27,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-11-22 01:47:27,184 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 01:47:27,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:47:27,308 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-11-22 01:47:27,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:47:27,309 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 19 [2022-11-22 01:47:27,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:47:27,310 INFO L225 Difference]: With dead ends: 27 [2022-11-22 01:47:27,310 INFO L226 Difference]: Without dead ends: 24 [2022-11-22 01:47:27,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-11-22 01:47:27,311 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:47:27,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 27 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:47:27,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-22 01:47:27,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2022-11-22 01:47:27,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 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 01:47:27,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-22 01:47:27,324 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 19 [2022-11-22 01:47:27,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:47:27,324 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-22 01:47:27,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 01:47:27,327 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-22 01:47:27,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 01:47:27,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:47:27,329 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:47:27,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:47:27,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:47:27,535 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:47:27,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:47:27,536 INFO L85 PathProgramCache]: Analyzing trace with hash 160690851, now seen corresponding path program 4 times [2022-11-22 01:47:27,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:47:27,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485628236] [2022-11-22 01:47:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:47:27,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:47:27,573 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:47:27,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40091317] [2022-11-22 01:47:27,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:47:27,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:47:27,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:47:27,585 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:47:27,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:47:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:47:27,707 WARN L261 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-22 01:47:27,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:47:27,732 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 01:47:27,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:27,774 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 01:47:27,779 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 01:47:27,784 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 01:47:27,792 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 01:47:27,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:27,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:27,841 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 48 treesize of output 39 [2022-11-22 01:47:28,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:28,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:28,383 INFO L321 Elim1Store]: treesize reduction 128, result has 46.9 percent of original size [2022-11-22 01:47:28,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 125 treesize of output 216 [2022-11-22 01:47:28,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:28,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 69 [2022-11-22 01:47:28,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:28,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:28,748 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:47:28,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 34 [2022-11-22 01:47:28,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:28,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:28,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:47:28,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2022-11-22 01:47:30,530 INFO L321 Elim1Store]: treesize reduction 216, result has 34.3 percent of original size [2022-11-22 01:47:30,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 286 treesize of output 302 [2022-11-22 01:47:30,576 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:47:30,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 191 treesize of output 196 [2022-11-22 01:47:30,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:47:30,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 167 treesize of output 184 [2022-11-22 01:47:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:47:31,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:47:36,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:47:36,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485628236] [2022-11-22 01:47:36,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:47:36,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40091317] [2022-11-22 01:47:36,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40091317] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:47:36,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [729314768] [2022-11-22 01:47:36,256 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:47:36,256 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:47:36,256 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:47:36,257 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:47:36,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:47:36,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:36,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:36,395 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:47:36,396 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 01:47:36,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:36,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:36,417 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 01:47:36,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:36,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:36,454 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 01:47:36,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:36,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:36,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:36,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:36,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:36,681 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-22 01:47:36,681 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 355 treesize of output 353 [2022-11-22 01:47:36,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:36,987 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:47:36,988 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 42 treesize of output 25 [2022-11-22 01:47:37,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:37,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:37,072 INFO L321 Elim1Store]: treesize reduction 17, result has 50.0 percent of original size [2022-11-22 01:47:37,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 29 [2022-11-22 01:47:37,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:37,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:37,118 INFO L321 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2022-11-22 01:47:37,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2022-11-22 01:47:37,200 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2022-11-22 01:47:37,227 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:47:39,869 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1140#(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 01:47:39,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:47:39,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:47:39,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-11-22 01:47:39,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044897295] [2022-11-22 01:47:39,870 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-22 01:47:39,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 01:47:39,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:47:39,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 01:47:39,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1054, Unknown=1, NotChecked=0, Total=1190 [2022-11-22 01:47:39,875 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 16 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 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 01:47:41,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:47:41,166 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-11-22 01:47:41,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 01:47:41,167 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 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 20 [2022-11-22 01:47:41,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:47:41,169 INFO L225 Difference]: With dead ends: 36 [2022-11-22 01:47:41,169 INFO L226 Difference]: Without dead ends: 33 [2022-11-22 01:47:41,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=201, Invalid=1518, Unknown=3, NotChecked=0, Total=1722 [2022-11-22 01:47:41,171 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 46 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 16 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:47:41,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 63 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 147 Invalid, 3 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:47:41,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-22 01:47:41,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-11-22 01:47:41,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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 01:47:41,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-11-22 01:47:41,191 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 20 [2022-11-22 01:47:41,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:47:41,191 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-11-22 01:47:41,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 13 states have internal predecessors, (16), 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 01:47:41,192 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-11-22 01:47:41,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 01:47:41,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:47:41,193 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:47:41,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:47:41,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:47:41,399 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:47:41,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:47:41,400 INFO L85 PathProgramCache]: Analyzing trace with hash 686211725, now seen corresponding path program 5 times [2022-11-22 01:47:41,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:47:41,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763801910] [2022-11-22 01:47:41,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:47:41,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:47:41,430 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:47:41,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71534555] [2022-11-22 01:47:41,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:47:41,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:47:41,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:47:41,432 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:47:41,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:47:41,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:47:41,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:47:41,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:47:41,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:47:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:47:41,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:47:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:47:41,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:47:41,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763801910] [2022-11-22 01:47:41,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:47:41,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71534555] [2022-11-22 01:47:41,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71534555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:47:41,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [683743059] [2022-11-22 01:47:41,713 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:47:41,713 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:47:41,714 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:47:41,714 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:47:41,714 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:47:41,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:41,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:41,836 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:47:41,837 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 01:47:41,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:41,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:41,857 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 01:47:41,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:41,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:41,890 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 01:47:42,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:42,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:42,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:42,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:42,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:42,108 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-22 01:47:42,108 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 355 treesize of output 353 [2022-11-22 01:47:42,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:42,485 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:47:42,485 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 42 treesize of output 25 [2022-11-22 01:47:42,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:42,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:42,568 INFO L321 Elim1Store]: treesize reduction 17, result has 50.0 percent of original size [2022-11-22 01:47:42,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 29 [2022-11-22 01:47:42,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:42,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:47:42,609 INFO L321 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2022-11-22 01:47:42,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2022-11-22 01:47:42,685 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2022-11-22 01:47:42,710 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:47:44,616 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1398#(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 01:47:44,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:47:44,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:47:44,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-22 01:47:44,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987031572] [2022-11-22 01:47:44,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:47:44,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 01:47:44,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:47:44,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 01:47:44,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-11-22 01:47:44,619 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 01:47:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:47:44,904 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2022-11-22 01:47:44,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 01:47:44,904 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 21 [2022-11-22 01:47:44,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:47:44,906 INFO L225 Difference]: With dead ends: 74 [2022-11-22 01:47:44,906 INFO L226 Difference]: Without dead ends: 66 [2022-11-22 01:47:44,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2022-11-22 01:47:44,907 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 71 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:47:44,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 63 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:47:44,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-22 01:47:44,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2022-11-22 01:47:44,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 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 01:47:44,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-11-22 01:47:44,933 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 21 [2022-11-22 01:47:44,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:47:44,933 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-11-22 01:47:44,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 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 01:47:44,934 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-11-22 01:47:44,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 01:47:44,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:47:44,935 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 01:47:44,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:47:45,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:47:45,141 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:47:45,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:47:45,142 INFO L85 PathProgramCache]: Analyzing trace with hash 213073216, now seen corresponding path program 6 times [2022-11-22 01:47:45,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:47:45,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908225723] [2022-11-22 01:47:45,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:47:45,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:47:45,170 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:47:45,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [466629937] [2022-11-22 01:47:45,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:47:45,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:47:45,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:47:45,176 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:47:45,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:47:45,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:47:45,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:47:45,338 WARN L261 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-22 01:47:45,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:47:45,383 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 01:47:45,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:45,429 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 01:47:45,435 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 01:47:45,441 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 01:47:45,450 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 01:47:45,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:45,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:45,509 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 57 treesize of output 45 [2022-11-22 01:47:45,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:45,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:45,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:45,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:45,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 63 [2022-11-22 01:47:46,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:46,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:46,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:46,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:46,421 INFO L321 Elim1Store]: treesize reduction 196, result has 46.9 percent of original size [2022-11-22 01:47:46,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 143 treesize of output 282 [2022-11-22 01:47:47,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:47,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 95 [2022-11-22 01:47:47,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:47,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:47,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:47,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:47,151 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:47:47,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 43 [2022-11-22 01:47:47,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:47,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:47,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:47,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:47,194 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:47:47,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 41 [2022-11-22 01:47:50,648 INFO L321 Elim1Store]: treesize reduction 288, result has 35.9 percent of original size [2022-11-22 01:47:50,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 384 treesize of output 408 [2022-11-22 01:47:50,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:50,703 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:47:50,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 258 treesize of output 259 [2022-11-22 01:47:50,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:47:50,741 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:47:50,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 238 treesize of output 249 [2022-11-22 01:47:56,804 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 01:47:56,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:48:07,940 WARN L233 SmtUtils]: Spent 5.78s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:48:07,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:48:07,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908225723] [2022-11-22 01:48:07,941 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:48:07,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466629937] [2022-11-22 01:48:07,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466629937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:48:07,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [533413327] [2022-11-22 01:48:07,944 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:48:07,944 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:48:07,944 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:48:07,945 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:48:07,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:48:07,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:07,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:08,068 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:48:08,069 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 01:48:08,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:08,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:08,089 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 01:48:08,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:08,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:08,131 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 01:48:08,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:08,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:08,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:48:08,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:48:08,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:48:08,329 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-22 01:48:08,329 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 355 treesize of output 353 [2022-11-22 01:48:08,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:48:08,608 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:48:08,608 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 42 treesize of output 25 [2022-11-22 01:48:08,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:08,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:48:08,711 INFO L321 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2022-11-22 01:48:08,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2022-11-22 01:48:08,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:08,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:48:08,758 INFO L321 Elim1Store]: treesize reduction 17, result has 50.0 percent of original size [2022-11-22 01:48:08,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 29 [2022-11-22 01:48:08,845 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2022-11-22 01:48:08,870 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:48:12,597 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1720#(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 01:48:12,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:48:12,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:48:12,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-11-22 01:48:12,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188609371] [2022-11-22 01:48:12,598 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-22 01:48:12,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-22 01:48:12,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:48:12,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-22 01:48:12,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1238, Unknown=4, NotChecked=0, Total=1406 [2022-11-22 01:48:12,600 INFO L87 Difference]: Start difference. First operand 46 states and 51 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 01:48:14,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:48:14,277 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-11-22 01:48:14,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 01:48:14,278 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 01:48:14,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:48:14,279 INFO L225 Difference]: With dead ends: 54 [2022-11-22 01:48:14,279 INFO L226 Difference]: Without dead ends: 51 [2022-11-22 01:48:14,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=203, Invalid=1514, Unknown=5, NotChecked=0, Total=1722 [2022-11-22 01:48:14,280 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 18 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:48:14,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 103 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 262 Invalid, 5 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:48:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-22 01:48:14,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2022-11-22 01:48:14,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 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 01:48:14,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2022-11-22 01:48:14,327 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 22 [2022-11-22 01:48:14,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:48:14,327 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2022-11-22 01:48:14,328 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 01:48:14,328 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2022-11-22 01:48:14,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 01:48:14,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:48:14,331 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 01:48:14,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 01:48:14,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:48:14,539 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:48:14,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:48:14,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1984902256, now seen corresponding path program 7 times [2022-11-22 01:48:14,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:48:14,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295051654] [2022-11-22 01:48:14,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:48:14,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:48:14,580 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:48:14,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [214831347] [2022-11-22 01:48:14,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:48:14,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:48:14,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:48:14,607 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:48:14,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 01:48:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:48:14,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:48:14,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:48:14,845 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 01:48:14,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:48:14,942 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 01:48:14,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:48:14,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295051654] [2022-11-22 01:48:14,943 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-22 01:48:14,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214831347] [2022-11-22 01:48:14,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214831347] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:48:14,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [194708738] [2022-11-22 01:48:14,944 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-22 01:48:14,945 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:48:14,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:48:14,945 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:48:14,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:48:14,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:14,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:15,059 INFO L321 Elim1Store]: treesize reduction 80, result has 29.8 percent of original size [2022-11-22 01:48:15,059 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 01:48:15,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:15,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:15,166 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-22 01:48:15,167 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 01:48:15,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:15,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:15,203 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 57 treesize of output 45 [2022-11-22 01:48:15,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:15,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:15,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:15,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:15,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:48:15,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:15,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:48:15,335 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-22 01:48:15,335 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 362 treesize of output 348 [2022-11-22 01:48:15,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:48:15,442 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:48:15,442 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 42 treesize of output 25 [2022-11-22 01:48:15,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:15,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:48:15,515 INFO L321 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2022-11-22 01:48:15,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2022-11-22 01:48:15,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:15,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:48:15,552 INFO L321 Elim1Store]: treesize reduction 17, result has 50.0 percent of original size [2022-11-22 01:48:15,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 29 [2022-11-22 01:48:15,617 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 70 for LOIs [2022-11-22 01:48:15,636 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:48:17,420 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2046#(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 01:48:17,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:48:17,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:48:17,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-22 01:48:17,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138553155] [2022-11-22 01:48:17,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 01:48:17,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 01:48:17,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:48:17,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 01:48:17,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-11-22 01:48:17,422 INFO L87 Difference]: Start difference. First operand 47 states and 52 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 01:48:18,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:48:18,010 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2022-11-22 01:48:18,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 01:48:18,010 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 01:48:18,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:48:18,012 INFO L225 Difference]: With dead ends: 124 [2022-11-22 01:48:18,012 INFO L226 Difference]: Without dead ends: 115 [2022-11-22 01:48:18,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 01:48:18,014 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 86 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:48:18,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 118 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:48:18,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-22 01:48:18,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 64. [2022-11-22 01:48:18,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 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 01:48:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-11-22 01:48:18,069 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 23 [2022-11-22 01:48:18,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:48:18,069 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-11-22 01:48:18,070 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 01:48:18,070 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-11-22 01:48:18,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-22 01:48:18,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:48:18,071 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 01:48:18,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 01:48:18,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:48:18,276 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:48:18,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:48:18,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1404476029, now seen corresponding path program 8 times [2022-11-22 01:48:18,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:48:18,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484804480] [2022-11-22 01:48:18,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:48:18,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:48:18,297 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-22 01:48:18,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299800984] [2022-11-22 01:48:18,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:48:18,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:48:18,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:48:18,299 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:48:18,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4efb9e24-e0a2-4c27-a36b-59f85aed5611/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 01:48:18,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-22 01:48:18,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:48:18,558 WARN L261 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-22 01:48:18,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:48:18,593 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 01:48:18,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:18,629 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 29 treesize of output 33 [2022-11-22 01:48:18,634 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 30 treesize of output 30 [2022-11-22 01:48:18,638 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 13 treesize of output 12 [2022-11-22 01:48:18,658 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 13 treesize of output 12 [2022-11-22 01:48:18,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:18,733 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 54 treesize of output 53 [2022-11-22 01:48:18,740 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 42 treesize of output 40 [2022-11-22 01:48:18,745 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 24 treesize of output 28 [2022-11-22 01:48:18,761 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 24 treesize of output 28 [2022-11-22 01:48:18,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:18,840 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 56 treesize of output 51 [2022-11-22 01:48:18,854 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 40 treesize of output 36 [2022-11-22 01:48:18,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:18,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:18,864 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 23 treesize of output 32 [2022-11-22 01:48:18,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:18,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:18,886 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 23 treesize of output 32 [2022-11-22 01:48:18,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:18,974 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 78 treesize of output 69 [2022-11-22 01:48:18,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:18,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:19,038 INFO L321 Elim1Store]: treesize reduction 64, result has 28.9 percent of original size [2022-11-22 01:48:19,038 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 3 case distinctions, treesize of input 32 treesize of output 46 [2022-11-22 01:48:19,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:19,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:19,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:19,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:19,099 INFO L321 Elim1Store]: treesize reduction 94, result has 21.7 percent of original size [2022-11-22 01:48:19,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 94 [2022-11-22 01:48:19,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:19,928 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 139 [2022-11-22 01:48:19,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:19,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:20,130 INFO L321 Elim1Store]: treesize reduction 216, result has 22.6 percent of original size [2022-11-22 01:48:20,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 208 treesize of output 226 [2022-11-22 01:48:20,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:20,143 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 177 [2022-11-22 01:48:20,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:20,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:20,327 INFO L321 Elim1Store]: treesize reduction 232, result has 21.4 percent of original size [2022-11-22 01:48:20,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 11 case distinctions, treesize of input 53 treesize of output 121 [2022-11-22 01:48:20,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:20,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 83 [2022-11-22 01:48:20,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:20,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:20,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:20,436 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 56 treesize of output 40 [2022-11-22 01:48:31,460 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 01:48:31,461 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 1060 treesize of output 950 [2022-11-22 01:48:31,691 INFO L321 Elim1Store]: treesize reduction 114, result has 39.7 percent of original size [2022-11-22 01:48:31,692 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 6 new quantified variables, introduced 11 case distinctions, treesize of input 918 treesize of output 981 [2022-11-22 01:48:31,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:31,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:33,621 INFO L321 Elim1Store]: treesize reduction 1202, result has 11.7 percent of original size [2022-11-22 01:48:33,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 10 select indices, 10 select index equivalence classes, 8 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 65 case distinctions, treesize of input 925 treesize of output 1177 [2022-11-22 01:48:33,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:48:34,139 INFO L321 Elim1Store]: treesize reduction 32, result has 57.3 percent of original size [2022-11-22 01:48:34,140 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 5 new quantified variables, introduced 4 case distinctions, treesize of input 841 treesize of output 881 [2022-11-22 01:48:34,615 INFO L321 Elim1Store]: treesize reduction 36, result has 40.0 percent of original size [2022-11-22 01:48:34,616 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 5 new quantified variables, introduced 4 case distinctions, treesize of input 824 treesize of output 850 [2022-11-22 01:48:35,123 INFO L321 Elim1Store]: treesize reduction 36, result has 40.0 percent of original size [2022-11-22 01:48:35,124 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 5 new quantified variables, introduced 4 case distinctions, treesize of input 813 treesize of output 839