./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/res1o.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/res1o.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI --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 64693615f2d98484fbf4ccec390e9fe8d95f9d4648b0c6cc4a2e86f0656bfacf --- 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-5e519f3 [2022-11-03 02:19:37,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:19:37,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:19:37,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:19:37,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:19:37,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:19:37,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:19:37,157 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:19:37,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:19:37,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:19:37,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:19:37,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:19:37,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:19:37,176 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:19:37,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:19:37,181 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:19:37,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:19:37,192 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:19:37,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:19:37,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:19:37,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:19:37,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:19:37,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:19:37,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:19:37,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:19:37,215 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:19:37,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:19:37,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:19:37,219 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:19:37,220 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:19:37,221 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:19:37,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:19:37,225 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:19:37,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:19:37,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:19:37,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:19:37,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:19:37,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:19:37,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:19:37,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:19:37,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:19:37,233 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:19:37,284 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:19:37,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:19:37,286 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:19:37,286 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:19:37,288 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:19:37,288 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:19:37,288 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:19:37,289 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:19:37,289 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:19:37,289 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:19:37,291 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:19:37,291 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:19:37,291 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:19:37,291 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:19:37,292 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:19:37,292 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:19:37,292 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:19:37,293 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:19:37,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:19:37,294 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:19:37,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:19:37,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:19:37,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:19:37,297 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:19:37,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:19:37,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:19:37,298 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:19:37,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:19:37,299 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:19:37,299 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:19:37,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:19:37,300 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:19:37,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:19:37,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:19:37,301 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:19:37,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:19:37,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:19:37,301 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:19:37,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:19:37,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:19:37,302 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:19:37,302 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_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64693615f2d98484fbf4ccec390e9fe8d95f9d4648b0c6cc4a2e86f0656bfacf [2022-11-03 02:19:37,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:19:37,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:19:37,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:19:37,631 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:19:37,632 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:19:37,634 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-fpi/res1o.c [2022-11-03 02:19:37,735 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/data/e86333c08/811d33e6baf34c0ab755e91a7c402f8d/FLAG14935068d [2022-11-03 02:19:38,298 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:19:38,299 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/sv-benchmarks/c/array-fpi/res1o.c [2022-11-03 02:19:38,307 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/data/e86333c08/811d33e6baf34c0ab755e91a7c402f8d/FLAG14935068d [2022-11-03 02:19:38,630 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/data/e86333c08/811d33e6baf34c0ab755e91a7c402f8d [2022-11-03 02:19:38,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:19:38,634 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:19:38,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:19:38,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:19:38,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:19:38,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:19:38" (1/1) ... [2022-11-03 02:19:38,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79df18ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:38, skipping insertion in model container [2022-11-03 02:19:38,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:19:38" (1/1) ... [2022-11-03 02:19:38,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:19:38,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:19:38,889 WARN L230 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_26176943-c542-49f0-8f5c-69f9a816202f/sv-benchmarks/c/array-fpi/res1o.c[588,601] [2022-11-03 02:19:38,912 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:19:38,922 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:19:38,935 WARN L230 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_26176943-c542-49f0-8f5c-69f9a816202f/sv-benchmarks/c/array-fpi/res1o.c[588,601] [2022-11-03 02:19:38,946 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:19:38,962 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:19:38,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:38 WrapperNode [2022-11-03 02:19:38,963 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:19:38,964 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:19:38,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:19:38,964 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:19:38,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:38" (1/1) ... [2022-11-03 02:19:39,001 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:38" (1/1) ... [2022-11-03 02:19:39,039 INFO L138 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 88 [2022-11-03 02:19:39,042 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:19:39,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:19:39,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:19:39,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:19:39,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:38" (1/1) ... [2022-11-03 02:19:39,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:38" (1/1) ... [2022-11-03 02:19:39,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:38" (1/1) ... [2022-11-03 02:19:39,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:38" (1/1) ... [2022-11-03 02:19:39,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:38" (1/1) ... [2022-11-03 02:19:39,089 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:38" (1/1) ... [2022-11-03 02:19:39,091 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:38" (1/1) ... [2022-11-03 02:19:39,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:38" (1/1) ... [2022-11-03 02:19:39,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:19:39,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:19:39,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:19:39,100 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:19:39,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:38" (1/1) ... [2022-11-03 02:19:39,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:19:39,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:39,142 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:19:39,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:19:39,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:19:39,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:19:39,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:19:39,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:19:39,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:19:39,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:19:39,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:19:39,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:19:39,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:19:39,316 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:19:39,318 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:19:39,509 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:19:39,567 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:19:39,568 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-03 02:19:39,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:19:39 BoogieIcfgContainer [2022-11-03 02:19:39,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:19:39,574 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:19:39,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:19:39,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:19:39,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:19:38" (1/3) ... [2022-11-03 02:19:39,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211af8d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:19:39, skipping insertion in model container [2022-11-03 02:19:39,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:19:38" (2/3) ... [2022-11-03 02:19:39,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211af8d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:19:39, skipping insertion in model container [2022-11-03 02:19:39,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:19:39" (3/3) ... [2022-11-03 02:19:39,593 INFO L112 eAbstractionObserver]: Analyzing ICFG res1o.c [2022-11-03 02:19:39,618 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:19:39,618 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:19:39,680 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:19:39,689 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;@646591b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:19:39,690 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:19:39,695 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:39,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 02:19:39,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:39,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:39,705 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:39,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:39,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1860276480, now seen corresponding path program 1 times [2022-11-03 02:19:39,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:39,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366775298] [2022-11-03 02:19:39,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:39,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:40,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:40,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366775298] [2022-11-03 02:19:40,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366775298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:19:40,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:19:40,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:19:40,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645483405] [2022-11-03 02:19:40,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:19:40,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:19:40,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:40,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:19:40,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:19:40,285 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:40,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:40,388 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2022-11-03 02:19:40,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:19:40,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 02:19:40,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:40,402 INFO L225 Difference]: With dead ends: 22 [2022-11-03 02:19:40,403 INFO L226 Difference]: Without dead ends: 10 [2022-11-03 02:19:40,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:19:40,410 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:40,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:19:40,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-03 02:19:40,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-11-03 02:19:40,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:40,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2022-11-03 02:19:40,448 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 8 [2022-11-03 02:19:40,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:40,449 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2022-11-03 02:19:40,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:40,449 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2022-11-03 02:19:40,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-03 02:19:40,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:40,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:40,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:19:40,451 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:40,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:40,452 INFO L85 PathProgramCache]: Analyzing trace with hash 509978442, now seen corresponding path program 1 times [2022-11-03 02:19:40,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:40,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916544075] [2022-11-03 02:19:40,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:40,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:19:40,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:40,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916544075] [2022-11-03 02:19:40,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916544075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:19:40,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:19:40,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:19:40,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294662513] [2022-11-03 02:19:40,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:19:40,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:19:40,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:40,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:19:40,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:19:40,588 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:40,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:40,631 INFO L93 Difference]: Finished difference Result 18 states and 25 transitions. [2022-11-03 02:19:40,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:19:40,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-03 02:19:40,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:40,633 INFO L225 Difference]: With dead ends: 18 [2022-11-03 02:19:40,633 INFO L226 Difference]: Without dead ends: 13 [2022-11-03 02:19:40,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:19:40,635 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:40,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 4 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:19:40,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-03 02:19:40,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-03 02:19:40,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:40,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-03 02:19:40,642 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2022-11-03 02:19:40,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:40,643 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-03 02:19:40,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:40,643 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-03 02:19:40,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 02:19:40,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:40,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:40,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:19:40,645 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:40,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:40,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1718165419, now seen corresponding path program 1 times [2022-11-03 02:19:40,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:40,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189310789] [2022-11-03 02:19:40,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:40,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:42,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:42,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189310789] [2022-11-03 02:19:42,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189310789] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:19:42,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711414738] [2022-11-03 02:19:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:42,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:42,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:42,537 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:42,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:19:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:42,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-03 02:19:42,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:42,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:19:42,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-03 02:19:42,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:42,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 02:19:43,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:43,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 39 treesize of output 26 [2022-11-03 02:19:43,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:43,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 28 [2022-11-03 02:19:43,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:43,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2022-11-03 02:19:43,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:43,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 39 treesize of output 15 [2022-11-03 02:19:43,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:43,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:19:48,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711414738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:48,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [480999955] [2022-11-03 02:19:48,579 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 02:19:48,579 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:19:48,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:19:48,591 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:19:48,592 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:19:48,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:48,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:48,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:48,877 INFO L356 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-11-03 02:19:48,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-11-03 02:19:48,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:48,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:48,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:48,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:48,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:49,163 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 02:19:49,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 02:19:49,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:49,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:19:49,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:49,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:49,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 02:19:49,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:49,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:49,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:49,536 INFO L356 Elim1Store]: treesize reduction 106, result has 20.9 percent of original size [2022-11-03 02:19:49,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 8 case distinctions, treesize of input 411 treesize of output 413 [2022-11-03 02:19:49,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:19:49,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:49,758 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 02:19:49,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:19:49,878 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:19:49,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:19:49,954 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:19:49,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:19:50,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:50,044 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 02:19:50,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:19:50,163 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:19:50,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:19:50,211 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:19:51,248 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '212#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem15#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem15#1| (* 2 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 02:19:51,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:19:51,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:19:51,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-11-03 02:19:51,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036192314] [2022-11-03 02:19:51,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:51,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:19:51,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:51,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:19:51,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=859, Unknown=1, NotChecked=0, Total=992 [2022-11-03 02:19:51,253 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:52,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:52,303 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2022-11-03 02:19:52,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:19:52,304 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-03 02:19:52,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:52,306 INFO L225 Difference]: With dead ends: 24 [2022-11-03 02:19:52,306 INFO L226 Difference]: Without dead ends: 21 [2022-11-03 02:19:52,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=236, Invalid=1323, Unknown=1, NotChecked=0, Total=1560 [2022-11-03 02:19:52,308 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:52,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 28 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 45 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-03 02:19:52,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-03 02:19:52,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-11-03 02:19:52,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:52,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2022-11-03 02:19:52,318 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 12 [2022-11-03 02:19:52,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:52,318 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2022-11-03 02:19:52,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:52,319 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2022-11-03 02:19:52,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 02:19:52,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:52,320 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:52,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:52,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:52,521 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:52,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:52,522 INFO L85 PathProgramCache]: Analyzing trace with hash -312878327, now seen corresponding path program 2 times [2022-11-03 02:19:52,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:52,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738568789] [2022-11-03 02:19:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:52,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:52,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:19:52,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:52,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738568789] [2022-11-03 02:19:52,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738568789] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:19:52,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656707886] [2022-11-03 02:19:52,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:19:52,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:52,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:52,657 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:52,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:19:52,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:19:52,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:19:52,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:19:52,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:19:52,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:52,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:19:52,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656707886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:52,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1244727193] [2022-11-03 02:19:52,877 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 02:19:52,877 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:19:52,877 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:19:52,877 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:19:52,878 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:19:52,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:52,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:52,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:52,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:52,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:53,149 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 02:19:53,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 02:19:53,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:53,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:53,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:53,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 02:19:53,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:53,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:19:53,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:53,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:53,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 02:19:53,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:53,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:53,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:53,518 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 02:19:53,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 416 treesize of output 412 [2022-11-03 02:19:53,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:19:53,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:53,741 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 02:19:53,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:19:53,853 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:19:53,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:19:53,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:19:53,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:19:54,032 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 02:19:54,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 02:19:54,138 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:19:54,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:19:54,182 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:19:54,853 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '386#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem15#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem15#1| (* 2 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 02:19:54,853 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:19:54,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:19:54,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-11-03 02:19:54,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076760914] [2022-11-03 02:19:54,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:54,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:19:54,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:54,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:19:54,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:19:54,855 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:55,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:55,021 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2022-11-03 02:19:55,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:19:55,022 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 02:19:55,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:55,023 INFO L225 Difference]: With dead ends: 41 [2022-11-03 02:19:55,023 INFO L226 Difference]: Without dead ends: 25 [2022-11-03 02:19:55,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:19:55,027 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:55,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 10 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:19:55,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-03 02:19:55,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2022-11-03 02:19:55,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:55,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2022-11-03 02:19:55,037 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 13 [2022-11-03 02:19:55,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:55,037 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2022-11-03 02:19:55,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:55,038 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2022-11-03 02:19:55,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 02:19:55,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:55,039 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:55,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:55,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:55,257 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:55,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:55,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1575206657, now seen corresponding path program 3 times [2022-11-03 02:19:55,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:55,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263016538] [2022-11-03 02:19:55,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:55,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:19:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:19:55,399 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:19:55,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263016538] [2022-11-03 02:19:55,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263016538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:19:55,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745928409] [2022-11-03 02:19:55,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:19:55,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:55,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:19:55,402 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:19:55,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:19:55,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:19:55,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:19:55,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:19:55,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:19:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:19:55,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:19:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:19:55,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745928409] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:19:55,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2126349927] [2022-11-03 02:19:55,603 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 02:19:55,603 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:19:55,603 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:19:55,603 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:19:55,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:19:55,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:55,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:55,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:55,838 INFO L356 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-11-03 02:19:55,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-11-03 02:19:55,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:55,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:55,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:55,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:55,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:56,120 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 02:19:56,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 02:19:56,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:56,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:19:56,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:56,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:56,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 43 [2022-11-03 02:19:56,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:56,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:56,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:19:56,427 INFO L356 Elim1Store]: treesize reduction 110, result has 12.0 percent of original size [2022-11-03 02:19:56,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 416 treesize of output 412 [2022-11-03 02:19:56,543 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:19:56,594 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 02:19:56,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 02:19:56,691 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:19:56,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:19:56,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:19:56,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:19:56,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:19:56,848 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 02:19:56,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:19:56,946 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:19:56,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:19:56,995 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:19:57,581 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '582#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem15#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem15#1| (* 2 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 02:19:57,581 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:19:57,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:19:57,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-03 02:19:57,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935097846] [2022-11-03 02:19:57,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:19:57,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:19:57,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:19:57,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:19:57,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:19:57,584 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:57,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:19:57,731 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-11-03 02:19:57,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:19:57,732 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-03 02:19:57,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:19:57,732 INFO L225 Difference]: With dead ends: 22 [2022-11-03 02:19:57,733 INFO L226 Difference]: Without dead ends: 17 [2022-11-03 02:19:57,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:19:57,734 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:19:57,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 10 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:19:57,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-03 02:19:57,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-03 02:19:57,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:57,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-03 02:19:57,742 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2022-11-03 02:19:57,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:19:57,742 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-03 02:19:57,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:19:57,743 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-03 02:19:57,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 02:19:57,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:19:57,744 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:19:57,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:19:57,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:19:57,948 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:19:57,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:19:57,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1925428128, now seen corresponding path program 4 times [2022-11-03 02:19:57,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:19:57,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464488806] [2022-11-03 02:19:57,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:19:57,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:19:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:00,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:20:00,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464488806] [2022-11-03 02:20:00,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464488806] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:20:00,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678723955] [2022-11-03 02:20:00,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:20:00,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:00,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:20:00,140 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:20:00,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:20:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:00,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-03 02:20:00,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:00,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-03 02:20:00,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:20:00,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:00,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:20:00,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:00,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:00,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-03 02:20:00,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:00,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:00,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2022-11-03 02:20:00,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:00,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 36 [2022-11-03 02:20:01,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:01,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 40 [2022-11-03 02:20:01,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:01,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:01,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 52 [2022-11-03 02:20:01,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:01,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:01,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 60 [2022-11-03 02:20:01,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:01,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-11-03 02:20:01,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:01,879 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2022-11-03 02:20:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:01,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:20:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:18,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678723955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:20:18,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [313082957] [2022-11-03 02:20:18,133 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 02:20:18,133 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:20:18,134 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:20:18,134 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:20:18,134 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:20:18,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:18,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:18,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:18,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:18,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:18,365 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 02:20:18,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 02:20:18,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:18,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:20:18,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:18,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:18,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:18,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 02:20:18,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:18,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:18,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 02:20:18,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:18,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:20:18,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:20:18,704 INFO L356 Elim1Store]: treesize reduction 106, result has 20.9 percent of original size [2022-11-03 02:20:18,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 8 case distinctions, treesize of input 411 treesize of output 413 [2022-11-03 02:20:18,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:20:18,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:20:19,000 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 02:20:19,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:20:19,122 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:20:19,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:20:19,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:20:19,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:20:19,266 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 02:20:19,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 02:20:19,352 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:20:19,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:20:19,393 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:20:20,956 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '788#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem15#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem15#1| (* 2 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 02:20:20,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:20:20,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:20:20,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-11-03 02:20:20,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720663737] [2022-11-03 02:20:20,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:20:20,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:20:20,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:20:20,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:20:20,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1693, Unknown=5, NotChecked=0, Total=1892 [2022-11-03 02:20:20,960 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 40 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:20:25,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:20:25,371 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2022-11-03 02:20:25,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 02:20:25,375 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 02:20:25,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:20:25,376 INFO L225 Difference]: With dead ends: 41 [2022-11-03 02:20:25,376 INFO L226 Difference]: Without dead ends: 38 [2022-11-03 02:20:25,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=328, Invalid=2746, Unknown=6, NotChecked=0, Total=3080 [2022-11-03 02:20:25,379 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:20:25,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 68 Invalid, 0 Unknown, 113 Unchecked, 0.1s Time] [2022-11-03 02:20:25,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-03 02:20:25,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2022-11-03 02:20:25,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:20:25,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-11-03 02:20:25,397 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 16 [2022-11-03 02:20:25,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:20:25,398 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-11-03 02:20:25,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:20:25,398 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-11-03 02:20:25,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 02:20:25,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:20:25,399 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:20:25,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:25,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:20:25,604 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:20:25,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:20:25,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1731759360, now seen corresponding path program 5 times [2022-11-03 02:20:25,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:20:25,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659107169] [2022-11-03 02:20:25,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:25,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:20:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:20:25,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:20:25,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659107169] [2022-11-03 02:20:25,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659107169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:20:25,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629443112] [2022-11-03 02:20:25,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:20:25,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:25,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:20:25,760 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:20:25,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:20:25,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:20:25,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:20:25,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:20:25,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:20:25,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:20:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:20:26,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629443112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:20:26,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [431192802] [2022-11-03 02:20:26,054 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 02:20:26,054 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:20:26,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:20:26,055 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:20:26,055 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:20:26,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:26,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:26,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:26,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:26,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:26,292 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 02:20:26,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 02:20:26,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:26,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:26,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:26,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 02:20:26,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:26,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:20:26,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:26,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:26,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 02:20:26,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:26,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:20:26,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:20:26,637 INFO L356 Elim1Store]: treesize reduction 106, result has 20.9 percent of original size [2022-11-03 02:20:26,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 8 case distinctions, treesize of input 411 treesize of output 413 [2022-11-03 02:20:26,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:20:26,903 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 02:20:26,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 02:20:27,001 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:20:27,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:20:27,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:20:27,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:20:27,143 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 02:20:27,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 02:20:27,240 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:20:27,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:20:27,273 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:20:27,882 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1060#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem15#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem15#1| (* 2 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 02:20:27,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:20:27,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:20:27,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-11-03 02:20:27,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338806403] [2022-11-03 02:20:27,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:20:27,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:20:27,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:20:27,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:20:27,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:20:27,884 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:20:28,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:20:28,087 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2022-11-03 02:20:28,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:20:28,088 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-03 02:20:28,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:20:28,089 INFO L225 Difference]: With dead ends: 62 [2022-11-03 02:20:28,089 INFO L226 Difference]: Without dead ends: 37 [2022-11-03 02:20:28,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 12 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:20:28,090 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:20:28,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 12 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:20:28,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-03 02:20:28,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-11-03 02:20:28,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:20:28,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-11-03 02:20:28,105 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 17 [2022-11-03 02:20:28,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:20:28,106 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-11-03 02:20:28,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:20:28,106 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-11-03 02:20:28,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:20:28,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:20:28,108 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:20:28,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:28,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:20:28,309 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:20:28,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:20:28,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1185288714, now seen corresponding path program 6 times [2022-11-03 02:20:28,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:20:28,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126681575] [2022-11-03 02:20:28,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:28,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:20:28,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:20:28,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:20:28,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126681575] [2022-11-03 02:20:28,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126681575] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:20:28,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704238172] [2022-11-03 02:20:28,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:20:28,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:28,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:20:28,471 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:20:28,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:20:28,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:20:28,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:20:28,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:20:28,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:20:28,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:20:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:20:28,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704238172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:20:28,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [365050294] [2022-11-03 02:20:28,753 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 02:20:28,753 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:20:28,754 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:20:28,754 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:20:28,754 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:20:28,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:28,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:28,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:28,977 INFO L356 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-11-03 02:20:28,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 72 [2022-11-03 02:20:28,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:28,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:29,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:29,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:29,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:29,201 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 02:20:29,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 02:20:29,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:29,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:20:29,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:29,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:29,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 02:20:29,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:29,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:20:29,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:20:29,490 INFO L356 Elim1Store]: treesize reduction 106, result has 20.9 percent of original size [2022-11-03 02:20:29,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 8 case distinctions, treesize of input 411 treesize of output 413 [2022-11-03 02:20:29,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:20:29,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:20:29,668 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 02:20:29,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:20:29,754 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:20:29,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:20:29,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:20:29,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:20:29,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:20:29,902 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 02:20:29,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:20:30,008 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:20:30,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:20:30,046 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:20:30,718 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1351#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem15#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem15#1| (* 2 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 02:20:30,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:20:30,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:20:30,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-03 02:20:30,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131687573] [2022-11-03 02:20:30,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:20:30,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:20:30,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:20:30,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:20:30,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:20:30,721 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:20:30,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:20:30,947 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-11-03 02:20:30,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:20:30,948 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-03 02:20:30,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:20:30,949 INFO L225 Difference]: With dead ends: 34 [2022-11-03 02:20:30,949 INFO L226 Difference]: Without dead ends: 25 [2022-11-03 02:20:30,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 13 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:20:30,951 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:20:30,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 12 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:20:30,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-03 02:20:30,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2022-11-03 02:20:30,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:20:30,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-03 02:20:30,962 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 18 [2022-11-03 02:20:30,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:20:30,962 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-03 02:20:30,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:20:30,963 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-03 02:20:30,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 02:20:30,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:20:30,964 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:20:31,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:20:31,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:31,179 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:20:31,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:20:31,179 INFO L85 PathProgramCache]: Analyzing trace with hash 35953013, now seen corresponding path program 7 times [2022-11-03 02:20:31,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:20:31,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826053033] [2022-11-03 02:20:31,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:20:31,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:20:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:34,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:20:34,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826053033] [2022-11-03 02:20:34,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826053033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:20:34,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177858588] [2022-11-03 02:20:34,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:20:34,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:20:34,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:20:34,300 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:20:34,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:20:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:20:34,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:20:34,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:20:34,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:20:34,472 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:20:34,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 19 [2022-11-03 02:20:34,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:20:34,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-03 02:20:34,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:34,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:34,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-03 02:20:35,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:35,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:20:35,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:35,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-03 02:20:35,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:20:35,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:35,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:35,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 58 [2022-11-03 02:20:35,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 48 [2022-11-03 02:20:35,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2022-11-03 02:20:35,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 71 [2022-11-03 02:20:35,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:35,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:35,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 75 [2022-11-03 02:20:36,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:36,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:36,252 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 83 [2022-11-03 02:20:36,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:36,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:36,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:36,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:20:36,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:20:36,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 87 [2022-11-03 02:20:36,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 81 [2022-11-03 02:20:36,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2022-11-03 02:20:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:20:36,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:21:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:21:38,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177858588] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:21:38,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1299615656] [2022-11-03 02:21:38,288 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 02:21:38,288 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:21:38,288 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:21:38,289 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:21:38,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:21:38,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:38,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:38,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:38,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:38,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:38,509 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 02:21:38,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 02:21:38,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:38,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:21:38,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:38,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:38,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:38,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 02:21:38,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:38,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:38,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 02:21:38,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:21:38,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:38,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:21:38,800 INFO L356 Elim1Store]: treesize reduction 106, result has 20.9 percent of original size [2022-11-03 02:21:38,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 8 case distinctions, treesize of input 411 treesize of output 413 [2022-11-03 02:21:38,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:21:38,966 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 02:21:38,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 02:21:39,046 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:21:39,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:21:39,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:21:39,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:21:39,189 INFO L356 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-03 02:21:39,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-03 02:21:39,294 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:21:39,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:21:39,332 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:21:42,354 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1626#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem15#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem15#1| (* 2 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 02:21:42,354 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:21:42,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:21:42,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 51 [2022-11-03 02:21:42,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789178241] [2022-11-03 02:21:42,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:21:42,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-03 02:21:42,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:21:42,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-03 02:21:42,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2717, Unknown=15, NotChecked=0, Total=2970 [2022-11-03 02:21:42,363 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:31,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:31,506 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2022-11-03 02:22:31,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-03 02:22:31,507 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-03 02:22:31,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:31,508 INFO L225 Difference]: With dead ends: 53 [2022-11-03 02:22:31,508 INFO L226 Difference]: Without dead ends: 50 [2022-11-03 02:22:31,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 14 SyntacticMatches, 10 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1611 ImplicationChecksByTransitivity, 112.3s TimeCoverageRelationStatistics Valid=412, Invalid=4528, Unknown=30, NotChecked=0, Total=4970 [2022-11-03 02:22:31,511 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:31,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 117 Invalid, 0 Unknown, 181 Unchecked, 0.2s Time] [2022-11-03 02:22:31,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-03 02:22:31,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2022-11-03 02:22:31,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 42 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:31,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2022-11-03 02:22:31,548 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 20 [2022-11-03 02:22:31,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:31,549 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2022-11-03 02:22:31,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:31,550 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2022-11-03 02:22:31,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 02:22:31,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:31,552 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:31,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:31,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:31,756 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:31,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:31,757 INFO L85 PathProgramCache]: Analyzing trace with hash -2005142871, now seen corresponding path program 8 times [2022-11-03 02:22:31,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:31,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127770259] [2022-11-03 02:22:31,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:31,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:31,945 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:22:31,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:31,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127770259] [2022-11-03 02:22:31,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127770259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:31,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760179610] [2022-11-03 02:22:31,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:22:31,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:31,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:31,952 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:31,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:22:32,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:22:32,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:22:32,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:22:32,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:22:32,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:22:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:22:32,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760179610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:22:32,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [13758434] [2022-11-03 02:22:32,545 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 02:22:32,545 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:22:32,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:22:32,546 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:22:32,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:22:32,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:32,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:32,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:32,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:32,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:32,776 INFO L356 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-03 02:22:32,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 93 [2022-11-03 02:22:32,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:32,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:32,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:32,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 48 [2022-11-03 02:22:32,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:32,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:22:32,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:32,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:32,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-11-03 02:22:32,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:32,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:22:32,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:22:33,050 INFO L356 Elim1Store]: treesize reduction 106, result has 20.9 percent of original size [2022-11-03 02:22:33,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 8 case distinctions, treesize of input 411 treesize of output 413 [2022-11-03 02:22:33,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:22:33,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:22:33,297 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 02:22:33,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:22:33,386 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:22:33,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:22:33,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:22:33,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-03 02:22:33,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:22:33,524 INFO L356 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-03 02:22:33,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-03 02:22:33,634 INFO L356 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-03 02:22:33,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-03 02:22:33,697 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:22:34,540 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1984#(and (<= 0 ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|) |ULTIMATE.start_main_#t~mem15#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (<= |ULTIMATE.start_main_#t~mem15#1| (* 2 ~N~0)) 1 0)) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-03 02:22:34,540 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:22:34,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:22:34,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 23 [2022-11-03 02:22:34,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29538146] [2022-11-03 02:22:34,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:22:34,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 02:22:34,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:22:34,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 02:22:34,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:22:34,543 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:35,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:22:35,131 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2022-11-03 02:22:35,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:22:35,132 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-03 02:22:35,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:22:35,133 INFO L225 Difference]: With dead ends: 62 [2022-11-03 02:22:35,133 INFO L226 Difference]: Without dead ends: 31 [2022-11-03 02:22:35,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 33 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:22:35,135 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 13 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:22:35,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 8 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:22:35,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-03 02:22:35,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2022-11-03 02:22:35,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:35,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-03 02:22:35,151 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21 [2022-11-03 02:22:35,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:22:35,151 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-03 02:22:35,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:22:35,152 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-03 02:22:35,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 02:22:35,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:22:35,153 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:22:35,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:22:35,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:35,361 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:22:35,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:22:35,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1623039552, now seen corresponding path program 9 times [2022-11-03 02:22:35,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:22:35,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386171903] [2022-11-03 02:22:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:22:35,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:22:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:22:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:22:39,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:22:39,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386171903] [2022-11-03 02:22:39,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386171903] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:22:39,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902842007] [2022-11-03 02:22:39,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:22:39,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:22:39,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:22:39,823 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:22:39,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:22:40,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:22:40,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:22:40,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-03 02:22:40,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:22:40,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:22:40,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:22:40,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-03 02:22:40,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2022-11-03 02:22:40,293 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:22:40,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 53 [2022-11-03 02:22:40,405 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:22:40,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 67 [2022-11-03 02:22:40,688 INFO L356 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-03 02:22:40,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 84 treesize of output 87 [2022-11-03 02:22:40,868 INFO L356 Elim1Store]: treesize reduction 108, result has 0.9 percent of original size [2022-11-03 02:22:40,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 93 treesize of output 99 [2022-11-03 02:22:41,078 INFO L356 Elim1Store]: treesize reduction 162, result has 0.6 percent of original size [2022-11-03 02:22:41,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 104 treesize of output 113 [2022-11-03 02:22:41,299 INFO L356 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-11-03 02:22:41,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 113 treesize of output 125 [2022-11-03 02:22:45,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:46,162 INFO L356 Elim1Store]: treesize reduction 515, result has 18.1 percent of original size [2022-11-03 02:22:46,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 2 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 105 treesize of output 147 [2022-11-03 02:22:47,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:47,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:47,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:47,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:47,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:47,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:47,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:48,177 INFO L356 Elim1Store]: treesize reduction 595, result has 22.8 percent of original size [2022-11-03 02:22:48,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 22 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 42 case distinctions, treesize of input 366 treesize of output 358 [2022-11-03 02:22:55,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:55,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:55,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:55,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:55,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:55,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:55,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:55,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:22:55,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:22:56,993 INFO L356 Elim1Store]: treesize reduction 1410, result has 21.9 percent of original size [2022-11-03 02:22:56,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 16 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 92 case distinctions, treesize of input 408 treesize of output 606 [2022-11-03 02:29:57,515 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-11-03 02:29:57,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2022-11-03 02:29:57,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [294560576] [2022-11-03 02:29:57,518 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 02:29:57,518 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:29:57,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:29:57,519 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:29:57,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:29:57,521 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:314) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:274) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:221) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 44 more [2022-11-03 02:29:57,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:29:57,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-11-03 02:29:57,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038833674] [2022-11-03 02:29:57,526 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 02:29:57,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-03 02:29:57,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:29:57,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-03 02:29:57,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1109, Unknown=2, NotChecked=0, Total=1260 [2022-11-03 02:29:57,527 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 23 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:29:57,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=149, Invalid=1109, Unknown=2, NotChecked=0, Total=1260 [2022-11-03 02:29:57,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2022-11-03 02:29:57,529 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:57,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:29:57,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-03 02:29:57,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 02:29:57,744 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:314) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:158) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertCodeBlock(IncrementalHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:278) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:199) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:365) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:156) ... 36 more [2022-11-03 02:29:57,747 INFO L158 Benchmark]: Toolchain (without parser) took 619111.92ms. Allocated memory was 109.1MB in the beginning and 251.7MB in the end (delta: 142.6MB). Free memory was 73.6MB in the beginning and 188.4MB in the end (delta: -114.8MB). Peak memory consumption was 28.0MB. Max. memory is 16.1GB. [2022-11-03 02:29:57,747 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 83.9MB. Free memory was 57.3MB in the beginning and 57.2MB in the end (delta: 28.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:29:57,747 INFO L158 Benchmark]: CACSL2BoogieTranslator took 326.43ms. Allocated memory is still 109.1MB. Free memory was 73.5MB in the beginning and 84.1MB in the end (delta: -10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 02:29:57,748 INFO L158 Benchmark]: Boogie Procedure Inliner took 78.88ms. Allocated memory is still 109.1MB. Free memory was 84.1MB in the beginning and 82.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:29:57,748 INFO L158 Benchmark]: Boogie Preprocessor took 55.56ms. Allocated memory is still 109.1MB. Free memory was 82.6MB in the beginning and 81.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:29:57,748 INFO L158 Benchmark]: RCFGBuilder took 471.22ms. Allocated memory is still 109.1MB. Free memory was 80.8MB in the beginning and 66.2MB in the end (delta: 14.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 02:29:57,748 INFO L158 Benchmark]: TraceAbstraction took 618172.09ms. Allocated memory was 109.1MB in the beginning and 251.7MB in the end (delta: 142.6MB). Free memory was 65.8MB in the beginning and 188.4MB in the end (delta: -122.6MB). Peak memory consumption was 22.3MB. Max. memory is 16.1GB. [2022-11-03 02:29:57,750 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 83.9MB. Free memory was 57.3MB in the beginning and 57.2MB in the end (delta: 28.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 326.43ms. Allocated memory is still 109.1MB. Free memory was 73.5MB in the beginning and 84.1MB in the end (delta: -10.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 78.88ms. Allocated memory is still 109.1MB. Free memory was 84.1MB in the beginning and 82.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 55.56ms. Allocated memory is still 109.1MB. Free memory was 82.6MB in the beginning and 81.2MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 471.22ms. Allocated memory is still 109.1MB. Free memory was 80.8MB in the beginning and 66.2MB in the end (delta: 14.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 618172.09ms. Allocated memory was 109.1MB in the beginning and 251.7MB in the end (delta: 142.6MB). Free memory was 65.8MB in the beginning and 188.4MB in the end (delta: -122.6MB). Peak memory consumption was 22.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:314) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/res1o.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI --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 64693615f2d98484fbf4ccec390e9fe8d95f9d4648b0c6cc4a2e86f0656bfacf --- 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-5e519f3 [2022-11-03 02:29:59,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:29:59,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:29:59,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:29:59,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:29:59,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:29:59,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:29:59,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:29:59,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:29:59,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:29:59,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:29:59,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:29:59,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:29:59,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:29:59,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:29:59,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:29:59,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:29:59,899 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:29:59,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:29:59,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:29:59,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:29:59,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:29:59,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:29:59,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:29:59,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:29:59,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:29:59,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:29:59,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:29:59,931 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:29:59,932 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:29:59,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:29:59,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:29:59,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:29:59,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:29:59,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:29:59,938 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:29:59,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:29:59,939 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:29:59,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:29:59,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:29:59,942 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:29:59,945 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 02:30:00,000 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:30:00,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:30:00,001 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:30:00,001 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:30:00,002 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:30:00,002 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:30:00,002 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:30:00,002 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:30:00,002 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:30:00,003 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:30:00,003 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:30:00,003 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:30:00,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:30:00,004 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:30:00,004 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:30:00,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:30:00,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:30:00,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:30:00,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:30:00,005 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:30:00,006 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:30:00,006 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:30:00,006 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:30:00,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:30:00,006 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:30:00,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:30:00,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:30:00,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:30:00,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:30:00,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:30:00,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:30:00,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:30:00,008 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:30:00,009 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:30:00,009 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:00,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:30:00,009 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:30:00,009 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:30:00,010 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64693615f2d98484fbf4ccec390e9fe8d95f9d4648b0c6cc4a2e86f0656bfacf [2022-11-03 02:30:00,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:30:00,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:30:00,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:30:00,402 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:30:00,403 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:30:00,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/array-fpi/res1o.c [2022-11-03 02:30:00,483 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/data/64b16c8dd/d53f471a2c7145eca9328ec8968bdbab/FLAG47efe29ea [2022-11-03 02:30:01,003 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:30:01,004 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/sv-benchmarks/c/array-fpi/res1o.c [2022-11-03 02:30:01,010 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/data/64b16c8dd/d53f471a2c7145eca9328ec8968bdbab/FLAG47efe29ea [2022-11-03 02:30:01,352 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/data/64b16c8dd/d53f471a2c7145eca9328ec8968bdbab [2022-11-03 02:30:01,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:30:01,359 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:30:01,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:30:01,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:30:01,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:30:01,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:30:01" (1/1) ... [2022-11-03 02:30:01,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7603116e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:01, skipping insertion in model container [2022-11-03 02:30:01,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:30:01" (1/1) ... [2022-11-03 02:30:01,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:30:01,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:30:01,571 WARN L230 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_26176943-c542-49f0-8f5c-69f9a816202f/sv-benchmarks/c/array-fpi/res1o.c[588,601] [2022-11-03 02:30:01,592 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:30:01,603 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:30:01,637 WARN L230 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_26176943-c542-49f0-8f5c-69f9a816202f/sv-benchmarks/c/array-fpi/res1o.c[588,601] [2022-11-03 02:30:01,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:30:01,696 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:30:01,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:01 WrapperNode [2022-11-03 02:30:01,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:30:01,698 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:30:01,698 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:30:01,698 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:30:01,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:01" (1/1) ... [2022-11-03 02:30:01,726 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:01" (1/1) ... [2022-11-03 02:30:01,758 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 87 [2022-11-03 02:30:01,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:30:01,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:30:01,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:30:01,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:30:01,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:01" (1/1) ... [2022-11-03 02:30:01,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:01" (1/1) ... [2022-11-03 02:30:01,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:01" (1/1) ... [2022-11-03 02:30:01,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:01" (1/1) ... [2022-11-03 02:30:01,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:01" (1/1) ... [2022-11-03 02:30:01,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:01" (1/1) ... [2022-11-03 02:30:01,814 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:01" (1/1) ... [2022-11-03 02:30:01,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:01" (1/1) ... [2022-11-03 02:30:01,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:30:01,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:30:01,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:30:01,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:30:01,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:01" (1/1) ... [2022-11-03 02:30:01,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:30:01,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:01,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:30:01,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:30:01,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:30:01,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 02:30:01,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:30:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-11-03 02:30:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:30:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-03 02:30:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:30:01,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:30:01,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-11-03 02:30:01,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:30:01,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-03 02:30:02,027 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:30:02,029 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:30:02,332 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:30:02,337 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:30:02,338 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-03 02:30:02,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:30:02 BoogieIcfgContainer [2022-11-03 02:30:02,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:30:02,343 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:30:02,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:30:02,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:30:02,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:30:01" (1/3) ... [2022-11-03 02:30:02,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af8eeaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:30:02, skipping insertion in model container [2022-11-03 02:30:02,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:30:01" (2/3) ... [2022-11-03 02:30:02,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af8eeaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:30:02, skipping insertion in model container [2022-11-03 02:30:02,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:30:02" (3/3) ... [2022-11-03 02:30:02,350 INFO L112 eAbstractionObserver]: Analyzing ICFG res1o.c [2022-11-03 02:30:02,368 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:30:02,368 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:30:02,430 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:30:02,437 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;@6eea96eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:30:02,438 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:30:02,447 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:02,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:30:02,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:02,455 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:02,456 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:02,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:02,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1202110748, now seen corresponding path program 1 times [2022-11-03 02:30:02,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:02,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260445814] [2022-11-03 02:30:02,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:02,490 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:02,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:02,496 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:02,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:30:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:02,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 02:30:02,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:02,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:02,684 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:02,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [260445814] [2022-11-03 02:30:02,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [260445814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:02,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:02,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:30:02,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208904789] [2022-11-03 02:30:02,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:02,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:30:02,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:02,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:30:02,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:30:02,732 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:02,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:02,754 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2022-11-03 02:30:02,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:30:02,759 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 02:30:02,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:02,767 INFO L225 Difference]: With dead ends: 44 [2022-11-03 02:30:02,768 INFO L226 Difference]: Without dead ends: 20 [2022-11-03 02:30:02,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:30:02,776 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:02,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:30:02,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-03 02:30:02,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-03 02:30:02,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-03 02:30:02,823 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2022-11-03 02:30:02,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:02,824 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-03 02:30:02,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:02,825 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-03 02:30:02,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:30:02,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:02,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:02,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:03,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:03,038 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:03,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:03,039 INFO L85 PathProgramCache]: Analyzing trace with hash -944124056, now seen corresponding path program 1 times [2022-11-03 02:30:03,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:03,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507629457] [2022-11-03 02:30:03,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:03,040 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:03,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:03,042 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:03,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:30:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:03,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:30:03,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:03,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:30:03,367 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:03,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507629457] [2022-11-03 02:30:03,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507629457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:30:03,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:30:03,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:30:03,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915766443] [2022-11-03 02:30:03,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:30:03,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:30:03,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:03,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:30:03,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:30:03,372 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:03,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:03,551 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-11-03 02:30:03,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:30:03,552 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-03 02:30:03,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:03,553 INFO L225 Difference]: With dead ends: 41 [2022-11-03 02:30:03,553 INFO L226 Difference]: Without dead ends: 28 [2022-11-03 02:30:03,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:30:03,555 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 51 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:03,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 10 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:30:03,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-03 02:30:03,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-11-03 02:30:03,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:03,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-11-03 02:30:03,564 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2022-11-03 02:30:03,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:03,565 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-11-03 02:30:03,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:03,565 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-11-03 02:30:03,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 02:30:03,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:03,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:03,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:03,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:03,779 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:03,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:03,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1401448688, now seen corresponding path program 1 times [2022-11-03 02:30:03,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:03,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285141191] [2022-11-03 02:30:03,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:03,781 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:03,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:03,784 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:03,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:30:03,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:03,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-03 02:30:03,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:04,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:30:04,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:04,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 19 [2022-11-03 02:30:04,315 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:04,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-03 02:30:04,757 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:04,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 47 [2022-11-03 02:30:05,244 INFO L356 Elim1Store]: treesize reduction 60, result has 36.2 percent of original size [2022-11-03 02:30:05,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 66 [2022-11-03 02:30:05,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:05,752 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:05,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 57 [2022-11-03 02:30:06,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:06,013 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:06,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 72 [2022-11-03 02:30:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:06,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:09,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:09,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:09,702 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:09,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285141191] [2022-11-03 02:30:09,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285141191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:09,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [529150874] [2022-11-03 02:30:09,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:09,703 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:09,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:30:09,710 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:30:09,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-03 02:30:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:09,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-03 02:30:09,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:10,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:10,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:10,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 19 [2022-11-03 02:30:10,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:10,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:10,422 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:30:10,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 34 treesize of output 40 [2022-11-03 02:30:11,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:11,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:11,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 45 [2022-11-03 02:30:12,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:12,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:12,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:12,428 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:30:12,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 52 [2022-11-03 02:30:13,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:13,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:13,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:13,316 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:30:13,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 67 [2022-11-03 02:30:13,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:13,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:13,773 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:30:13,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 75 [2022-11-03 02:30:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:13,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:17,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:17,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:17,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [529150874] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:17,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199697059] [2022-11-03 02:30:17,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:17,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:17,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:17,566 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:17,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:30:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:17,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-03 02:30:17,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:17,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:17,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 02:30:17,771 INFO L356 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-03 02:30:17,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 19 [2022-11-03 02:30:18,022 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:18,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 34 treesize of output 36 [2022-11-03 02:30:19,059 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:19,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 47 [2022-11-03 02:30:19,863 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:19,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 56 [2022-11-03 02:30:20,658 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:20,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 71 [2022-11-03 02:30:21,157 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:21,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 83 [2022-11-03 02:30:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:21,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:21,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:21,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:21,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199697059] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:21,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:30:21,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14, 14, 15, 15] total 50 [2022-11-03 02:30:21,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256641493] [2022-11-03 02:30:21,867 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:30:21,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-03 02:30:21,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:21,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-03 02:30:21,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=2000, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 02:30:21,880 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 50 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:28,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:28,640 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-11-03 02:30:28,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 02:30:28,641 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-03 02:30:28,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:28,643 INFO L225 Difference]: With dead ends: 58 [2022-11-03 02:30:28,643 INFO L226 Difference]: Without dead ends: 52 [2022-11-03 02:30:28,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=705, Invalid=3327, Unknown=0, NotChecked=0, Total=4032 [2022-11-03 02:30:28,646 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:28,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 112 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 100 Unchecked, 1.7s Time] [2022-11-03 02:30:28,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-03 02:30:28,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2022-11-03 02:30:28,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:28,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2022-11-03 02:30:28,661 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 23 [2022-11-03 02:30:28,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:28,662 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2022-11-03 02:30:28,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:28,663 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2022-11-03 02:30:28,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 02:30:28,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:28,664 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:28,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:28,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:29,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:29,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:30:29,288 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:29,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:29,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1774307726, now seen corresponding path program 2 times [2022-11-03 02:30:29,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:29,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348850921] [2022-11-03 02:30:29,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:30:29,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:29,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:29,291 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:29,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:30:29,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:30:29,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:30:29,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 02:30:29,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:30:29,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:30:29,822 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:29,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348850921] [2022-11-03 02:30:29,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348850921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:29,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1612618381] [2022-11-03 02:30:29,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:30:29,823 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:29,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:30:29,828 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:30:29,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-03 02:30:30,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:30:30,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:30:30,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:30:30,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:30:30,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:30:30,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1612618381] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:30,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614709333] [2022-11-03 02:30:30,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 02:30:30,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:30,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:30,604 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:30,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:30:30,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 02:30:30,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:30:30,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:30:30,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:30:30,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:30:30,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614709333] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:30,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:30:30,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9, 9, 8, 7] total 24 [2022-11-03 02:30:30,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522580466] [2022-11-03 02:30:30,908 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:30:30,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 02:30:30,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:30,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 02:30:30,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:30:30,909 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:31,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:31,950 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2022-11-03 02:30:31,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:30:31,952 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-03 02:30:31,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:31,953 INFO L225 Difference]: With dead ends: 88 [2022-11-03 02:30:31,953 INFO L226 Difference]: Without dead ends: 53 [2022-11-03 02:30:31,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:30:31,954 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 130 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:31,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 31 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:30:31,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-03 02:30:31,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2022-11-03 02:30:31,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:31,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-11-03 02:30:31,967 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 25 [2022-11-03 02:30:31,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:31,967 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-11-03 02:30:31,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 24 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:31,967 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-11-03 02:30:31,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 02:30:31,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:31,969 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:31,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:32,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:32,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:32,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:32,579 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:32,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:32,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1964080588, now seen corresponding path program 3 times [2022-11-03 02:30:32,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:32,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804275498] [2022-11-03 02:30:32,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:30:32,580 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:32,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:32,581 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:32,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:30:32,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:30:32,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:30:32,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:30:32,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:30:32,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:30:33,279 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:30:33,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804275498] [2022-11-03 02:30:33,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804275498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:33,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [244997310] [2022-11-03 02:30:33,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:30:33,280 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:33,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:30:33,281 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:30:33,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-03 02:30:33,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:30:33,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:30:33,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:30:33,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:30:33,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:30:33,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [244997310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:33,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780957725] [2022-11-03 02:30:33,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:30:33,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:33,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:33,793 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:33,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:30:33,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:30:33,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:30:33,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:30:33,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:30:34,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:30:34,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780957725] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:34,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:30:34,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9, 7, 8, 7] total 27 [2022-11-03 02:30:34,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551868948] [2022-11-03 02:30:34,158 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:30:34,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 02:30:34,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:30:34,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 02:30:34,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2022-11-03 02:30:34,160 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:35,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:35,197 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2022-11-03 02:30:35,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 02:30:35,199 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-03 02:30:35,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:35,199 INFO L225 Difference]: With dead ends: 90 [2022-11-03 02:30:35,199 INFO L226 Difference]: Without dead ends: 66 [2022-11-03 02:30:35,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=410, Invalid=1072, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:30:35,201 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 279 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:35,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 25 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:30:35,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-03 02:30:35,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2022-11-03 02:30:35,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 55 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:35,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2022-11-03 02:30:35,214 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 27 [2022-11-03 02:30:35,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:35,214 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2022-11-03 02:30:35,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:30:35,214 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2022-11-03 02:30:35,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:30:35,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:35,216 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:35,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:35,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:35,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:35,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:30:35,832 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:35,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:35,833 INFO L85 PathProgramCache]: Analyzing trace with hash 666081912, now seen corresponding path program 4 times [2022-11-03 02:30:35,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:30:35,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317670568] [2022-11-03 02:30:35,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:30:35,834 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:30:35,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:30:35,835 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:30:35,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:30:36,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:30:36,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:30:36,036 WARN L261 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 02:30:36,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:36,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:36,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2022-11-03 02:30:36,137 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 02:30:36,240 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:36,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-11-03 02:30:36,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:36,550 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:36,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 44 [2022-11-03 02:30:36,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:36,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:36,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:36,987 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:36,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 63 [2022-11-03 02:30:37,353 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:37,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 111 treesize of output 71 [2022-11-03 02:30:37,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:37,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:37,897 INFO L356 Elim1Store]: treesize reduction 60, result has 45.5 percent of original size [2022-11-03 02:30:37,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 4 case distinctions, treesize of input 106 treesize of output 124 [2022-11-03 02:30:38,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:38,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:38,601 INFO L356 Elim1Store]: treesize reduction 108, result has 25.0 percent of original size [2022-11-03 02:30:38,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 105 treesize of output 112 [2022-11-03 02:30:39,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:39,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:39,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:30:39,780 INFO L356 Elim1Store]: treesize reduction 363, result has 6.2 percent of original size [2022-11-03 02:30:39,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 163 treesize of output 120 [2022-11-03 02:30:40,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:40,323 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 02:30:40,323 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 225 treesize of output 159 [2022-11-03 02:30:40,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:30:40,742 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:30:40,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 281 treesize of output 219 [2022-11-03 02:30:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:30:40,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:32:24,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:24,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:32:24,253 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:32:24,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317670568] [2022-11-03 02:32:24,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317670568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:32:24,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [276729458] [2022-11-03 02:32:24,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:32:24,253 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:32:24,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:32:24,260 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:32:24,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26176943-c542-49f0-8f5c-69f9a816202f/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-03 02:32:24,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:32:24,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:32:24,496 WARN L261 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:32:24,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:32:27,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:27,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:27,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 19 [2022-11-03 02:32:27,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:27,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:27,993 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:32:27,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 34 treesize of output 40 [2022-11-03 02:32:29,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:29,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:29,427 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 02:32:29,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2022-11-03 02:32:31,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:31,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:31,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:31,727 INFO L356 Elim1Store]: treesize reduction 99, result has 22.0 percent of original size [2022-11-03 02:32:31,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 97 treesize of output 68 [2022-11-03 02:32:32,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:32,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:32,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 67 [2022-11-03 02:32:35,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:35,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:35,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:35,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:35,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:35,331 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:32:35,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 106 treesize of output 90 [2022-11-03 02:32:38,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:38,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:38,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:38,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:38,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:38,075 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-03 02:32:38,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 98 [2022-11-03 02:32:40,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:40,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:40,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:40,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:40,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:40,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:32:40,596 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 02:32:40,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 5 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 147 treesize of output 117 [2022-11-03 02:32:42,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:42,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:42,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:42,435 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 02:32:42,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 185 treesize of output 159 [2022-11-03 02:32:43,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:43,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:32:43,788 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-03 02:32:43,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 265 treesize of output 225 [2022-11-03 02:32:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:32:43,808 INFO L328 TraceCheckSpWp]: Computing backward predicates...