./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/sina4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/sina4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 933eff495d93b07d12af9180ab5b75cc35fb173187f8af9883307194e1e7fea3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 15:52:38,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 15:52:38,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 15:52:38,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 15:52:38,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 15:52:38,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 15:52:38,196 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 15:52:38,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 15:52:38,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 15:52:38,200 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 15:52:38,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 15:52:38,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 15:52:38,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 15:52:38,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 15:52:38,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 15:52:38,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 15:52:38,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 15:52:38,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 15:52:38,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 15:52:38,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 15:52:38,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 15:52:38,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 15:52:38,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 15:52:38,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 15:52:38,245 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 15:52:38,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 15:52:38,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 15:52:38,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 15:52:38,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 15:52:38,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 15:52:38,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 15:52:38,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 15:52:38,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 15:52:38,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 15:52:38,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 15:52:38,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 15:52:38,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 15:52:38,262 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 15:52:38,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 15:52:38,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 15:52:38,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 15:52:38,264 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 15:52:38,286 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 15:52:38,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 15:52:38,286 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 15:52:38,286 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 15:52:38,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 15:52:38,287 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 15:52:38,287 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 15:52:38,288 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 15:52:38,288 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 15:52:38,288 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 15:52:38,288 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 15:52:38,288 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 15:52:38,289 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 15:52:38,289 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 15:52:38,289 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 15:52:38,289 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 15:52:38,289 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 15:52:38,290 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 15:52:38,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 15:52:38,290 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 15:52:38,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 15:52:38,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 15:52:38,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 15:52:38,291 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 15:52:38,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 15:52:38,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 15:52:38,292 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 15:52:38,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 15:52:38,292 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 15:52:38,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 15:52:38,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 15:52:38,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 15:52:38,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 15:52:38,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 15:52:38,294 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 15:52:38,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 15:52:38,296 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 15:52:38,296 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 15:52:38,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 15:52:38,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 15:52:38,296 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 15:52:38,297 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_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 933eff495d93b07d12af9180ab5b75cc35fb173187f8af9883307194e1e7fea3 [2022-11-16 15:52:38,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 15:52:38,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 15:52:38,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 15:52:38,629 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 15:52:38,630 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 15:52:38,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/array-fpi/sina4.c [2022-11-16 15:52:38,707 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/data/b1acea4cd/2ce4f92708804d688b75b29196c1d274/FLAG6cdb89084 [2022-11-16 15:52:39,277 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 15:52:39,279 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/sv-benchmarks/c/array-fpi/sina4.c [2022-11-16 15:52:39,296 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/data/b1acea4cd/2ce4f92708804d688b75b29196c1d274/FLAG6cdb89084 [2022-11-16 15:52:39,610 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/data/b1acea4cd/2ce4f92708804d688b75b29196c1d274 [2022-11-16 15:52:39,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 15:52:39,614 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 15:52:39,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 15:52:39,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 15:52:39,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 15:52:39,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 03:52:39" (1/1) ... [2022-11-16 15:52:39,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56d605d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:39, skipping insertion in model container [2022-11-16 15:52:39,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 03:52:39" (1/1) ... [2022-11-16 15:52:39,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 15:52:39,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 15:52:39,882 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/sv-benchmarks/c/array-fpi/sina4.c[588,601] [2022-11-16 15:52:39,902 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 15:52:39,910 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 15:52:39,923 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/sv-benchmarks/c/array-fpi/sina4.c[588,601] [2022-11-16 15:52:39,933 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 15:52:39,945 INFO L208 MainTranslator]: Completed translation [2022-11-16 15:52:39,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:39 WrapperNode [2022-11-16 15:52:39,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 15:52:39,947 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 15:52:39,947 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 15:52:39,947 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 15:52:39,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:39" (1/1) ... [2022-11-16 15:52:39,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:39" (1/1) ... [2022-11-16 15:52:39,984 INFO L138 Inliner]: procedures = 17, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 106 [2022-11-16 15:52:39,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 15:52:39,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 15:52:39,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 15:52:39,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 15:52:39,994 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:39" (1/1) ... [2022-11-16 15:52:39,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:39" (1/1) ... [2022-11-16 15:52:39,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:39" (1/1) ... [2022-11-16 15:52:39,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:39" (1/1) ... [2022-11-16 15:52:40,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:39" (1/1) ... [2022-11-16 15:52:40,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:39" (1/1) ... [2022-11-16 15:52:40,009 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:39" (1/1) ... [2022-11-16 15:52:40,010 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:39" (1/1) ... [2022-11-16 15:52:40,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 15:52:40,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 15:52:40,013 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 15:52:40,014 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 15:52:40,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:39" (1/1) ... [2022-11-16 15:52:40,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 15:52:40,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:52:40,054 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 15:52:40,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 15:52:40,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 15:52:40,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 15:52:40,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 15:52:40,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 15:52:40,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 15:52:40,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 15:52:40,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 15:52:40,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 15:52:40,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 15:52:40,176 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 15:52:40,178 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 15:52:40,359 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 15:52:40,442 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 15:52:40,442 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-16 15:52:40,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 03:52:40 BoogieIcfgContainer [2022-11-16 15:52:40,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 15:52:40,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 15:52:40,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 15:52:40,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 15:52:40,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 03:52:39" (1/3) ... [2022-11-16 15:52:40,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c324a7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 03:52:40, skipping insertion in model container [2022-11-16 15:52:40,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 03:52:39" (2/3) ... [2022-11-16 15:52:40,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c324a7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 03:52:40, skipping insertion in model container [2022-11-16 15:52:40,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 03:52:40" (3/3) ... [2022-11-16 15:52:40,471 INFO L112 eAbstractionObserver]: Analyzing ICFG sina4.c [2022-11-16 15:52:40,501 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 15:52:40,502 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 15:52:40,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 15:52:40,589 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;@25cd9a13, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 15:52:40,590 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 15:52:40,594 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:40,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 15:52:40,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:52:40,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:52:40,607 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:52:40,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:52:40,616 INFO L85 PathProgramCache]: Analyzing trace with hash -155408202, now seen corresponding path program 1 times [2022-11-16 15:52:40,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:52:40,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669425132] [2022-11-16 15:52:40,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:40,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:52:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:52:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:40,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:52:40,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669425132] [2022-11-16 15:52:40,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669425132] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:52:40,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:52:40,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 15:52:40,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451213776] [2022-11-16 15:52:40,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:52:40,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 15:52:40,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:52:41,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 15:52:41,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 15:52:41,010 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-11-16 15:52:41,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:52:41,116 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2022-11-16 15:52:41,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 15:52:41,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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 [2022-11-16 15:52:41,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:52:41,139 INFO L225 Difference]: With dead ends: 24 [2022-11-16 15:52:41,139 INFO L226 Difference]: Without dead ends: 12 [2022-11-16 15:52:41,142 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 [2022-11-16 15:52:41,153 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:52:41,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:52:41,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-16 15:52:41,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-16 15:52:41,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:41,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2022-11-16 15:52:41,195 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2022-11-16 15:52:41,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:52:41,195 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2022-11-16 15:52:41,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-11-16 15:52:41,197 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2022-11-16 15:52:41,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 15:52:41,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:52:41,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:52:41,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 15:52:41,199 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:52:41,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:52:41,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1655315069, now seen corresponding path program 1 times [2022-11-16 15:52:41,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:52:41,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328106384] [2022-11-16 15:52:41,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:41,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:52:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:52:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 15:52:41,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:52:41,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328106384] [2022-11-16 15:52:41,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328106384] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 15:52:41,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 15:52:41,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 15:52:41,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437852798] [2022-11-16 15:52:41,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 15:52:41,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 15:52:41,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:52:41,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 15:52:41,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 15:52:41,408 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:41,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:52:41,453 INFO L93 Difference]: Finished difference Result 27 states and 36 transitions. [2022-11-16 15:52:41,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 15:52:41,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 15:52:41,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:52:41,455 INFO L225 Difference]: With dead ends: 27 [2022-11-16 15:52:41,455 INFO L226 Difference]: Without dead ends: 20 [2022-11-16 15:52:41,455 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 [2022-11-16 15:52:41,457 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 15:52:41,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 6 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 15:52:41,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-16 15:52:41,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2022-11-16 15:52:41,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:41,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-11-16 15:52:41,463 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 10 [2022-11-16 15:52:41,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:52:41,464 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-11-16 15:52:41,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:41,464 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-11-16 15:52:41,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 15:52:41,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:52:41,465 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:52:41,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 15:52:41,466 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:52:41,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:52:41,467 INFO L85 PathProgramCache]: Analyzing trace with hash -165518152, now seen corresponding path program 1 times [2022-11-16 15:52:41,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:52:41,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040649971] [2022-11-16 15:52:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:41,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:52:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:52:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:43,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:52:43,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040649971] [2022-11-16 15:52:43,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040649971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:52:43,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980550637] [2022-11-16 15:52:43,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:43,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:52:43,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:52:43,302 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:52:43,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 15:52:43,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:52:43,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 15:52:43,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:52:43,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 15:52:43,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 15:52:43,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 15:52:43,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-16 15:52:43,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2022-11-16 15:52:44,010 INFO L321 Elim1Store]: treesize reduction 32, result has 45.8 percent of original size [2022-11-16 15:52:44,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 44 [2022-11-16 15:52:44,404 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 15:52:44,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 72 [2022-11-16 15:52:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:44,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:52:46,528 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~b~0#1.base| Int)) (= (select (let ((.cse0 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (select |c_#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)) 1))) |c_ULTIMATE.start_main_~b~0#1.offset|) (+ c_~N~0 2))) is different from false [2022-11-16 15:52:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-16 15:52:46,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980550637] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:52:46,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1836812320] [2022-11-16 15:52:46,854 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 15:52:46,854 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:52:46,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:52:46,863 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:52:46,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:52:46,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:46,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:46,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,075 INFO L321 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-11-16 15:52:47,076 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 15:52:47,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,130 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 15:52:47,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-11-16 15:52:47,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,335 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-16 15:52:47,335 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 15:52:47,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-11-16 15:52:47,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:52:47,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:47,846 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-16 15:52:47,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 528 treesize of output 516 [2022-11-16 15:52:48,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 15:52:48,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:52:48,137 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 15:52:48,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 15:52:48,222 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 15:52:48,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 15:52:48,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:52:48,274 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 15:52:48,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-16 15:52:48,354 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 15:52:48,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 15:52:48,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:52:48,426 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-16 15:52:48,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-16 15:52:48,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:52:48,485 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-16 15:52:48,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-16 15:52:48,507 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:52:49,089 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '241#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 15:52:49,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:52:49,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 15:52:49,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-11-16 15:52:49,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471058660] [2022-11-16 15:52:49,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 15:52:49,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 15:52:49,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:52:49,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 15:52:49,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=881, Unknown=1, NotChecked=60, Total=1056 [2022-11-16 15:52:49,093 INFO L87 Difference]: Start difference. First operand 15 states and 19 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) [2022-11-16 15:52:49,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:52:49,381 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-11-16 15:52:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 15:52:49,382 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 13 [2022-11-16 15:52:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:52:49,384 INFO L225 Difference]: With dead ends: 34 [2022-11-16 15:52:49,384 INFO L226 Difference]: Without dead ends: 32 [2022-11-16 15:52:49,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=120, Invalid=939, Unknown=1, NotChecked=62, Total=1122 [2022-11-16 15:52:49,386 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 15:52:49,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 26 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 144 Invalid, 0 Unknown, 23 Unchecked, 0.2s Time] [2022-11-16 15:52:49,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-16 15:52:49,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2022-11-16 15:52:49,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 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) [2022-11-16 15:52:49,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2022-11-16 15:52:49,396 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 13 [2022-11-16 15:52:49,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:52:49,396 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-11-16 15:52:49,397 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) [2022-11-16 15:52:49,397 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2022-11-16 15:52:49,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 15:52:49,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:52:49,398 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:52:49,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 15:52:49,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:52:49,604 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:52:49,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:52:49,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1745611751, now seen corresponding path program 2 times [2022-11-16 15:52:49,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:52:49,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334595174] [2022-11-16 15:52:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:49,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:52:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:52:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 15:52:49,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:52:49,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334595174] [2022-11-16 15:52:49,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334595174] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:52:49,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132245772] [2022-11-16 15:52:49,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 15:52:49,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:52:49,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:52:49,755 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:52:49,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 15:52:49,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 15:52:49,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 15:52:49,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 15:52:49,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:52:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 15:52:49,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:52:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 15:52:49,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132245772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:52:49,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1679328757] [2022-11-16 15:52:49,964 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 15:52:49,965 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:52:49,965 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:52:49,965 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:52:49,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:52:50,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,170 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-16 15:52:50,170 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 15:52:50,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-16 15:52:50,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,242 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 15:52:50,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-11-16 15:52:50,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:52:50,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:50,613 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-16 15:52:50,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 528 treesize of output 516 [2022-11-16 15:52:50,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 15:52:50,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:52:50,860 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 15:52:50,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 15:52:50,939 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 15:52:50,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 15:52:50,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:52:51,004 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 15:52:51,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 15:52:51,073 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 15:52:51,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 15:52:51,106 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-16 15:52:51,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 15:52:51,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:52:51,162 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-16 15:52:51,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-16 15:52:51,213 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:52:51,830 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '437#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 15:52:51,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:52:51,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 15:52:51,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-11-16 15:52:51,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702154458] [2022-11-16 15:52:51,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 15:52:51,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 15:52:51,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:52:51,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 15:52:51,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-16 15:52:51,832 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:51,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:52:51,977 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2022-11-16 15:52:51,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 15:52:51,977 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 15:52:51,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:52:51,978 INFO L225 Difference]: With dead ends: 62 [2022-11-16 15:52:51,978 INFO L226 Difference]: Without dead ends: 37 [2022-11-16 15:52:51,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-11-16 15:52:51,979 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:52:51,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 24 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:52:51,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-16 15:52:51,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2022-11-16 15:52:51,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:51,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-11-16 15:52:51,985 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 14 [2022-11-16 15:52:51,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:52:51,986 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-11-16 15:52:51,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:51,986 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-11-16 15:52:51,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 15:52:51,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:52:51,987 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:52:51,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 15:52:52,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:52:52,191 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:52:52,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:52:52,192 INFO L85 PathProgramCache]: Analyzing trace with hash -421291265, now seen corresponding path program 3 times [2022-11-16 15:52:52,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:52:52,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952583259] [2022-11-16 15:52:52,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:52,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:52:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:52:52,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 15:52:52,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:52:52,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952583259] [2022-11-16 15:52:52,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952583259] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:52:52,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485204372] [2022-11-16 15:52:52,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 15:52:52,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:52:52,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:52:52,285 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:52:52,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 15:52:52,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 15:52:52,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 15:52:52,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 15:52:52,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:52:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 15:52:52,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:52:52,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 15:52:52,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485204372] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:52:52,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [599889136] [2022-11-16 15:52:52,466 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 15:52:52,466 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:52:52,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:52:52,467 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:52:52,467 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:52:52,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,662 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-16 15:52:52,662 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 15:52:52,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-16 15:52:52,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,723 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 15:52:52,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-11-16 15:52:52,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:52:52,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:52,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:53,045 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-16 15:52:53,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 528 treesize of output 516 [2022-11-16 15:52:53,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 15:52:53,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:52:53,295 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 15:52:53,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 15:52:53,367 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 15:52:53,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 15:52:53,410 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 15:52:53,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 15:52:53,483 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 15:52:53,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 15:52:53,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:52:53,549 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-16 15:52:53,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-16 15:52:53,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:52:53,592 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-16 15:52:53,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-16 15:52:53,610 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:52:54,037 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '676#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 15:52:54,037 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:52:54,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 15:52:54,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-16 15:52:54,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544603910] [2022-11-16 15:52:54,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 15:52:54,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 15:52:54,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:52:54,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 15:52:54,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-16 15:52:54,039 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:54,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:52:54,202 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-11-16 15:52:54,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 15:52:54,203 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 15:52:54,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:52:54,203 INFO L225 Difference]: With dead ends: 37 [2022-11-16 15:52:54,203 INFO L226 Difference]: Without dead ends: 29 [2022-11-16 15:52:54,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-11-16 15:52:54,205 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:52:54,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 21 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:52:54,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-16 15:52:54,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2022-11-16 15:52:54,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2022-11-16 15:52:54,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-16 15:52:54,210 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 14 [2022-11-16 15:52:54,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:52:54,210 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-16 15:52:54,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:52:54,211 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-16 15:52:54,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 15:52:54,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:52:54,211 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:52:54,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 15:52:54,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:52:54,415 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:52:54,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:52:54,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1101372854, now seen corresponding path program 4 times [2022-11-16 15:52:54,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:52:54,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583905973] [2022-11-16 15:52:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:52:54,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:52:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:52:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:56,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:52:56,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583905973] [2022-11-16 15:52:56,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583905973] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:52:56,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632031406] [2022-11-16 15:52:56,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 15:52:56,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:52:56,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:52:56,295 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:52:56,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 15:52:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:52:56,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-16 15:52:56,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:52:56,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 15:52:56,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 15:52:56,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 15:52:56,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:56,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-16 15:52:56,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:56,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2022-11-16 15:52:56,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:56,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:56,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:52:56,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2022-11-16 15:52:56,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:56,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 40 [2022-11-16 15:52:57,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:57,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:57,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:52:57,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-11-16 15:52:57,268 INFO L321 Elim1Store]: treesize reduction 32, result has 45.8 percent of original size [2022-11-16 15:52:57,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 42 [2022-11-16 15:52:57,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:52:57,478 INFO L321 Elim1Store]: treesize reduction 53, result has 26.4 percent of original size [2022-11-16 15:52:57,478 INFO L350 Elim1Store]: Elim1 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 49 treesize of output 62 [2022-11-16 15:52:57,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 15:52:57,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 70 [2022-11-16 15:52:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:52:57,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:52:59,942 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_231 Int) (|ULTIMATE.start_main_~b~0#1.base| Int) (|v_ULTIMATE.start_main_~i~0#1_155| Int)) (or (= (select (store (let ((.cse0 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (select |c_#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) (+ (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)) 1))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_155|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_231) |c_ULTIMATE.start_main_~b~0#1.offset|) (+ c_~N~0 2)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_155|)))) is different from false [2022-11-16 15:53:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-16 15:53:01,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632031406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:53:01,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [561612004] [2022-11-16 15:53:01,115 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 15:53:01,115 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:53:01,115 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:53:01,115 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:53:01,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:53:01,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,278 INFO L321 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-11-16 15:53:01,278 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 15:53:01,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,326 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 15:53:01,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-11-16 15:53:01,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,525 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-16 15:53:01,526 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 15:53:01,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-11-16 15:53:01,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:01,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:01,868 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-16 15:53:01,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 528 treesize of output 516 [2022-11-16 15:53:02,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 15:53:02,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:02,071 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 15:53:02,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 15:53:02,153 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 15:53:02,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 15:53:02,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:02,236 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 15:53:02,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 15:53:02,305 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 15:53:02,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 15:53:02,342 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-16 15:53:02,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 15:53:02,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:02,389 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-16 15:53:02,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-16 15:53:02,437 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:53:03,256 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '916#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 15:53:03,256 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:53:03,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 15:53:03,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 42 [2022-11-16 15:53:03,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458905029] [2022-11-16 15:53:03,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 15:53:03,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-16 15:53:03,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:53:03,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-16 15:53:03,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1894, Unknown=1, NotChecked=88, Total=2162 [2022-11-16 15:53:03,259 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:07,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:53:07,957 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2022-11-16 15:53:07,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 15:53:07,957 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 15:53:07,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:53:07,958 INFO L225 Difference]: With dead ends: 42 [2022-11-16 15:53:07,958 INFO L226 Difference]: Without dead ends: 40 [2022-11-16 15:53:07,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=225, Invalid=2328, Unknown=1, NotChecked=98, Total=2652 [2022-11-16 15:53:07,960 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 15:53:07,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 54 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 216 Invalid, 0 Unknown, 170 Unchecked, 0.2s Time] [2022-11-16 15:53:07,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-16 15:53:07,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-11-16 15:53:07,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 31 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:07,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-11-16 15:53:07,970 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2022-11-16 15:53:07,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:53:07,971 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-11-16 15:53:07,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:07,971 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-11-16 15:53:07,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 15:53:07,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:53:07,972 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:53:07,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 15:53:08,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:08,184 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:53:08,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:53:08,184 INFO L85 PathProgramCache]: Analyzing trace with hash 314642723, now seen corresponding path program 5 times [2022-11-16 15:53:08,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:53:08,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363881638] [2022-11-16 15:53:08,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:08,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:53:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:08,307 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 15:53:08,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:53:08,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363881638] [2022-11-16 15:53:08,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363881638] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:53:08,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030293488] [2022-11-16 15:53:08,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 15:53:08,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:08,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:53:08,309 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:53:08,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 15:53:08,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 15:53:08,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 15:53:08,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 15:53:08,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:53:08,525 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 15:53:08,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:53:08,571 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 15:53:08,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030293488] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:53:08,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1243219182] [2022-11-16 15:53:08,573 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 15:53:08,573 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:53:08,574 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:53:08,574 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:53:08,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:53:08,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,741 INFO L321 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-11-16 15:53:08,742 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 15:53:08,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,915 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-16 15:53:08,916 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 15:53:08,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-16 15:53:08,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:08,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-11-16 15:53:09,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:09,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:09,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:09,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:09,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:09,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:09,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:09,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:09,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:09,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:09,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:09,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:09,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:09,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:09,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:09,214 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-16 15:53:09,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 528 treesize of output 516 [2022-11-16 15:53:09,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 15:53:09,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:09,406 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 15:53:09,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 15:53:09,473 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 15:53:09,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 15:53:09,516 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 15:53:09,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 15:53:09,584 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 15:53:09,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 15:53:09,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:09,641 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-16 15:53:09,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-16 15:53:09,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:09,680 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-16 15:53:09,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-16 15:53:09,698 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:53:10,088 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1176#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 15:53:10,088 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:53:10,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 15:53:10,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-11-16 15:53:10,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951605443] [2022-11-16 15:53:10,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 15:53:10,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 15:53:10,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:53:10,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 15:53:10,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-11-16 15:53:10,090 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:10,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:53:10,244 INFO L93 Difference]: Finished difference Result 84 states and 102 transitions. [2022-11-16 15:53:10,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 15:53:10,244 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 15:53:10,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:53:10,245 INFO L225 Difference]: With dead ends: 84 [2022-11-16 15:53:10,245 INFO L226 Difference]: Without dead ends: 64 [2022-11-16 15:53:10,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-11-16 15:53:10,246 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 44 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 15:53:10,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 36 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 15:53:10,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-16 15:53:10,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2022-11-16 15:53:10,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:10,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2022-11-16 15:53:10,258 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 18 [2022-11-16 15:53:10,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:53:10,259 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2022-11-16 15:53:10,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:10,259 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2022-11-16 15:53:10,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 15:53:10,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:53:10,260 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:53:10,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 15:53:10,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:10,466 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:53:10,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:53:10,466 INFO L85 PathProgramCache]: Analyzing trace with hash -423339907, now seen corresponding path program 6 times [2022-11-16 15:53:10,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:53:10,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114125021] [2022-11-16 15:53:10,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:10,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:53:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 15:53:10,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:53:10,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114125021] [2022-11-16 15:53:10,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114125021] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:53:10,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630068956] [2022-11-16 15:53:10,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 15:53:10,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:10,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:53:10,601 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:53:10,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 15:53:10,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 15:53:10,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 15:53:10,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 15:53:10,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:53:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 15:53:10,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:53:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 15:53:10,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630068956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:53:10,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1179443292] [2022-11-16 15:53:10,828 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 15:53:10,829 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:53:10,829 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:53:10,829 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:53:10,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:53:10,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:10,889 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 15:53:10,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-11-16 15:53:10,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:10,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:10,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:11,054 INFO L321 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-11-16 15:53:11,054 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 15:53:11,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:11,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:11,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:11,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:11,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:11,247 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-16 15:53:11,247 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 15:53:11,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:11,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:11,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2022-11-16 15:53:11,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:11,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:11,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:11,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:11,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:11,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:11,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:11,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:11,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:11,530 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-16 15:53:11,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 35 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 523 treesize of output 517 [2022-11-16 15:53:11,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 15:53:11,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:11,842 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 15:53:11,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 15:53:11,914 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 15:53:11,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 15:53:11,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:11,979 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 15:53:11,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 15:53:12,048 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 15:53:12,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 15:53:12,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:12,086 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-16 15:53:12,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-16 15:53:12,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:12,129 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-16 15:53:12,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-16 15:53:12,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:12,162 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-16 15:53:12,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-16 15:53:12,179 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:53:12,568 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1517#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 15:53:12,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:53:12,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 15:53:12,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-16 15:53:12,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495657616] [2022-11-16 15:53:12,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 15:53:12,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 15:53:12,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:53:12,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 15:53:12,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-16 15:53:12,570 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:12,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:53:12,831 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2022-11-16 15:53:12,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 15:53:12,831 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 15:53:12,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:53:12,833 INFO L225 Difference]: With dead ends: 67 [2022-11-16 15:53:12,833 INFO L226 Difference]: Without dead ends: 54 [2022-11-16 15:53:12,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-11-16 15:53:12,834 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 15:53:12,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 62 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 15:53:12,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-16 15:53:12,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2022-11-16 15:53:12,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-11-16 15:53:12,844 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 18 [2022-11-16 15:53:12,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:53:12,844 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-11-16 15:53:12,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:12,844 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-11-16 15:53:12,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 15:53:12,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:53:12,845 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:53:12,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 15:53:13,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:13,051 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:53:13,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:53:13,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1748691183, now seen corresponding path program 1 times [2022-11-16 15:53:13,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:53:13,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682023203] [2022-11-16 15:53:13,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:13,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:53:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:53:15,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:53:15,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682023203] [2022-11-16 15:53:15,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682023203] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:53:15,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194167991] [2022-11-16 15:53:15,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:15,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:15,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:53:15,232 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:53:15,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 15:53:15,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:15,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 15:53:15,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:53:15,356 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 15:53:15,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2022-11-16 15:53:15,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 15:53:15,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 15:53:15,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:15,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-16 15:53:15,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:15,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:15,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-11-16 15:53:15,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:15,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-11-16 15:53:15,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:15,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:15,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 42 [2022-11-16 15:53:16,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:16,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 37 [2022-11-16 15:53:16,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:16,253 INFO L321 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2022-11-16 15:53:16,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 52 [2022-11-16 15:53:16,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:16,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:16,368 INFO L321 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-11-16 15:53:16,368 INFO L350 Elim1Store]: Elim1 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 41 treesize of output 42 [2022-11-16 15:53:16,678 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-11-16 15:53:16,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 39 [2022-11-16 15:53:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:53:16,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:53:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:53:18,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194167991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:53:18,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1880678719] [2022-11-16 15:53:18,987 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-16 15:53:18,987 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:53:18,988 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:53:18,988 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:53:18,988 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:53:19,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,140 INFO L321 Elim1Store]: treesize reduction 146, result has 25.1 percent of original size [2022-11-16 15:53:19,140 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 15:53:19,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,188 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 15:53:19,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-11-16 15:53:19,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,368 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-16 15:53:19,369 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 15:53:19,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-11-16 15:53:19,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:19,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:19,651 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-16 15:53:19,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 528 treesize of output 516 [2022-11-16 15:53:19,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 15:53:19,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:19,847 INFO L321 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2022-11-16 15:53:19,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2022-11-16 15:53:19,906 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 15:53:19,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 15:53:19,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:19,948 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 15:53:19,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-16 15:53:20,007 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 15:53:20,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 15:53:20,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:20,056 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-16 15:53:20,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-16 15:53:20,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:20,095 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-16 15:53:20,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-16 15:53:20,224 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:53:21,303 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1865#(and (<= 0 ~N~0) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 15:53:21,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:53:21,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 15:53:21,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 46 [2022-11-16 15:53:21,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589287424] [2022-11-16 15:53:21,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 15:53:21,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-16 15:53:21,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:53:21,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-16 15:53:21,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2427, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 15:53:21,307 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 46 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 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) [2022-11-16 15:53:34,696 WARN L233 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 152 DAG size of output: 137 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 15:53:34,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:53:34,845 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2022-11-16 15:53:34,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 15:53:34,845 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 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 [2022-11-16 15:53:34,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:53:34,846 INFO L225 Difference]: With dead ends: 39 [2022-11-16 15:53:34,846 INFO L226 Difference]: Without dead ends: 23 [2022-11-16 15:53:34,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=275, Invalid=2917, Unknown=0, NotChecked=0, Total=3192 [2022-11-16 15:53:34,848 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 15:53:34,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 289 Invalid, 0 Unknown, 33 Unchecked, 0.7s Time] [2022-11-16 15:53:34,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-16 15:53:34,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-16 15:53:34,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:53:34,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-16 15:53:34,856 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 20 [2022-11-16 15:53:34,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:53:34,857 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-16 15:53:34,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 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) [2022-11-16 15:53:34,857 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-16 15:53:34,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 15:53:34,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:53:34,858 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:53:34,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 15:53:35,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:35,065 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:53:35,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:53:35,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1643001400, now seen corresponding path program 7 times [2022-11-16 15:53:35,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:53:35,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905830782] [2022-11-16 15:53:35,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:53:35,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:53:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:53:37,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:53:37,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905830782] [2022-11-16 15:53:37,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905830782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:53:37,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521500861] [2022-11-16 15:53:37,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 15:53:37,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:53:37,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:53:37,386 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:53:37,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 15:53:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:53:37,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-16 15:53:37,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:53:37,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 15:53:37,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 15:53:37,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 15:53:37,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:37,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-16 15:53:37,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:37,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:37,610 INFO L350 Elim1Store]: Elim1 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 37 treesize of output 42 [2022-11-16 15:53:37,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:37,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:37,700 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 45 [2022-11-16 15:53:37,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:37,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:37,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:37,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:37,806 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 47 [2022-11-16 15:53:37,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:37,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:37,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 49 [2022-11-16 15:53:38,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:38,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:38,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:38,154 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 55 [2022-11-16 15:53:38,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:38,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:38,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:38,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:53:38,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 60 [2022-11-16 15:53:38,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:38,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-11-16 15:53:38,681 INFO L321 Elim1Store]: treesize reduction 32, result has 45.8 percent of original size [2022-11-16 15:53:38,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 44 [2022-11-16 15:53:38,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:38,909 INFO L321 Elim1Store]: treesize reduction 55, result has 27.6 percent of original size [2022-11-16 15:53:38,910 INFO L350 Elim1Store]: Elim1 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 44 treesize of output 63 [2022-11-16 15:53:39,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:53:39,098 INFO L321 Elim1Store]: treesize reduction 51, result has 25.0 percent of original size [2022-11-16 15:53:39,099 INFO L350 Elim1Store]: Elim1 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 41 treesize of output 56 [2022-11-16 15:53:39,391 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 15:53:39,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 68 [2022-11-16 15:53:39,441 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:53:39,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:54:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:54:07,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521500861] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:54:07,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2084675392] [2022-11-16 15:54:07,706 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 15:54:07,706 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:54:07,706 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:54:07,706 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:54:07,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:54:07,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:07,755 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 15:54:07,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 112 [2022-11-16 15:54:07,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:07,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:07,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:07,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:07,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:07,936 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-16 15:54:07,936 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 15:54:07,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:07,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:07,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:07,973 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 15:54:08,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-11-16 15:54:08,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:08,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:08,279 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-16 15:54:08,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 528 treesize of output 516 [2022-11-16 15:54:08,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 15:54:08,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:08,456 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 15:54:08,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 15:54:08,529 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 15:54:08,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 15:54:08,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:08,594 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 15:54:08,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-16 15:54:08,657 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 15:54:08,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 15:54:08,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:08,692 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-16 15:54:08,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-16 15:54:08,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:08,731 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-16 15:54:08,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-16 15:54:08,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:08,773 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-16 15:54:08,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-16 15:54:08,787 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:54:09,528 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2158#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 15:54:09,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:54:09,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 15:54:09,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 50 [2022-11-16 15:54:09,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841136821] [2022-11-16 15:54:09,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 15:54:09,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-16 15:54:09,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:54:09,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-16 15:54:09,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2740, Unknown=7, NotChecked=0, Total=2970 [2022-11-16 15:54:09,530 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 50 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:54:11,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:54:11,429 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2022-11-16 15:54:11,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 15:54:11,429 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 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 [2022-11-16 15:54:11,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:54:11,430 INFO L225 Difference]: With dead ends: 63 [2022-11-16 15:54:11,430 INFO L226 Difference]: Without dead ends: 49 [2022-11-16 15:54:11,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=326, Invalid=3827, Unknown=7, NotChecked=0, Total=4160 [2022-11-16 15:54:11,432 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 15:54:11,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 41 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 259 Invalid, 0 Unknown, 66 Unchecked, 0.5s Time] [2022-11-16 15:54:11,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-16 15:54:11,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2022-11-16 15:54:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:54:11,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2022-11-16 15:54:11,446 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 21 [2022-11-16 15:54:11,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:54:11,446 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2022-11-16 15:54:11,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:54:11,447 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2022-11-16 15:54:11,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 15:54:11,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:54:11,448 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:54:11,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-16 15:54:11,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 15:54:11,651 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:54:11,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:54:11,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1877723777, now seen corresponding path program 8 times [2022-11-16 15:54:11,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:54:11,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143491919] [2022-11-16 15:54:11,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:11,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:54:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 15:54:11,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:54:11,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143491919] [2022-11-16 15:54:11,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143491919] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:54:11,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022763201] [2022-11-16 15:54:11,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 15:54:11,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:54:11,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:54:11,824 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:54:11,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 15:54:11,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 15:54:11,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 15:54:11,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 15:54:11,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:54:12,088 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 15:54:12,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:54:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 15:54:12,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022763201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:54:12,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1594510000] [2022-11-16 15:54:12,184 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 15:54:12,184 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:54:12,184 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:54:12,185 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:54:12,185 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:54:12,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:12,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:12,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:12,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:12,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:12,365 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-16 15:54:12,366 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 15:54:12,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:12,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-16 15:54:12,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:12,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:12,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:12,439 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 15:54:12,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:12,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:12,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 118 [2022-11-16 15:54:12,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:12,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:12,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:12,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:12,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:12,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:12,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:12,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:12,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:12,724 INFO L321 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2022-11-16 15:54:12,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 35 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 25 case distinctions, treesize of input 523 treesize of output 517 [2022-11-16 15:54:12,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 15:54:12,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:12,939 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 15:54:12,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 15:54:13,014 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 15:54:13,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 15:54:13,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:13,092 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 15:54:13,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 15:54:13,168 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 15:54:13,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 15:54:13,217 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-11-16 15:54:13,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-11-16 15:54:13,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:13,264 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-16 15:54:13,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-16 15:54:13,315 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:54:13,904 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2520#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.offset|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 15:54:13,904 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:54:13,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 15:54:13,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-16 15:54:13,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140183572] [2022-11-16 15:54:13,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 15:54:13,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 15:54:13,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:54:13,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 15:54:13,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2022-11-16 15:54:13,906 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 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) [2022-11-16 15:54:14,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:54:14,316 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2022-11-16 15:54:14,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 15:54:14,317 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 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) Word has length 22 [2022-11-16 15:54:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:54:14,317 INFO L225 Difference]: With dead ends: 97 [2022-11-16 15:54:14,317 INFO L226 Difference]: Without dead ends: 82 [2022-11-16 15:54:14,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2022-11-16 15:54:14,319 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 90 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 15:54:14,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 123 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 15:54:14,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-16 15:54:14,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 42. [2022-11-16 15:54:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 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) [2022-11-16 15:54:14,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-11-16 15:54:14,333 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 22 [2022-11-16 15:54:14,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:54:14,333 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-11-16 15:54:14,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 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) [2022-11-16 15:54:14,333 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-11-16 15:54:14,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 15:54:14,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:54:14,334 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:54:14,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-16 15:54:14,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 15:54:14,543 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:54:14,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:54:14,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1382396604, now seen corresponding path program 9 times [2022-11-16 15:54:14,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:54:14,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816355132] [2022-11-16 15:54:14,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:14,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:54:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 15:54:14,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:54:14,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816355132] [2022-11-16 15:54:14,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816355132] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:54:14,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853905937] [2022-11-16 15:54:14,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 15:54:14,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:54:14,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:54:14,730 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:54:14,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 15:54:14,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 15:54:14,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 15:54:14,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 15:54:14,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:54:14,948 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 15:54:14,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:54:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 15:54:15,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853905937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 15:54:15,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1946800439] [2022-11-16 15:54:15,020 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 15:54:15,021 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 15:54:15,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 15:54:15,021 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 15:54:15,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 15:54:15,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,205 INFO L321 Elim1Store]: treesize reduction 182, result has 22.6 percent of original size [2022-11-16 15:54:15,206 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 15:54:15,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,233 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 15:54:15,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 32 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2022-11-16 15:54:15,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 38 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 123 [2022-11-16 15:54:15,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:15,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:15,543 INFO L321 Elim1Store]: treesize reduction 166, result has 11.7 percent of original size [2022-11-16 15:54:15,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 24 case distinctions, treesize of input 528 treesize of output 516 [2022-11-16 15:54:15,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 15:54:15,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:15,758 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 15:54:15,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-16 15:54:15,844 INFO L321 Elim1Store]: treesize reduction 29, result has 60.8 percent of original size [2022-11-16 15:54:15,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 54 [2022-11-16 15:54:15,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:15,931 INFO L321 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2022-11-16 15:54:15,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 34 [2022-11-16 15:54:16,013 INFO L321 Elim1Store]: treesize reduction 24, result has 62.5 percent of original size [2022-11-16 15:54:16,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 54 [2022-11-16 15:54:16,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:16,046 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-16 15:54:16,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-16 15:54:16,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:16,088 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-16 15:54:16,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-16 15:54:16,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:16,130 INFO L321 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2022-11-16 15:54:16,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-11-16 15:54:16,167 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 15:54:16,612 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2923#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= ~N~0 2147483647) (= |ULTIMATE.start_main_~#sum~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (< |ULTIMATE.start_main_~i~0#1| ~N~0) (= (select (select |#memory_int| |ULTIMATE.start_main_~b~0#1.base|) (+ |ULTIMATE.start_main_~b~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 8))) |ULTIMATE.start_main_#t~mem17#1|) (= |ULTIMATE.start_main_~b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem17#1| (+ 2 ~N~0)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#sum~0#1.base|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-16 15:54:16,612 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 15:54:16,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 15:54:16,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 17 [2022-11-16 15:54:16,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236251748] [2022-11-16 15:54:16,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 15:54:16,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 15:54:16,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 15:54:16,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 15:54:16,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-11-16 15:54:16,617 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2022-11-16 15:54:16,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 15:54:16,845 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2022-11-16 15:54:16,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 15:54:16,846 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 23 [2022-11-16 15:54:16,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 15:54:16,847 INFO L225 Difference]: With dead ends: 87 [2022-11-16 15:54:16,847 INFO L226 Difference]: Without dead ends: 71 [2022-11-16 15:54:16,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2022-11-16 15:54:16,848 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 89 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 15:54:16,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 45 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 15:54:16,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-16 15:54:16,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 47. [2022-11-16 15:54:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 15:54:16,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2022-11-16 15:54:16,864 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 23 [2022-11-16 15:54:16,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 15:54:16,864 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2022-11-16 15:54:16,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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) [2022-11-16 15:54:16,864 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2022-11-16 15:54:16,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 15:54:16,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 15:54:16,865 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 15:54:16,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 15:54:17,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:54:17,073 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 15:54:17,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 15:54:17,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1212573997, now seen corresponding path program 2 times [2022-11-16 15:54:17,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 15:54:17,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850394613] [2022-11-16 15:54:17,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 15:54:17,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 15:54:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 15:54:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 15:54:20,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 15:54:20,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850394613] [2022-11-16 15:54:20,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850394613] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 15:54:20,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744096651] [2022-11-16 15:54:20,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 15:54:20,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 15:54:20,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 15:54:20,738 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 15:54:20,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e4c91fb-136d-497e-bdcd-46b0dec59581/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 15:54:20,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 15:54:20,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 15:54:20,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-16 15:54:20,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 15:54:20,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2022-11-16 15:54:20,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-16 15:54:21,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:21,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 15:54:21,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:21,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:21,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:21,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-11-16 15:54:21,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:21,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-16 15:54:21,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:21,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-16 15:54:21,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:21,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:21,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-16 15:54:21,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:21,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:21,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:21,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 37 [2022-11-16 15:54:21,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:21,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:21,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-11-16 15:54:21,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:21,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:21,794 INFO L321 Elim1Store]: treesize reduction 30, result has 49.2 percent of original size [2022-11-16 15:54:21,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 55 [2022-11-16 15:54:22,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:22,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:22,217 INFO L321 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2022-11-16 15:54:22,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 51 [2022-11-16 15:54:22,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:22,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:22,444 INFO L321 Elim1Store]: treesize reduction 82, result has 23.4 percent of original size [2022-11-16 15:54:22,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 69 treesize of output 75 [2022-11-16 15:54:22,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 15:54:22,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 15:54:22,912 INFO L321 Elim1Store]: treesize reduction 226, result has 39.9 percent of original size [2022-11-16 15:54:22,913 INFO L350 Elim1Store]: Elim1 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 28 case distinctions, treesize of input 120 treesize of output 205 [2022-11-16 15:54:27,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 15:54:27,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 144 treesize of output 188 [2022-11-16 15:54:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 15:54:28,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 15:54:41,869 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 15:54:41,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1004 treesize of output 812 [2022-11-16 15:54:41,914 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~i~0#1_410| Int) (v_ArrVal_761 Int) (v_arrayElimArr_1 (Array Int Int)) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (|v_ULTIMATE.start_main_~i~0#1_414| Int) (v_ArrVal_766 Int)) (let ((.cse2 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|))) (let ((.cse0 (+ c_~N~0 2)) (.cse1 (store (let ((.cse5 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse6 (store (let ((.cse9 (select .cse7 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse8 (store .cse9 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select .cse9 |c_ULTIMATE.start_main_~a~0#1.offset|) (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse8 .cse5 (+ (select .cse9 .cse5) (select (select (store .cse7 |c_ULTIMATE.start_main_~a~0#1.base| .cse8) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_414|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_761))) (let ((.cse4 (store .cse7 |c_ULTIMATE.start_main_~a~0#1.base| .cse6))) (let ((.cse3 (store (select .cse4 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| (+ (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))) (store .cse3 .cse2 (+ (select (select (store .cse4 |c_ULTIMATE.start_main_~b~0#1.base| .cse3) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) 1)))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_410|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_766))) (or (< (+ |v_ULTIMATE.start_main_~i~0#1_410| 1) c_~N~0) (< (+ |v_ULTIMATE.start_main_~i~0#1_414| 1) c_~N~0) (= .cse0 (select .cse1 .cse2)) (not (= .cse0 (select .cse1 |c_ULTIMATE.start_main_~b~0#1.offset|))))))) (not (< 1 c_~N~0))) is different from false [2022-11-16 15:54:45,112 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_422| Int) (|v_ULTIMATE.start_main_~i~0#1_410| Int) (v_ArrVal_751 Int) (v_ArrVal_761 Int) (v_arrayElimArr_1 (Array Int Int)) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (|v_ULTIMATE.start_main_~i~0#1_414| Int) (v_ArrVal_766 Int)) (let ((.cse2 (+ 8 |c_ULTIMATE.start_main_~b~0#1.offset|))) (let ((.cse1 (store (let ((.cse5 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse7 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_422|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_751)) |c_ULTIMATE.start_main_~#sum~0#1.base| v_arrayElimArr_1))) (let ((.cse6 (store (let ((.cse9 (select .cse7 |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse8 (store .cse9 |c_ULTIMATE.start_main_~a~0#1.offset| (+ (select v_arrayElimArr_1 |ULTIMATE.start_main_~#sum~0#1.offset|) (select .cse9 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (store .cse8 .cse5 (+ (select .cse9 .cse5) (select (select (store .cse7 |c_ULTIMATE.start_main_~a~0#1.base| .cse8) |c_ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_414|) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_761))) (let ((.cse4 (store .cse7 |c_ULTIMATE.start_main_~a~0#1.base| .cse6))) (let ((.cse3 (store (select .cse4 |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset| (+ (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|) 1)))) (store .cse3 .cse2 (+ (select (select (store .cse4 |c_ULTIMATE.start_main_~b~0#1.base| .cse3) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5) 1)))))) (+ (* 8 |v_ULTIMATE.start_main_~i~0#1_410|) |c_ULTIMATE.start_main_~b~0#1.offset|) v_ArrVal_766))) (let ((.cse0 (select .cse1 |c_ULTIMATE.start_main_~b~0#1.offset|))) (or (not (< 3 .cse0)) (not (< (+ 2 |v_ULTIMATE.start_main_~i~0#1_422|) .cse0)) (= .cse0 (select .cse1 .cse2)) (< (+ 3 |v_ULTIMATE.start_main_~i~0#1_422|) .cse0) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_422|)) (< (+ 3 |v_ULTIMATE.start_main_~i~0#1_410|) .cse0) (< (+ 3 |v_ULTIMATE.start_main_~i~0#1_414|) .cse0)))))) is different from false [2022-11-16 15:54:45,295 INFO L321 Elim1Store]: treesize reduction 63, result has 37.6 percent of original size [2022-11-16 15:54:45,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 9180 treesize of output 2980 [2022-11-16 15:54:45,427 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 15:54:45,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56308 treesize of output 51800 [2022-11-16 15:54:46,110 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 15:54:46,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 53521 treesize of output 48643 [2022-11-16 15:54:47,877 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 15:54:47,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 31146 treesize of output 29350