./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/vnew1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/vnew1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh --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 92c9725cc4c9709a9ab81826fb3481ef81541ab6f68244b6727f50e97bc0f0c0 --- 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-2329fc7 [2022-12-14 06:01:16,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:01:16,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:01:16,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:01:16,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:01:16,213 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:01:16,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:01:16,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:01:16,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:01:16,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:01:16,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:01:16,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:01:16,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:01:16,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:01:16,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:01:16,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:01:16,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:01:16,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:01:16,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:01:16,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:01:16,229 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:01:16,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:01:16,231 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:01:16,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:01:16,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:01:16,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:01:16,235 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:01:16,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:01:16,237 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:01:16,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:01:16,238 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:01:16,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:01:16,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:01:16,240 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:01:16,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:01:16,241 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:01:16,241 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:01:16,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:01:16,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:01:16,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:01:16,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:01:16,243 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:01:16,262 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:01:16,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:01:16,263 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:01:16,263 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:01:16,264 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:01:16,264 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:01:16,264 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:01:16,264 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:01:16,265 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:01:16,265 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:01:16,265 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:01:16,265 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:01:16,265 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:01:16,265 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:01:16,265 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:01:16,266 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:01:16,266 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:01:16,266 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:01:16,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:01:16,267 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:01:16,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:01:16,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:01:16,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:01:16,267 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:01:16,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:01:16,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:01:16,268 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:01:16,268 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:01:16,268 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:01:16,268 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:01:16,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:01:16,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:01:16,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:01:16,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:01:16,269 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:01:16,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:01:16,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:01:16,270 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:01:16,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:01:16,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:01:16,270 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:01:16,270 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_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92c9725cc4c9709a9ab81826fb3481ef81541ab6f68244b6727f50e97bc0f0c0 [2022-12-14 06:01:16,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:01:16,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:01:16,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:01:16,496 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:01:16,496 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:01:16,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/loops-crafted-1/vnew1.c [2022-12-14 06:01:19,050 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:01:19,189 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:01:19,190 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/sv-benchmarks/c/loops-crafted-1/vnew1.c [2022-12-14 06:01:19,194 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/data/0c5318481/36d4dbaac56341798190acae373c9bd3/FLAG51ffbe9e9 [2022-12-14 06:01:19,204 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/data/0c5318481/36d4dbaac56341798190acae373c9bd3 [2022-12-14 06:01:19,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:01:19,207 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:01:19,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:01:19,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:01:19,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:01:19,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:01:19" (1/1) ... [2022-12-14 06:01:19,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d546405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:19, skipping insertion in model container [2022-12-14 06:01:19,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:01:19" (1/1) ... [2022-12-14 06:01:19,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:01:19,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:01:19,327 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/sv-benchmarks/c/loops-crafted-1/vnew1.c[403,416] [2022-12-14 06:01:19,339 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:01:19,346 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:01:19,355 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/sv-benchmarks/c/loops-crafted-1/vnew1.c[403,416] [2022-12-14 06:01:19,358 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:01:19,367 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:01:19,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:19 WrapperNode [2022-12-14 06:01:19,368 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:01:19,369 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:01:19,369 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:01:19,369 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:01:19,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:19" (1/1) ... [2022-12-14 06:01:19,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:19" (1/1) ... [2022-12-14 06:01:19,391 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 57 [2022-12-14 06:01:19,392 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:01:19,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:01:19,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:01:19,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:01:19,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:19" (1/1) ... [2022-12-14 06:01:19,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:19" (1/1) ... [2022-12-14 06:01:19,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:19" (1/1) ... [2022-12-14 06:01:19,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:19" (1/1) ... [2022-12-14 06:01:19,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:19" (1/1) ... [2022-12-14 06:01:19,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:19" (1/1) ... [2022-12-14 06:01:19,405 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:19" (1/1) ... [2022-12-14 06:01:19,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:19" (1/1) ... [2022-12-14 06:01:19,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:01:19,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:01:19,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:01:19,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:01:19,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:19" (1/1) ... [2022-12-14 06:01:19,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:01:19,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:01:19,432 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:01:19,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:01:19,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:01:19,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:01:19,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:01:19,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:01:19,509 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:01:19,511 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:01:19,597 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:01:19,616 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:01:19,616 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 06:01:19,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:01:19 BoogieIcfgContainer [2022-12-14 06:01:19,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:01:19,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:01:19,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:01:19,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:01:19,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:01:19" (1/3) ... [2022-12-14 06:01:19,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aba5a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:01:19, skipping insertion in model container [2022-12-14 06:01:19,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:01:19" (2/3) ... [2022-12-14 06:01:19,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aba5a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:01:19, skipping insertion in model container [2022-12-14 06:01:19,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:01:19" (3/3) ... [2022-12-14 06:01:19,624 INFO L112 eAbstractionObserver]: Analyzing ICFG vnew1.c [2022-12-14 06:01:19,638 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:01:19,638 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:01:19,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:01:19,676 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;@6e6a9e11, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:01:19,676 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:01:19,679 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:19,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 06:01:19,683 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:01:19,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 06:01:19,684 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:01:19,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:01:19,688 INFO L85 PathProgramCache]: Analyzing trace with hash -2025251484, now seen corresponding path program 1 times [2022-12-14 06:01:19,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:01:19,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107905756] [2022-12-14 06:01:19,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:01:19,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:01:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:01:20,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:20,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:01:20,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107905756] [2022-12-14 06:01:20,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107905756] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:01:20,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:01:20,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 06:01:20,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745708793] [2022-12-14 06:01:20,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:01:20,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:01:20,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:01:20,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:01:20,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:01:20,124 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 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) [2022-12-14 06:01:20,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:01:20,278 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-12-14 06:01:20,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:01:20,280 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 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 6 [2022-12-14 06:01:20,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:01:20,285 INFO L225 Difference]: With dead ends: 26 [2022-12-14 06:01:20,286 INFO L226 Difference]: Without dead ends: 13 [2022-12-14 06:01:20,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-14 06:01:20,290 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:01:20,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 10 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:01:20,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-12-14 06:01:20,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2022-12-14 06:01:20,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:20,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-12-14 06:01:20,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 6 [2022-12-14 06:01:20,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:01:20,316 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-12-14 06:01:20,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 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) [2022-12-14 06:01:20,317 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-12-14 06:01:20,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 06:01:20,317 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:01:20,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:01:20,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:01:20,317 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:01:20,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:01:20,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1610042692, now seen corresponding path program 1 times [2022-12-14 06:01:20,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:01:20,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529908982] [2022-12-14 06:01:20,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:01:20,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:01:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:01:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:20,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:01:20,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529908982] [2022-12-14 06:01:20,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529908982] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:01:20,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681112241] [2022-12-14 06:01:20,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:01:20,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:01:20,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:01:20,575 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:01:20,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:01:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:01:20,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 06:01:20,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:01:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:20,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:01:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:21,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681112241] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:01:21,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1812721745] [2022-12-14 06:01:21,408 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 06:01:21,409 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:01:21,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:01:21,417 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:01:21,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:01:21,528 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:01:21,749 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '130#(and (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (not (< (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< 0 (mod |ULTIMATE.start_main_~k~0#1| 4294967296)) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:01:21,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:01:21,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:01:21,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 06:01:21,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37159242] [2022-12-14 06:01:21,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:01:21,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 06:01:21,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:01:21,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 06:01:21,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-12-14 06:01:21,753 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:22,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:01:22,186 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2022-12-14 06:01:22,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 06:01:22,186 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 06:01:22,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:01:22,187 INFO L225 Difference]: With dead ends: 30 [2022-12-14 06:01:22,187 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 06:01:22,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-12-14 06:01:22,188 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:01:22,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 20 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:01:22,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 06:01:22,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 17. [2022-12-14 06:01:22,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:22,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-12-14 06:01:22,198 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 7 [2022-12-14 06:01:22,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:01:22,198 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-12-14 06:01:22,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:22,198 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-12-14 06:01:22,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 06:01:22,199 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:01:22,199 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-14 06:01:22,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:01:22,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:01:22,400 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:01:22,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:01:22,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1497765220, now seen corresponding path program 2 times [2022-12-14 06:01:22,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:01:22,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687973543] [2022-12-14 06:01:22,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:01:22,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:01:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:01:22,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:22,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:01:22,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687973543] [2022-12-14 06:01:22,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687973543] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:01:22,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296702468] [2022-12-14 06:01:22,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:01:22,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:01:22,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:01:22,704 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:01:22,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:01:22,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:01:22,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:01:22,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 06:01:22,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:01:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:22,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:01:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:23,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296702468] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:01:23,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1364324177] [2022-12-14 06:01:23,055 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 06:01:23,055 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:01:23,055 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:01:23,055 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:01:23,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:01:23,136 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:01:23,375 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '299#(and (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (not (< (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< 0 (mod |ULTIMATE.start_main_~k~0#1| 4294967296)) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:01:23,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:01:23,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:01:23,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-12-14 06:01:23,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705192903] [2022-12-14 06:01:23,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:01:23,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 06:01:23,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:01:23,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 06:01:23,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-12-14 06:01:23,377 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:25,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:01:25,990 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-12-14 06:01:25,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-14 06:01:25,990 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 06:01:25,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:01:25,992 INFO L225 Difference]: With dead ends: 68 [2022-12-14 06:01:25,992 INFO L226 Difference]: Without dead ends: 66 [2022-12-14 06:01:25,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=579, Invalid=2391, Unknown=0, NotChecked=0, Total=2970 [2022-12-14 06:01:25,995 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 202 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:01:25,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 39 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 06:01:25,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-14 06:01:26,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 24. [2022-12-14 06:01:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:26,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 36 transitions. [2022-12-14 06:01:26,006 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 36 transitions. Word has length 10 [2022-12-14 06:01:26,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:01:26,007 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 36 transitions. [2022-12-14 06:01:26,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:01:26,007 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 36 transitions. [2022-12-14 06:01:26,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 06:01:26,007 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:01:26,007 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:01:26,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:01:26,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:01:26,209 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:01:26,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:01:26,211 INFO L85 PathProgramCache]: Analyzing trace with hash 543513786, now seen corresponding path program 1 times [2022-12-14 06:01:26,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:01:26,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375780864] [2022-12-14 06:01:26,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:01:26,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:01:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:01:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:26,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:01:26,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375780864] [2022-12-14 06:01:26,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375780864] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:01:26,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340586742] [2022-12-14 06:01:26,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:01:26,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:01:26,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:01:26,590 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:01:26,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:01:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:01:26,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 06:01:26,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:01:26,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:26,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:01:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:27,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340586742] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:01:27,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1941614424] [2022-12-14 06:01:27,030 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 06:01:27,030 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:01:27,030 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:01:27,030 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:01:27,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:01:27,141 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:01:27,424 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '599#(and (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< 0 (mod |ULTIMATE.start_main_~k~0#1| 4294967296)) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:01:27,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:01:27,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:01:27,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-12-14 06:01:27,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376554052] [2022-12-14 06:01:27,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:01:27,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 06:01:27,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:01:27,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 06:01:27,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-12-14 06:01:27,426 INFO L87 Difference]: Start difference. First operand 24 states and 36 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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) [2022-12-14 06:01:31,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:01:31,127 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2022-12-14 06:01:31,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 06:01:31,127 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 06:01:31,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:01:31,128 INFO L225 Difference]: With dead ends: 73 [2022-12-14 06:01:31,128 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 06:01:31,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=724, Invalid=3566, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 06:01:31,129 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 172 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:01:31,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 65 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 06:01:31,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 06:01:31,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 27. [2022-12-14 06:01:31,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 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) [2022-12-14 06:01:31,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2022-12-14 06:01:31,144 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 11 [2022-12-14 06:01:31,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:01:31,144 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2022-12-14 06:01:31,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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) [2022-12-14 06:01:31,144 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2022-12-14 06:01:31,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 06:01:31,145 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:01:31,145 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:01:31,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:01:31,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:01:31,345 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:01:31,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:01:31,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1573086394, now seen corresponding path program 2 times [2022-12-14 06:01:31,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:01:31,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623499189] [2022-12-14 06:01:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:01:31,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:01:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:01:31,659 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:31,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:01:31,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623499189] [2022-12-14 06:01:31,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623499189] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:01:31,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719464528] [2022-12-14 06:01:31,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:01:31,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:01:31,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:01:31,661 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:01:31,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:01:31,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 06:01:31,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:01:31,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 06:01:31,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:01:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:32,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:01:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:32,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719464528] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:01:32,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1642632454] [2022-12-14 06:01:32,771 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 06:01:32,771 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:01:32,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:01:32,772 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:01:32,772 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:01:32,869 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:01:33,228 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '959#(and (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< 0 (mod |ULTIMATE.start_main_~k~0#1| 4294967296)) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:01:33,228 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:01:33,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:01:33,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2022-12-14 06:01:33,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477851731] [2022-12-14 06:01:33,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:01:33,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 06:01:33,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:01:33,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 06:01:33,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 06:01:33,230 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand has 31 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) [2022-12-14 06:01:35,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:01:46,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:01:46,458 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2022-12-14 06:01:46,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-14 06:01:46,458 INFO L78 Accepts]: Start accepts. Automaton has has 31 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) Word has length 15 [2022-12-14 06:01:46,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:01:46,459 INFO L225 Difference]: With dead ends: 116 [2022-12-14 06:01:46,459 INFO L226 Difference]: Without dead ends: 114 [2022-12-14 06:01:46,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1880 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=1435, Invalid=6047, Unknown=0, NotChecked=0, Total=7482 [2022-12-14 06:01:46,462 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 324 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-12-14 06:01:46,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 69 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-12-14 06:01:46,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-12-14 06:01:46,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 38. [2022-12-14 06:01:46,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 37 states have internal predecessors, (57), 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) [2022-12-14 06:01:46,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 57 transitions. [2022-12-14 06:01:46,490 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 57 transitions. Word has length 15 [2022-12-14 06:01:46,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:01:46,490 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 57 transitions. [2022-12-14 06:01:46,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 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) [2022-12-14 06:01:46,490 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 57 transitions. [2022-12-14 06:01:46,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 06:01:46,491 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:01:46,491 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 06:01:46,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:01:46,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:01:46,693 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:01:46,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:01:46,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1965317756, now seen corresponding path program 3 times [2022-12-14 06:01:46,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:01:46,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182767378] [2022-12-14 06:01:46,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:01:46,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:01:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:01:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:47,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:01:47,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182767378] [2022-12-14 06:01:47,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182767378] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:01:47,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005738992] [2022-12-14 06:01:47,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:01:47,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:01:47,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:01:47,218 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:01:47,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:01:47,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:01:47,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:01:47,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 06:01:47,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:01:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:47,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:01:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:01:51,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005738992] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:01:51,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1602356788] [2022-12-14 06:01:51,462 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 06:01:51,462 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:01:51,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:01:51,462 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:01:51,462 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:01:51,531 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:01:51,962 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1433#(and (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< 0 (mod |ULTIMATE.start_main_~k~0#1| 4294967296)) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:01:51,962 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:01:51,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:01:51,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 30 [2022-12-14 06:01:51,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403101178] [2022-12-14 06:01:51,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:01:51,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 06:01:51,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:01:51,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 06:01:51,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1051, Unknown=1, NotChecked=0, Total=1260 [2022-12-14 06:01:51,964 INFO L87 Difference]: Start difference. First operand 38 states and 57 transitions. Second operand has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 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) [2022-12-14 06:02:02,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:02:02,204 INFO L93 Difference]: Finished difference Result 116 states and 140 transitions. [2022-12-14 06:02:02,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-14 06:02:02,204 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 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) Word has length 15 [2022-12-14 06:02:02,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:02:02,205 INFO L225 Difference]: With dead ends: 116 [2022-12-14 06:02:02,205 INFO L226 Difference]: Without dead ends: 114 [2022-12-14 06:02:02,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=1044, Invalid=4961, Unknown=1, NotChecked=0, Total=6006 [2022-12-14 06:02:02,207 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 193 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:02:02,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 39 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 06:02:02,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-12-14 06:02:02,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 44. [2022-12-14 06:02:02,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 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) [2022-12-14 06:02:02,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 63 transitions. [2022-12-14 06:02:02,246 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 63 transitions. Word has length 15 [2022-12-14 06:02:02,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:02:02,246 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 63 transitions. [2022-12-14 06:02:02,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 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) [2022-12-14 06:02:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 63 transitions. [2022-12-14 06:02:02,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 06:02:02,247 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:02:02,247 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1] [2022-12-14 06:02:02,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:02:02,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 06:02:02,449 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:02:02,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:02:02,450 INFO L85 PathProgramCache]: Analyzing trace with hash -712243868, now seen corresponding path program 3 times [2022-12-14 06:02:02,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:02:02,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911932568] [2022-12-14 06:02:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:02:02,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:02:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:02:02,946 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:02:02,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:02:02,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911932568] [2022-12-14 06:02:02,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911932568] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:02:02,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170968068] [2022-12-14 06:02:02,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:02:02,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:02:02,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:02:02,948 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:02:02,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:02:03,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:02:03,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:02:03,074 WARN L261 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-14 06:02:03,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:02:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:02:03,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:02:04,143 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:02:04,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170968068] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:02:04,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [825224428] [2022-12-14 06:02:04,144 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 06:02:04,144 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:02:04,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:02:04,145 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:02:04,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:02:04,189 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:02:04,612 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1942#(and (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (not (< (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (mod |ULTIMATE.start_main_~n~0#1| 4294967296))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< 0 (mod |ULTIMATE.start_main_~k~0#1| 4294967296)) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:02:04,612 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:02:04,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:02:04,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2022-12-14 06:02:04,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935100629] [2022-12-14 06:02:04,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:02:04,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 06:02:04,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:02:04,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 06:02:04,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=2007, Unknown=0, NotChecked=0, Total=2450 [2022-12-14 06:02:04,614 INFO L87 Difference]: Start difference. First operand 44 states and 63 transitions. Second operand has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 states have internal predecessors, (51), 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) [2022-12-14 06:02:37,722 WARN L233 SmtUtils]: Spent 5.40s on a formula simplification that was a NOOP. DAG size: 131 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:02:55,917 WARN L233 SmtUtils]: Spent 6.89s on a formula simplification that was a NOOP. DAG size: 130 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:03:07,721 WARN L233 SmtUtils]: Spent 5.39s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:03:22,143 WARN L233 SmtUtils]: Spent 5.45s on a formula simplification that was a NOOP. DAG size: 133 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:03:39,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:04:02,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:04:02,905 INFO L93 Difference]: Finished difference Result 155 states and 196 transitions. [2022-12-14 06:04:02,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-12-14 06:04:02,905 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 states have internal predecessors, (51), 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 [2022-12-14 06:04:02,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:04:02,906 INFO L225 Difference]: With dead ends: 155 [2022-12-14 06:04:02,906 INFO L226 Difference]: Without dead ends: 153 [2022-12-14 06:04:02,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3640 ImplicationChecksByTransitivity, 105.3s TimeCoverageRelationStatistics Valid=2401, Invalid=10030, Unknown=1, NotChecked=0, Total=12432 [2022-12-14 06:04:02,908 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 655 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 207 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:04:02,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 84 Invalid, 1799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1591 Invalid, 1 Unknown, 0 Unchecked, 14.4s Time] [2022-12-14 06:04:02,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-12-14 06:04:02,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 52. [2022-12-14 06:04:02,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.5686274509803921) internal successors, (80), 51 states have internal predecessors, (80), 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) [2022-12-14 06:04:02,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 80 transitions. [2022-12-14 06:04:02,954 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 80 transitions. Word has length 18 [2022-12-14 06:04:02,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:04:02,954 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 80 transitions. [2022-12-14 06:04:02,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 states have internal predecessors, (51), 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) [2022-12-14 06:04:02,954 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 80 transitions. [2022-12-14 06:04:02,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 06:04:02,955 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:04:02,955 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1] [2022-12-14 06:04:02,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:04:03,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:04:03,157 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:04:03,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:04:03,158 INFO L85 PathProgramCache]: Analyzing trace with hash 293585018, now seen corresponding path program 4 times [2022-12-14 06:04:03,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:04:03,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949728921] [2022-12-14 06:04:03,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:04:03,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:04:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:04:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:04:04,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:04:04,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949728921] [2022-12-14 06:04:04,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949728921] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:04:04,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625939322] [2022-12-14 06:04:04,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:04:04,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:04:04,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:04:04,109 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:04:04,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:04:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:04:04,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2022-12-14 06:04:04,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:04:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:04:04,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:04:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:04:08,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625939322] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:04:08,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1667677372] [2022-12-14 06:04:08,706 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 06:04:08,706 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:04:08,706 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:04:08,706 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:04:08,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:04:08,775 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:04:09,219 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2571#(and (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< 0 (mod |ULTIMATE.start_main_~k~0#1| 4294967296)) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:04:09,219 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:04:09,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:04:09,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 36 [2022-12-14 06:04:09,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50733021] [2022-12-14 06:04:09,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:04:09,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 06:04:09,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:04:09,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 06:04:09,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1451, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 06:04:09,221 INFO L87 Difference]: Start difference. First operand 52 states and 80 transitions. Second operand has 36 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 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) [2022-12-14 06:04:31,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:04:31,583 INFO L93 Difference]: Finished difference Result 170 states and 204 transitions. [2022-12-14 06:04:31,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-12-14 06:04:31,583 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 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 19 [2022-12-14 06:04:31,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:04:31,584 INFO L225 Difference]: With dead ends: 170 [2022-12-14 06:04:31,584 INFO L226 Difference]: Without dead ends: 168 [2022-12-14 06:04:31,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3777 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=2221, Invalid=10889, Unknown=0, NotChecked=0, Total=13110 [2022-12-14 06:04:31,586 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 236 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:04:31,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 95 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 06:04:31,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-12-14 06:04:31,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 67. [2022-12-14 06:04:31,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 66 states have internal predecessors, (95), 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) [2022-12-14 06:04:31,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 95 transitions. [2022-12-14 06:04:31,682 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 95 transitions. Word has length 19 [2022-12-14 06:04:31,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:04:31,683 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 95 transitions. [2022-12-14 06:04:31,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 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) [2022-12-14 06:04:31,683 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 95 transitions. [2022-12-14 06:04:31,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 06:04:31,683 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:04:31,683 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 06:04:31,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 06:04:31,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:04:31,885 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:04:31,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:04:31,886 INFO L85 PathProgramCache]: Analyzing trace with hash -71745116, now seen corresponding path program 5 times [2022-12-14 06:04:31,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:04:31,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125528243] [2022-12-14 06:04:31,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:04:31,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:04:31,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:04:32,607 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:04:32,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:04:32,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125528243] [2022-12-14 06:04:32,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125528243] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:04:32,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845367640] [2022-12-14 06:04:32,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:04:32,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:04:32,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:04:32,609 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:04:32,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 06:04:32,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 06:04:32,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:04:32,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-14 06:04:32,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:04:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:04:33,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:04:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:04:35,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845367640] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:04:35,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [669875571] [2022-12-14 06:04:35,538 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 06:04:35,539 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:04:35,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:04:35,539 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:04:35,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:04:35,611 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:04:36,242 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3302#(and (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< 0 (mod |ULTIMATE.start_main_~k~0#1| 4294967296)) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:04:36,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:04:36,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:04:36,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 48 [2022-12-14 06:04:36,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512908151] [2022-12-14 06:04:36,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:04:36,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 06:04:36,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:04:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 06:04:36,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=2500, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 06:04:36,244 INFO L87 Difference]: Start difference. First operand 67 states and 95 transitions. Second operand has 48 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:04:45,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:05:30,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:05:44,084 WARN L233 SmtUtils]: Spent 6.32s on a formula simplification that was a NOOP. DAG size: 124 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:06:15,360 WARN L233 SmtUtils]: Spent 10.59s on a formula simplification that was a NOOP. DAG size: 126 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:06:49,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:06:49,591 INFO L93 Difference]: Finished difference Result 262 states and 298 transitions. [2022-12-14 06:06:49,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-12-14 06:06:49,591 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 06:06:49,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:06:49,592 INFO L225 Difference]: With dead ends: 262 [2022-12-14 06:06:49,592 INFO L226 Difference]: Without dead ends: 260 [2022-12-14 06:06:49,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5291 ImplicationChecksByTransitivity, 111.6s TimeCoverageRelationStatistics Valid=3558, Invalid=17034, Unknown=0, NotChecked=0, Total=20592 [2022-12-14 06:06:49,594 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 689 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 219 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:06:49,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 87 Invalid, 1859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1638 Invalid, 2 Unknown, 0 Unchecked, 24.6s Time] [2022-12-14 06:06:49,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-12-14 06:06:49,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 72. [2022-12-14 06:06:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.4225352112676057) internal successors, (101), 71 states have internal predecessors, (101), 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) [2022-12-14 06:06:49,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2022-12-14 06:06:49,698 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 22 [2022-12-14 06:06:49,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:06:49,698 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2022-12-14 06:06:49,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:06:49,698 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2022-12-14 06:06:49,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 06:06:49,698 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:06:49,699 INFO L195 NwaCegarLoop]: trace histogram [17, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:06:49,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 06:06:49,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:06:49,900 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:06:49,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:06:49,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1213334310, now seen corresponding path program 6 times [2022-12-14 06:06:49,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:06:49,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841578633] [2022-12-14 06:06:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:49,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:06:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:06:50,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:06:50,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841578633] [2022-12-14 06:06:50,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841578633] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:06:50,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241195338] [2022-12-14 06:06:50,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:06:51,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:06:51,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:06:51,000 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:06:51,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 06:06:51,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:06:51,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:06:51,227 WARN L261 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-14 06:06:51,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:06:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:06:52,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:06:55,286 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:06:55,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241195338] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:06:55,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1100333414] [2022-12-14 06:06:55,287 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 06:06:55,288 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:06:55,288 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:06:55,288 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:06:55,288 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:06:55,356 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:06:55,992 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4267#(and (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< 0 (mod |ULTIMATE.start_main_~k~0#1| 4294967296)) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:06:55,992 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:06:55,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:06:55,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 64 [2022-12-14 06:06:55,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038941933] [2022-12-14 06:06:55,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:06:55,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-14 06:06:55,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:06:55,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-14 06:06:55,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=733, Invalid=4097, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 06:06:55,994 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand has 64 states, 64 states have (on average 1.15625) internal successors, (74), 64 states have internal predecessors, (74), 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) [2022-12-14 06:07:45,855 WARN L233 SmtUtils]: Spent 28.21s on a formula simplification that was a NOOP. DAG size: 173 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:08:33,236 WARN L233 SmtUtils]: Spent 25.80s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:08:34,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:08:39,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:09:42,032 WARN L233 SmtUtils]: Spent 37.45s on a formula simplification that was a NOOP. DAG size: 187 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:09:44,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:09:47,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:09:51,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:09:59,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:10:01,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:10:03,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:10:07,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:11:41,130 WARN L233 SmtUtils]: Spent 53.64s on a formula simplification that was a NOOP. DAG size: 192 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:11:48,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:11:51,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:11:54,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:11:58,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:12:00,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:12:02,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:12:04,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:12:09,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:12:13,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:12:15,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:13:30,538 WARN L233 SmtUtils]: Spent 40.52s on a formula simplification that was a NOOP. DAG size: 191 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:13:35,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:13:37,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:13:39,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:13:41,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:13:43,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:13:46,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:13:49,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:13:51,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:13:52,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:13:53,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:13:55,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:13:57,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:13:57,966 INFO L93 Difference]: Finished difference Result 177 states and 209 transitions. [2022-12-14 06:13:57,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-14 06:13:57,968 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.15625) internal successors, (74), 64 states have internal predecessors, (74), 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 26 [2022-12-14 06:13:57,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:13:57,969 INFO L225 Difference]: With dead ends: 177 [2022-12-14 06:13:57,969 INFO L226 Difference]: Without dead ends: 175 [2022-12-14 06:13:57,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1944 ImplicationChecksByTransitivity, 329.2s TimeCoverageRelationStatistics Valid=2187, Invalid=12079, Unknown=14, NotChecked=0, Total=14280 [2022-12-14 06:13:57,970 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 582 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 3701 mSolverCounterSat, 352 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 4067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 3701 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:13:57,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 71 Invalid, 4067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 3701 Invalid, 14 Unknown, 0 Unchecked, 97.4s Time] [2022-12-14 06:13:57,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-12-14 06:13:58,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 57. [2022-12-14 06:13:58,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 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) [2022-12-14 06:13:58,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2022-12-14 06:13:58,081 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 26 [2022-12-14 06:13:58,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:13:58,081 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2022-12-14 06:13:58,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.15625) internal successors, (74), 64 states have internal predecessors, (74), 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) [2022-12-14 06:13:58,081 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2022-12-14 06:13:58,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 06:13:58,082 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:13:58,082 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1] [2022-12-14 06:13:58,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 06:13:58,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 06:13:58,284 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:13:58,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:13:58,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1627572732, now seen corresponding path program 7 times [2022-12-14 06:13:58,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:13:58,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619265916] [2022-12-14 06:13:58,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:13:58,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:13:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:13:59,357 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:13:59,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:13:59,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619265916] [2022-12-14 06:13:59,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619265916] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:13:59,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848390657] [2022-12-14 06:13:59,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 06:13:59,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:13:59,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:13:59,359 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:13:59,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 06:13:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:13:59,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 06:13:59,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:14:00,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:14:04,981 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:14:04,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848390657] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:14:04,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1163296862] [2022-12-14 06:14:04,983 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 06:14:04,983 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:14:04,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:14:04,983 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:14:04,984 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:14:05,054 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:14:05,803 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4985#(and (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< 0 (mod |ULTIMATE.start_main_~k~0#1| 4294967296)) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:14:05,803 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:14:05,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:14:05,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 44 [2022-12-14 06:14:05,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896251903] [2022-12-14 06:14:05,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:14:05,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 06:14:05,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:14:05,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 06:14:05,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2245, Unknown=2, NotChecked=0, Total=2450 [2022-12-14 06:14:05,805 INFO L87 Difference]: Start difference. First operand 57 states and 75 transitions. Second operand has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 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) [2022-12-14 06:14:17,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:14:28,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:14:30,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:14:36,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-12-14 06:15:32,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:15:32,922 INFO L93 Difference]: Finished difference Result 162 states and 180 transitions. [2022-12-14 06:15:32,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-14 06:15:32,923 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 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 29 [2022-12-14 06:15:32,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:15:32,923 INFO L225 Difference]: With dead ends: 162 [2022-12-14 06:15:32,923 INFO L226 Difference]: Without dead ends: 56 [2022-12-14 06:15:32,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1916 ImplicationChecksByTransitivity, 78.2s TimeCoverageRelationStatistics Valid=1456, Invalid=10098, Unknown=2, NotChecked=0, Total=11556 [2022-12-14 06:15:32,924 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 188 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 1379 mSolverCounterSat, 43 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1379 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:15:32,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 164 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1379 Invalid, 2 Unknown, 0 Unchecked, 15.1s Time] [2022-12-14 06:15:32,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-14 06:15:33,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2022-12-14 06:15:33,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 06:15:33,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2022-12-14 06:15:33,018 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 29 [2022-12-14 06:15:33,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:15:33,018 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2022-12-14 06:15:33,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8863636363636365) internal successors, (83), 44 states have internal predecessors, (83), 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) [2022-12-14 06:15:33,018 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2022-12-14 06:15:33,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 06:15:33,019 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:15:33,019 INFO L195 NwaCegarLoop]: trace histogram [15, 4, 3, 3, 1, 1, 1, 1, 1] [2022-12-14 06:15:33,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 06:15:33,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:33,220 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:15:33,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:15:33,221 INFO L85 PathProgramCache]: Analyzing trace with hash -970897254, now seen corresponding path program 8 times [2022-12-14 06:15:33,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:15:33,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37753108] [2022-12-14 06:15:33,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:15:33,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:15:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:15:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:15:34,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:15:34,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37753108] [2022-12-14 06:15:34,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37753108] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:15:34,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873328639] [2022-12-14 06:15:34,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:15:34,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:34,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:15:34,232 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:15:34,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6772c9b5-dc5c-41fd-8a31-14d5357bbde6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 06:15:35,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-12-14 06:15:35,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:15:35,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 80 conjunts are in the unsatisfiable core [2022-12-14 06:15:35,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:15:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:15:36,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:15:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:15:38,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873328639] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:15:38,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1323503594] [2022-12-14 06:15:38,833 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 06:15:38,833 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:15:38,834 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:15:38,834 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:15:38,834 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:15:38,918 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 06:15:39,609 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5708#(and (< (mod |ULTIMATE.start_main_~j~0#1| 4294967296) (mod (div (mod |ULTIMATE.start_main_~n~0#1| 4294967296) 3) 4294967296)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= ~SIZE~0 20000001) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (< 0 (mod |ULTIMATE.start_main_~k~0#1| 4294967296)) 1 0)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 06:15:39,609 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 06:15:39,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:15:39,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 64 [2022-12-14 06:15:39,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428693605] [2022-12-14 06:15:39,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:15:39,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-14 06:15:39,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:15:39,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-14 06:15:39,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=722, Invalid=4108, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 06:15:39,611 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 64 states, 64 states have (on average 1.34375) internal successors, (86), 64 states have internal predecessors, (86), 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) [2022-12-14 06:15:48,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []