./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 30672bd579b7f25ffa685cb80d8a419cb542781c19afe0226ba5d9d3cf26984c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:27:17,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:27:17,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:27:17,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:27:17,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:27:17,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:27:17,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:27:17,322 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:27:17,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:27:17,325 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:27:17,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:27:17,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:27:17,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:27:17,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:27:17,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:27:17,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:27:17,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:27:17,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:27:17,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:27:17,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:27:17,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:27:17,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:27:17,344 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:27:17,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:27:17,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:27:17,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:27:17,350 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:27:17,352 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:27:17,352 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:27:17,353 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:27:17,354 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:27:17,355 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:27:17,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:27:17,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:27:17,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:27:17,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:27:17,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:27:17,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:27:17,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:27:17,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:27:17,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:27:17,364 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:27:17,388 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:27:17,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:27:17,389 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:27:17,389 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:27:17,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:27:17,390 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:27:17,391 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:27:17,391 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:27:17,391 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:27:17,392 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:27:17,392 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:27:17,392 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:27:17,393 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:27:17,393 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:27:17,394 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:27:17,394 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:27:17,394 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:27:17,395 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:27:17,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:27:17,396 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:27:17,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:27:17,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:27:17,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:27:17,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:27:17,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:27:17,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:27:17,399 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:27:17,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:27:17,400 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:27:17,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:27:17,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:27:17,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:27:17,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:27:17,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:27:17,402 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:27:17,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:27:17,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:27:17,403 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:27:17,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:27:17,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:27:17,416 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:27:17,416 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_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30672bd579b7f25ffa685cb80d8a419cb542781c19afe0226ba5d9d3cf26984c [2022-11-03 02:27:17,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:27:17,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:27:17,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:27:17,828 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:27:17,829 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:27:17,831 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2022-11-03 02:27:17,909 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/data/3e755a665/2b34aa358b9b46f99c43ab64a0d7a09f/FLAG37a7b2e0c [2022-11-03 02:27:18,370 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:27:18,371 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2022-11-03 02:27:18,378 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/data/3e755a665/2b34aa358b9b46f99c43ab64a0d7a09f/FLAG37a7b2e0c [2022-11-03 02:27:18,769 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/data/3e755a665/2b34aa358b9b46f99c43ab64a0d7a09f [2022-11-03 02:27:18,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:27:18,773 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:27:18,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:27:18,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:27:18,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:27:18,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:27:18" (1/1) ... [2022-11-03 02:27:18,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14c68407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:18, skipping insertion in model container [2022-11-03 02:27:18,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:27:18" (1/1) ... [2022-11-03 02:27:18,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:27:18,812 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:27:19,018 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2022-11-03 02:27:19,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:27:19,053 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:27:19,074 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2022-11-03 02:27:19,097 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:27:19,121 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:27:19,122 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:19 WrapperNode [2022-11-03 02:27:19,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:27:19,124 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:27:19,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:27:19,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:27:19,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:19" (1/1) ... [2022-11-03 02:27:19,154 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:19" (1/1) ... [2022-11-03 02:27:19,172 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2022-11-03 02:27:19,173 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:27:19,173 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:27:19,174 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:27:19,174 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:27:19,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:19" (1/1) ... [2022-11-03 02:27:19,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:19" (1/1) ... [2022-11-03 02:27:19,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:19" (1/1) ... [2022-11-03 02:27:19,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:19" (1/1) ... [2022-11-03 02:27:19,189 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:19" (1/1) ... [2022-11-03 02:27:19,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:19" (1/1) ... [2022-11-03 02:27:19,194 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:19" (1/1) ... [2022-11-03 02:27:19,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:19" (1/1) ... [2022-11-03 02:27:19,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:27:19,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:27:19,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:27:19,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:27:19,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:19" (1/1) ... [2022-11-03 02:27:19,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:27:19,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:19,236 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:27:19,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:27:19,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:27:19,282 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:27:19,282 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:27:19,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:27:19,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:27:19,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:27:19,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-03 02:27:19,283 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-03 02:27:19,364 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:27:19,366 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:27:19,535 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:27:19,565 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:27:19,565 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 02:27:19,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:27:19 BoogieIcfgContainer [2022-11-03 02:27:19,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:27:19,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:27:19,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:27:19,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:27:19,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:27:18" (1/3) ... [2022-11-03 02:27:19,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ad51048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:27:19, skipping insertion in model container [2022-11-03 02:27:19,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:19" (2/3) ... [2022-11-03 02:27:19,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ad51048 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:27:19, skipping insertion in model container [2022-11-03 02:27:19,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:27:19" (3/3) ... [2022-11-03 02:27:19,579 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound100.c [2022-11-03 02:27:19,602 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:27:19,603 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:27:19,661 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:27:19,669 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;@5bd85456, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:27:19,670 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:27:19,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-03 02:27:19,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:27:19,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:19,685 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:19,686 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:19,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:19,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2133247598, now seen corresponding path program 1 times [2022-11-03 02:27:19,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:19,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346212201] [2022-11-03 02:27:19,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:19,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:19,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:27:19,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888481816] [2022-11-03 02:27:19,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:19,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:19,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:19,841 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:27:19,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:27:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:20,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 02:27:20,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:27:20,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:27:20,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:20,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346212201] [2022-11-03 02:27:20,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:27:20,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888481816] [2022-11-03 02:27:20,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888481816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:20,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:20,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:27:20,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620755606] [2022-11-03 02:27:20,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:20,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:27:20,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:20,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:27:20,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:27:20,116 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:27:20,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:20,152 INFO L93 Difference]: Finished difference Result 50 states and 81 transitions. [2022-11-03 02:27:20,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:27:20,155 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 19 [2022-11-03 02:27:20,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:20,164 INFO L225 Difference]: With dead ends: 50 [2022-11-03 02:27:20,165 INFO L226 Difference]: Without dead ends: 27 [2022-11-03 02:27:20,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:27:20,172 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:20,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:27:20,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-03 02:27:20,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-03 02:27:20,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 16 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 02:27:20,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2022-11-03 02:27:20,218 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 19 [2022-11-03 02:27:20,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:20,220 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2022-11-03 02:27:20,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:27:20,221 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2022-11-03 02:27:20,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-03 02:27:20,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:20,223 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:20,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:27:20,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:20,442 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:20,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:20,443 INFO L85 PathProgramCache]: Analyzing trace with hash 635683218, now seen corresponding path program 1 times [2022-11-03 02:27:20,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:20,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607138451] [2022-11-03 02:27:20,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:20,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:20,467 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:27:20,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698475278] [2022-11-03 02:27:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:20,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:20,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:20,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:27:20,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:27:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:20,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:27:20,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:27:20,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:27:20,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:20,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607138451] [2022-11-03 02:27:20,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:27:20,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698475278] [2022-11-03 02:27:20,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698475278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:20,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:20,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:27:20,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441218809] [2022-11-03 02:27:20,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:20,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:27:20,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:20,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:27:20,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:20,715 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:27:20,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:20,758 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2022-11-03 02:27:20,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:27:20,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 20 [2022-11-03 02:27:20,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:20,762 INFO L225 Difference]: With dead ends: 37 [2022-11-03 02:27:20,762 INFO L226 Difference]: Without dead ends: 29 [2022-11-03 02:27:20,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:20,764 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:20,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:27:20,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-03 02:27:20,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-03 02:27:20,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 02:27:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2022-11-03 02:27:20,775 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 20 [2022-11-03 02:27:20,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:20,776 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2022-11-03 02:27:20,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:27:20,777 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2022-11-03 02:27:20,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 02:27:20,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:20,778 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:20,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:27:21,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:21,004 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:21,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:21,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1775243410, now seen corresponding path program 1 times [2022-11-03 02:27:21,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:21,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510909237] [2022-11-03 02:27:21,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:21,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:21,026 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:27:21,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377483705] [2022-11-03 02:27:21,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:21,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:21,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:21,036 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:27:21,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:27:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:21,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:27:21,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:27:21,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:27:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:27:21,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:21,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510909237] [2022-11-03 02:27:21,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:27:21,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377483705] [2022-11-03 02:27:21,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377483705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:27:21,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [864898075] [2022-11-03 02:27:21,310 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 02:27:21,310 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:27:21,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:27:21,320 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:27:21,321 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:27:22,339 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-03 02:27:22,368 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:27:24,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [864898075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:24,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:27:24,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5, 5] total 15 [2022-11-03 02:27:24,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146185428] [2022-11-03 02:27:24,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:24,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:27:24,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:24,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:27:24,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:27:24,709 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 02:27:24,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:24,971 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-11-03 02:27:24,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:27:24,972 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2022-11-03 02:27:24,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:24,975 INFO L225 Difference]: With dead ends: 38 [2022-11-03 02:27:24,975 INFO L226 Difference]: Without dead ends: 30 [2022-11-03 02:27:24,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:27:24,982 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:24,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:27:24,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-03 02:27:25,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-03 02:27:25,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 02:27:25,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2022-11-03 02:27:25,004 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 21 [2022-11-03 02:27:25,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:25,004 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2022-11-03 02:27:25,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 02:27:25,005 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2022-11-03 02:27:25,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 02:27:25,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:25,006 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:25,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:27:25,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:25,234 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:25,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:25,235 INFO L85 PathProgramCache]: Analyzing trace with hash -963684835, now seen corresponding path program 1 times [2022-11-03 02:27:25,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:25,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903075276] [2022-11-03 02:27:25,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:25,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:25,248 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:27:25,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197590726] [2022-11-03 02:27:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:25,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:25,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:25,250 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:27:25,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:27:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:25,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:27:25,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:27:25,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:27:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:27:25,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:25,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903075276] [2022-11-03 02:27:25,501 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:27:25,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197590726] [2022-11-03 02:27:25,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197590726] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:27:25,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:27:25,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-11-03 02:27:25,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257244467] [2022-11-03 02:27:25,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:25,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:27:25,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:25,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:27:25,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:27:25,504 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:27:25,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:25,588 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2022-11-03 02:27:25,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:27:25,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 23 [2022-11-03 02:27:25,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:25,589 INFO L225 Difference]: With dead ends: 36 [2022-11-03 02:27:25,589 INFO L226 Difference]: Without dead ends: 34 [2022-11-03 02:27:25,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:27:25,591 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:25,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 96 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:27:25,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-03 02:27:25,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-03 02:27:25,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 02:27:25,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2022-11-03 02:27:25,604 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 23 [2022-11-03 02:27:25,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:25,604 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2022-11-03 02:27:25,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:27:25,605 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2022-11-03 02:27:25,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 02:27:25,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:25,606 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:25,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:27:25,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:25,834 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:25,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:25,835 INFO L85 PathProgramCache]: Analyzing trace with hash -748532437, now seen corresponding path program 1 times [2022-11-03 02:27:25,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:25,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562859015] [2022-11-03 02:27:25,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:25,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:25,854 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:27:25,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927659882] [2022-11-03 02:27:25,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:25,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:25,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:25,856 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:27:25,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:27:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:25,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:27:25,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:27:25,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:27:25,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:25,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562859015] [2022-11-03 02:27:25,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:27:25,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927659882] [2022-11-03 02:27:25,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927659882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:25,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:25,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:27:25,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746590960] [2022-11-03 02:27:25,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:25,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:27:25,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:25,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:27:25,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:27:25,971 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:27:26,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:26,016 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2022-11-03 02:27:26,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:27:26,017 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 26 [2022-11-03 02:27:26,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:26,018 INFO L225 Difference]: With dead ends: 59 [2022-11-03 02:27:26,018 INFO L226 Difference]: Without dead ends: 36 [2022-11-03 02:27:26,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:27:26,019 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:26,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 113 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:27:26,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-03 02:27:26,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-03 02:27:26,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-03 02:27:26,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2022-11-03 02:27:26,031 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 26 [2022-11-03 02:27:26,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:26,031 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2022-11-03 02:27:26,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-03 02:27:26,032 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2022-11-03 02:27:26,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 02:27:26,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:26,033 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:26,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:27:26,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:26,258 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:26,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:26,259 INFO L85 PathProgramCache]: Analyzing trace with hash 47389219, now seen corresponding path program 1 times [2022-11-03 02:27:26,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:26,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038706416] [2022-11-03 02:27:26,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:26,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:26,269 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:27:26,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380134597] [2022-11-03 02:27:26,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:26,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:26,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:26,278 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:27:26,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:27:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:26,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:27:26,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:27:26,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:27:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:27:26,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:26,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038706416] [2022-11-03 02:27:26,584 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:27:26,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380134597] [2022-11-03 02:27:26,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380134597] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:27:26,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:27:26,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-11-03 02:27:26,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133513014] [2022-11-03 02:27:26,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:26,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:27:26,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:26,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:27:26,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:27:26,586 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:27:26,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:26,659 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-11-03 02:27:26,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:27:26,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 28 [2022-11-03 02:27:26,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:26,666 INFO L225 Difference]: With dead ends: 50 [2022-11-03 02:27:26,666 INFO L226 Difference]: Without dead ends: 48 [2022-11-03 02:27:26,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:27:26,667 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:26,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:27:26,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-03 02:27:26,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-11-03 02:27:26,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-03 02:27:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2022-11-03 02:27:26,681 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 28 [2022-11-03 02:27:26,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:26,681 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2022-11-03 02:27:26,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 02:27:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2022-11-03 02:27:26,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 02:27:26,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:26,683 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:26,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:27:26,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:26,899 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:26,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:26,899 INFO L85 PathProgramCache]: Analyzing trace with hash 2024014237, now seen corresponding path program 1 times [2022-11-03 02:27:26,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:26,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867488569] [2022-11-03 02:27:26,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:26,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:26,909 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:27:26,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429352110] [2022-11-03 02:27:26,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:26,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:26,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:26,911 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:27:26,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:27:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:26,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 02:27:26,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:27,184 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:27:27,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:27:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:27:27,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:27,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867488569] [2022-11-03 02:27:27,349 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:27:27,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429352110] [2022-11-03 02:27:27,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429352110] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:27:27,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:27:27,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-11-03 02:27:27,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098267692] [2022-11-03 02:27:27,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:27,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:27:27,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:27,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:27:27,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:27:27,351 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:27:27,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:27,435 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-11-03 02:27:27,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:27:27,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 33 [2022-11-03 02:27:27,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:27,437 INFO L225 Difference]: With dead ends: 54 [2022-11-03 02:27:27,437 INFO L226 Difference]: Without dead ends: 52 [2022-11-03 02:27:27,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:27:27,438 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:27,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 113 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:27:27,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-03 02:27:27,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-11-03 02:27:27,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-03 02:27:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-11-03 02:27:27,452 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 33 [2022-11-03 02:27:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:27,453 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-11-03 02:27:27,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-03 02:27:27,453 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-11-03 02:27:27,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 02:27:27,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:27,454 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:27,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:27:27,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:27:27,670 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:27,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:27,671 INFO L85 PathProgramCache]: Analyzing trace with hash 613928483, now seen corresponding path program 1 times [2022-11-03 02:27:27,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:27,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166988423] [2022-11-03 02:27:27,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:27,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:27,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:27:27,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847776941] [2022-11-03 02:27:27,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:27,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:27,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:27,685 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:27:27,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:27:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:27,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 02:27:27,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 02:27:27,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:27:30,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:30,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166988423] [2022-11-03 02:27:30,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:27:30,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847776941] [2022-11-03 02:27:30,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847776941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:27:30,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [944278590] [2022-11-03 02:27:30,661 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-03 02:27:30,661 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:27:30,662 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:27:30,662 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:27:30,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:27:32,126 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 40 for LOIs [2022-11-03 02:27:32,137 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-03 02:27:32,158 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:27:50,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [944278590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:50,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:27:50,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [7] total 22 [2022-11-03 02:27:50,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303034092] [2022-11-03 02:27:50,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:50,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 02:27:50,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:50,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 02:27:50,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=448, Unknown=1, NotChecked=0, Total=552 [2022-11-03 02:27:50,192 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 02:27:51,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:51,414 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-11-03 02:27:51,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:27:51,415 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 38 [2022-11-03 02:27:51,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:51,417 INFO L225 Difference]: With dead ends: 75 [2022-11-03 02:27:51,417 INFO L226 Difference]: Without dead ends: 73 [2022-11-03 02:27:51,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=103, Invalid=448, Unknown=1, NotChecked=0, Total=552 [2022-11-03 02:27:51,418 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:51,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 108 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 02:27:51,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-03 02:27:51,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-11-03 02:27:51,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 45 states have internal predecessors, (50), 18 states have call successors, (18), 9 states have call predecessors, (18), 9 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-03 02:27:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-11-03 02:27:51,453 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 38 [2022-11-03 02:27:51,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:51,453 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-11-03 02:27:51,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 10 states have internal predecessors, (13), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 02:27:51,454 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-11-03 02:27:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:27:51,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:51,460 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:51,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:27:51,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:51,674 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:51,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:51,675 INFO L85 PathProgramCache]: Analyzing trace with hash 55138950, now seen corresponding path program 1 times [2022-11-03 02:27:51,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:51,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881625609] [2022-11-03 02:27:51,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:51,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:51,685 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:27:51,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054356557] [2022-11-03 02:27:51,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:51,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:51,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:51,687 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:27:51,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:27:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:51,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:27:51,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:27:51,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:27:51,915 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:27:51,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:51,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881625609] [2022-11-03 02:27:51,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:27:51,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054356557] [2022-11-03 02:27:51,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054356557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:27:51,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1881455908] [2022-11-03 02:27:51,921 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-03 02:27:51,921 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:27:51,922 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:27:51,922 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:27:51,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:28:03,979 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2022-11-03 02:28:03,984 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-03 02:28:04,001 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:28:12,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1881455908] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:12,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:28:12,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [5, 6] total 26 [2022-11-03 02:28:12,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811002036] [2022-11-03 02:28:12,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:12,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 02:28:12,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:12,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 02:28:12,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:28:12,972 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 02:28:23,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:23,874 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2022-11-03 02:28:23,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 02:28:23,875 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 47 [2022-11-03 02:28:23,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:23,877 INFO L225 Difference]: With dead ends: 114 [2022-11-03 02:28:23,877 INFO L226 Difference]: Without dead ends: 91 [2022-11-03 02:28:23,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 103 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:28:23,879 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:23,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 128 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-03 02:28:23,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-03 02:28:23,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-11-03 02:28:23,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 58 states have internal predecessors, (66), 22 states have call successors, (22), 11 states have call predecessors, (22), 11 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-03 02:28:23,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2022-11-03 02:28:23,903 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 47 [2022-11-03 02:28:23,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:23,904 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2022-11-03 02:28:23,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-03 02:28:23,904 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2022-11-03 02:28:23,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 02:28:23,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:23,905 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:23,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:24,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:24,114 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:24,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:24,115 INFO L85 PathProgramCache]: Analyzing trace with hash -885230527, now seen corresponding path program 1 times [2022-11-03 02:28:24,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:24,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595847013] [2022-11-03 02:28:24,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:24,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:24,135 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:28:24,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1198070667] [2022-11-03 02:28:24,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:24,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:24,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:24,138 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:24,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:28:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:24,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 02:28:24,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:28:24,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:28:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:28:24,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:24,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595847013] [2022-11-03 02:28:24,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:28:24,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198070667] [2022-11-03 02:28:24,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198070667] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:28:24,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [61806141] [2022-11-03 02:28:24,353 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-03 02:28:24,353 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:28:24,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:28:24,354 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:28:24,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:28:40,234 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-03 02:28:40,238 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-03 02:28:40,253 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:28:50,768 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3001#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:28:50,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:28:50,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:28:50,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-11-03 02:28:50,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108306764] [2022-11-03 02:28:50,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:28:50,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:28:50,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:50,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:28:50,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 02:28:50,771 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:28:51,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:51,045 INFO L93 Difference]: Finished difference Result 239 states and 287 transitions. [2022-11-03 02:28:51,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:28:51,045 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 49 [2022-11-03 02:28:51,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:51,049 INFO L225 Difference]: With dead ends: 239 [2022-11-03 02:28:51,049 INFO L226 Difference]: Without dead ends: 216 [2022-11-03 02:28:51,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:28:51,051 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 85 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:51,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 185 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:28:51,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-03 02:28:51,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 202. [2022-11-03 02:28:51,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 130 states have (on average 1.1615384615384616) internal successors, (151), 133 states have internal predecessors, (151), 46 states have call successors, (46), 25 states have call predecessors, (46), 25 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-11-03 02:28:51,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 240 transitions. [2022-11-03 02:28:51,098 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 240 transitions. Word has length 49 [2022-11-03 02:28:51,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:51,099 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 240 transitions. [2022-11-03 02:28:51,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-03 02:28:51,099 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 240 transitions. [2022-11-03 02:28:51,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 02:28:51,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:51,100 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:51,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:51,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:28:51,322 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:51,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:51,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1699609543, now seen corresponding path program 1 times [2022-11-03 02:28:51,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:51,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668122499] [2022-11-03 02:28:51,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:51,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:51,337 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:28:51,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995724849] [2022-11-03 02:28:51,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:51,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:51,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:51,349 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:51,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:28:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:51,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:28:51,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 28 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-03 02:28:51,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:28:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 28 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-03 02:28:51,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:51,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668122499] [2022-11-03 02:28:51,631 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:28:51,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995724849] [2022-11-03 02:28:51,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995724849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:28:51,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [733376282] [2022-11-03 02:28:51,634 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-03 02:28:51,634 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:28:51,634 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:28:51,634 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:28:51,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:28:57,208 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-03 02:28:57,212 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-03 02:28:57,228 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:29:08,542 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4031#(and (<= 2 ~counter~0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:29:08,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:29:08,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:29:08,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-11-03 02:29:08,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663416261] [2022-11-03 02:29:08,543 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:29:08,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:29:08,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:29:08,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:29:08,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:29:08,545 INFO L87 Difference]: Start difference. First operand 202 states and 240 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:29:08,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:08,839 INFO L93 Difference]: Finished difference Result 231 states and 277 transitions. [2022-11-03 02:29:08,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:29:08,840 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 61 [2022-11-03 02:29:08,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:08,843 INFO L225 Difference]: With dead ends: 231 [2022-11-03 02:29:08,843 INFO L226 Difference]: Without dead ends: 229 [2022-11-03 02:29:08,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-11-03 02:29:08,845 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:08,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 90 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:29:08,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-03 02:29:08,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2022-11-03 02:29:08,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 145 states have (on average 1.1448275862068966) internal successors, (166), 150 states have internal predecessors, (166), 54 states have call successors, (54), 28 states have call predecessors, (54), 28 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2022-11-03 02:29:08,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 271 transitions. [2022-11-03 02:29:08,898 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 271 transitions. Word has length 61 [2022-11-03 02:29:08,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:08,898 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 271 transitions. [2022-11-03 02:29:08,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-11-03 02:29:08,899 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 271 transitions. [2022-11-03 02:29:08,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-03 02:29:08,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:08,900 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:08,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:09,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 02:29:09,114 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:09,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:09,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1184603440, now seen corresponding path program 1 times [2022-11-03 02:29:09,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:29:09,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853818759] [2022-11-03 02:29:09,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:09,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:29:09,124 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:29:09,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499039400] [2022-11-03 02:29:09,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:09,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:09,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:09,126 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:29:09,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:29:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:09,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:29:09,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-03 02:29:09,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:29:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-03 02:29:09,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:29:09,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853818759] [2022-11-03 02:29:09,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:29:09,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499039400] [2022-11-03 02:29:09,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499039400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:29:09,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [165656239] [2022-11-03 02:29:09,407 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-03 02:29:09,407 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:29:09,408 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:29:09,408 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:29:09,408 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:29:21,462 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2022-11-03 02:29:21,465 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-03 02:29:21,481 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:29:26,309 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5145#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:29:26,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:29:26,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:29:26,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2022-11-03 02:29:26,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622342565] [2022-11-03 02:29:26,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:29:26,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:29:26,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:29:26,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:29:26,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:29:26,311 INFO L87 Difference]: Start difference. First operand 228 states and 271 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-03 02:29:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:29:26,696 INFO L93 Difference]: Finished difference Result 372 states and 446 transitions. [2022-11-03 02:29:26,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:29:26,697 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 70 [2022-11-03 02:29:26,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:29:26,699 INFO L225 Difference]: With dead ends: 372 [2022-11-03 02:29:26,700 INFO L226 Difference]: Without dead ends: 352 [2022-11-03 02:29:26,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 02:29:26,701 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 155 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:29:26,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 279 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:29:26,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-11-03 02:29:26,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 336. [2022-11-03 02:29:26,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 209 states have (on average 1.1483253588516746) internal successors, (240), 218 states have internal predecessors, (240), 86 states have call successors, (86), 40 states have call predecessors, (86), 40 states have return successors, (81), 77 states have call predecessors, (81), 81 states have call successors, (81) [2022-11-03 02:29:26,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 407 transitions. [2022-11-03 02:29:26,756 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 407 transitions. Word has length 70 [2022-11-03 02:29:26,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:29:26,757 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 407 transitions. [2022-11-03 02:29:26,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (25), 5 states have call predecessors, (25), 4 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-11-03 02:29:26,757 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 407 transitions. [2022-11-03 02:29:26,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:29:26,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:29:26,759 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:29:26,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:29:26,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 02:29:26,962 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:29:26,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:29:26,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1938585712, now seen corresponding path program 1 times [2022-11-03 02:29:26,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:29:26,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544179133] [2022-11-03 02:29:26,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:26,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:29:26,977 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:29:26,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925714855] [2022-11-03 02:29:26,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:29:26,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:29:26,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:29:26,978 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:29:26,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:29:27,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:29:27,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-03 02:29:27,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:29:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-03 02:29:27,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:29:27,964 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 30 proven. 17 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-11-03 02:29:27,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:29:27,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544179133] [2022-11-03 02:29:27,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:29:27,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925714855] [2022-11-03 02:29:27,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925714855] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:29:27,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [602969340] [2022-11-03 02:29:27,967 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-03 02:29:27,967 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:29:27,967 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:29:27,968 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:29:27,968 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:29:40,505 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 19 iterations. Over-approximation may be very coarse. [2022-11-03 02:29:47,515 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2022-11-03 02:29:47,519 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-03 02:29:47,534 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:30:00,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6645#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (<= 1 ~counter~0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:30:00,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:30:00,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:30:00,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-11-03 02:30:00,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708242065] [2022-11-03 02:30:00,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:30:00,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 02:30:00,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:00,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 02:30:00,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1532, Unknown=0, NotChecked=0, Total=1722 [2022-11-03 02:30:00,497 INFO L87 Difference]: Start difference. First operand 336 states and 407 transitions. Second operand has 19 states, 17 states have (on average 2.411764705882353) internal successors, (41), 18 states have internal predecessors, (41), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-03 02:30:03,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:03,568 INFO L93 Difference]: Finished difference Result 457 states and 581 transitions. [2022-11-03 02:30:03,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-03 02:30:03,568 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.411764705882353) internal successors, (41), 18 states have internal predecessors, (41), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) Word has length 71 [2022-11-03 02:30:03,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:03,571 INFO L225 Difference]: With dead ends: 457 [2022-11-03 02:30:03,571 INFO L226 Difference]: Without dead ends: 453 [2022-11-03 02:30:03,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=387, Invalid=3035, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 02:30:03,573 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 98 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:03,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 274 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-03 02:30:03,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-11-03 02:30:03,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 433. [2022-11-03 02:30:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 272 states have (on average 1.1911764705882353) internal successors, (324), 280 states have internal predecessors, (324), 116 states have call successors, (116), 45 states have call predecessors, (116), 44 states have return successors, (111), 107 states have call predecessors, (111), 111 states have call successors, (111) [2022-11-03 02:30:03,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 551 transitions. [2022-11-03 02:30:03,680 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 551 transitions. Word has length 71 [2022-11-03 02:30:03,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:03,681 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 551 transitions. [2022-11-03 02:30:03,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.411764705882353) internal successors, (41), 18 states have internal predecessors, (41), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-11-03 02:30:03,681 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 551 transitions. [2022-11-03 02:30:03,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-03 02:30:03,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:03,683 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:03,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:03,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 02:30:03,890 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:03,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:03,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1382598768, now seen corresponding path program 1 times [2022-11-03 02:30:03,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:03,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107844572] [2022-11-03 02:30:03,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:03,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:03,899 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:30:03,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272415757] [2022-11-03 02:30:03,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:03,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:03,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:03,901 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:03,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:30:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:03,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 02:30:03,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-03 02:30:04,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 40 proven. 7 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-11-03 02:30:04,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:04,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107844572] [2022-11-03 02:30:04,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:30:04,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272415757] [2022-11-03 02:30:04,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272415757] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:04,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [938976797] [2022-11-03 02:30:04,301 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-03 02:30:04,301 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:30:04,301 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:30:04,302 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:30:04,302 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:30:15,847 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2022-11-03 02:30:15,850 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-03 02:30:15,865 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:30:19,796 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8464#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:30:19,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:30:19,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:30:19,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-11-03 02:30:19,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908728544] [2022-11-03 02:30:19,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:30:19,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:30:19,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:30:19,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:30:19,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 02:30:19,798 INFO L87 Difference]: Start difference. First operand 433 states and 551 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-03 02:30:20,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:30:20,474 INFO L93 Difference]: Finished difference Result 531 states and 673 transitions. [2022-11-03 02:30:20,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:30:20,475 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 76 [2022-11-03 02:30:20,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:30:20,478 INFO L225 Difference]: With dead ends: 531 [2022-11-03 02:30:20,478 INFO L226 Difference]: Without dead ends: 495 [2022-11-03 02:30:20,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 196 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2022-11-03 02:30:20,480 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 57 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:30:20,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 169 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 02:30:20,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-11-03 02:30:20,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 450. [2022-11-03 02:30:20,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 289 states have (on average 1.1626297577854672) internal successors, (336), 295 states have internal predecessors, (336), 110 states have call successors, (110), 50 states have call predecessors, (110), 50 states have return successors, (107), 104 states have call predecessors, (107), 107 states have call successors, (107) [2022-11-03 02:30:20,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 553 transitions. [2022-11-03 02:30:20,613 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 553 transitions. Word has length 76 [2022-11-03 02:30:20,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:30:20,613 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 553 transitions. [2022-11-03 02:30:20,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-03 02:30:20,614 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 553 transitions. [2022-11-03 02:30:20,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 02:30:20,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:30:20,615 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:30:20,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:30:20,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:30:20,822 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:30:20,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:30:20,822 INFO L85 PathProgramCache]: Analyzing trace with hash -698925503, now seen corresponding path program 1 times [2022-11-03 02:30:20,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:30:20,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631009929] [2022-11-03 02:30:20,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:20,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:30:20,831 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:30:20,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060561138] [2022-11-03 02:30:20,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:30:20,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:30:20,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:30:20,833 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:30:20,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:30:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:30:20,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 02:30:20,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:30:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 81 proven. 50 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-03 02:30:22,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:30:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 81 proven. 47 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-11-03 02:30:42,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:30:42,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631009929] [2022-11-03 02:30:42,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:30:42,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060561138] [2022-11-03 02:30:42,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060561138] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:30:42,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1426339855] [2022-11-03 02:30:42,074 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 02:30:42,074 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:30:42,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:30:42,075 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:30:42,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:30:53,975 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2022-11-03 02:30:53,978 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-03 02:30:53,992 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:08,461 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10472#(and (<= ~counter~0 101) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:31:08,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:31:08,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:31:08,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2022-11-03 02:31:08,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280865314] [2022-11-03 02:31:08,463 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:31:08,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-03 02:31:08,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:31:08,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-03 02:31:08,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1616, Unknown=2, NotChecked=0, Total=1892 [2022-11-03 02:31:08,465 INFO L87 Difference]: Start difference. First operand 450 states and 553 transitions. Second operand has 24 states, 20 states have (on average 2.3) internal successors, (46), 17 states have internal predecessors, (46), 14 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2022-11-03 02:31:11,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:31:14,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:31:16,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:31:18,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:32:04,453 WARN L234 SmtUtils]: Spent 43.64s on a formula simplification. DAG size of input: 78 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:32:15,596 WARN L234 SmtUtils]: Spent 10.52s on a formula simplification. DAG size of input: 70 DAG size of output: 69 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:32:18,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:32:21,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:32:23,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:32:42,206 WARN L234 SmtUtils]: Spent 16.30s on a formula simplification. DAG size of input: 65 DAG size of output: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:32:44,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:32:54,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:32:58,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:33:01,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:33:45,991 WARN L234 SmtUtils]: Spent 43.71s on a formula simplification. DAG size of input: 79 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:33:55,884 WARN L234 SmtUtils]: Spent 8.53s on a formula simplification. DAG size of input: 71 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:33:57,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:34:06,330 WARN L234 SmtUtils]: Spent 6.94s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:34:08,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:34:12,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:34:14,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:34:17,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:34:19,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:34:23,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:35:11,071 WARN L234 SmtUtils]: Spent 46.43s on a formula simplification. DAG size of input: 67 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:35:13,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:35:21,722 WARN L234 SmtUtils]: Spent 6.02s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:36:06,902 WARN L234 SmtUtils]: Spent 43.66s on a formula simplification. DAG size of input: 79 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:36:08,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:36:14,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-03 02:36:14,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:14,920 INFO L93 Difference]: Finished difference Result 547 states and 683 transitions. [2022-11-03 02:36:14,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 02:36:14,921 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 2.3) internal successors, (46), 17 states have internal predecessors, (46), 14 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) Word has length 88 [2022-11-03 02:36:14,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:14,924 INFO L225 Difference]: With dead ends: 547 [2022-11-03 02:36:14,925 INFO L226 Difference]: Without dead ends: 545 [2022-11-03 02:36:14,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 216 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 270.5s TimeCoverageRelationStatistics Valid=621, Invalid=3283, Unknown=2, NotChecked=0, Total=3906 [2022-11-03 02:36:14,927 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 182 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 250 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:14,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 267 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 932 Invalid, 18 Unknown, 0 Unchecked, 58.6s Time] [2022-11-03 02:36:14,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-03 02:36:15,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 513. [2022-11-03 02:36:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 332 states have (on average 1.180722891566265) internal successors, (392), 337 states have internal predecessors, (392), 126 states have call successors, (126), 54 states have call predecessors, (126), 54 states have return successors, (123), 121 states have call predecessors, (123), 123 states have call successors, (123) [2022-11-03 02:36:15,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 641 transitions. [2022-11-03 02:36:15,212 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 641 transitions. Word has length 88 [2022-11-03 02:36:15,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:15,213 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 641 transitions. [2022-11-03 02:36:15,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 2.3) internal successors, (46), 17 states have internal predecessors, (46), 14 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (30), 13 states have call predecessors, (30), 13 states have call successors, (30) [2022-11-03 02:36:15,214 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 641 transitions. [2022-11-03 02:36:15,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 02:36:15,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:15,217 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:15,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:15,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:15,423 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:15,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:15,423 INFO L85 PathProgramCache]: Analyzing trace with hash -649627105, now seen corresponding path program 1 times [2022-11-03 02:36:15,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:15,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318016199] [2022-11-03 02:36:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:15,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:15,432 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:36:15,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [275656482] [2022-11-03 02:36:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:15,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:15,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:15,434 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:15,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 02:36:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:36:15,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:36:15,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:15,544 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-11-03 02:36:15,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:15,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:15,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318016199] [2022-11-03 02:36:15,545 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:36:15,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275656482] [2022-11-03 02:36:15,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275656482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:15,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:15,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:36:15,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947545272] [2022-11-03 02:36:15,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:15,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:36:15,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:15,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:36:15,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:36:15,547 INFO L87 Difference]: Start difference. First operand 513 states and 641 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 02:36:15,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:15,896 INFO L93 Difference]: Finished difference Result 687 states and 882 transitions. [2022-11-03 02:36:15,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:36:15,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 104 [2022-11-03 02:36:15,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:15,899 INFO L225 Difference]: With dead ends: 687 [2022-11-03 02:36:15,900 INFO L226 Difference]: Without dead ends: 508 [2022-11-03 02:36:15,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:36:15,901 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 11 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:15,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 147 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:36:15,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-11-03 02:36:16,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 486. [2022-11-03 02:36:16,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 315 states have (on average 1.180952380952381) internal successors, (372), 323 states have internal predecessors, (372), 122 states have call successors, (122), 48 states have call predecessors, (122), 48 states have return successors, (119), 114 states have call predecessors, (119), 119 states have call successors, (119) [2022-11-03 02:36:16,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 613 transitions. [2022-11-03 02:36:16,100 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 613 transitions. Word has length 104 [2022-11-03 02:36:16,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:16,100 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 613 transitions. [2022-11-03 02:36:16,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 02:36:16,101 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 613 transitions. [2022-11-03 02:36:16,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 02:36:16,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:16,102 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:16,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:16,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 02:36:16,318 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:16,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:16,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1144504099, now seen corresponding path program 2 times [2022-11-03 02:36:16,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:16,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003541020] [2022-11-03 02:36:16,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:16,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:16,327 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:36:16,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142689504] [2022-11-03 02:36:16,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:36:16,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:16,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:16,329 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:16,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 02:36:16,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:36:16,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:36:16,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:36:16,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2022-11-03 02:36:16,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:36:16,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:16,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003541020] [2022-11-03 02:36:16,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:36:16,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142689504] [2022-11-03 02:36:16,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142689504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:36:16,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:36:16,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:36:16,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73405272] [2022-11-03 02:36:16,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:36:16,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:36:16,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:16,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:36:16,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:36:16,408 INFO L87 Difference]: Start difference. First operand 486 states and 613 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-03 02:36:16,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:16,674 INFO L93 Difference]: Finished difference Result 562 states and 713 transitions. [2022-11-03 02:36:16,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:36:16,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 104 [2022-11-03 02:36:16,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:16,677 INFO L225 Difference]: With dead ends: 562 [2022-11-03 02:36:16,677 INFO L226 Difference]: Without dead ends: 448 [2022-11-03 02:36:16,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:36:16,678 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:16,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 140 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:36:16,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-03 02:36:16,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 431. [2022-11-03 02:36:16,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 275 states have (on average 1.1309090909090909) internal successors, (311), 282 states have internal predecessors, (311), 107 states have call successors, (107), 48 states have call predecessors, (107), 48 states have return successors, (103), 100 states have call predecessors, (103), 103 states have call successors, (103) [2022-11-03 02:36:16,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 521 transitions. [2022-11-03 02:36:16,935 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 521 transitions. Word has length 104 [2022-11-03 02:36:16,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:16,935 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 521 transitions. [2022-11-03 02:36:16,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-03 02:36:16,936 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 521 transitions. [2022-11-03 02:36:16,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-03 02:36:16,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:16,937 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:16,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:17,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:36:17,154 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:17,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:17,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1878404201, now seen corresponding path program 2 times [2022-11-03 02:36:17,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:17,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757370583] [2022-11-03 02:36:17,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:17,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:17,163 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:36:17,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867335873] [2022-11-03 02:36:17,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:36:17,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:17,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:17,168 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:17,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 02:36:17,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 02:36:17,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:36:17,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-03 02:36:17,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 77 proven. 62 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-11-03 02:36:18,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:18,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:36:18,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757370583] [2022-11-03 02:36:18,609 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:36:18,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867335873] [2022-11-03 02:36:18,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867335873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:36:18,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1476057967] [2022-11-03 02:36:18,611 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 02:36:18,611 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:36:18,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:36:18,611 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:36:18,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:36:30,144 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2022-11-03 02:36:30,148 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-03 02:36:30,163 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:36:34,615 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16271#(and (<= ~counter~0 101) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:36:34,616 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:36:34,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:36:34,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-11-03 02:36:34,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355788625] [2022-11-03 02:36:34,616 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 02:36:34,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 02:36:34,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:36:34,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 02:36:34,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:36:34,617 INFO L87 Difference]: Start difference. First operand 431 states and 521 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-11-03 02:36:35,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:36:35,755 INFO L93 Difference]: Finished difference Result 452 states and 545 transitions. [2022-11-03 02:36:35,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:36:35,756 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 106 [2022-11-03 02:36:35,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:36:35,758 INFO L225 Difference]: With dead ends: 452 [2022-11-03 02:36:35,758 INFO L226 Difference]: Without dead ends: 450 [2022-11-03 02:36:35,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=216, Invalid=1590, Unknown=0, NotChecked=0, Total=1806 [2022-11-03 02:36:35,760 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 41 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:36:35,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 261 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 02:36:35,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-11-03 02:36:36,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 446. [2022-11-03 02:36:36,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 284 states have (on average 1.130281690140845) internal successors, (321), 291 states have internal predecessors, (321), 111 states have call successors, (111), 50 states have call predecessors, (111), 50 states have return successors, (107), 104 states have call predecessors, (107), 107 states have call successors, (107) [2022-11-03 02:36:36,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 539 transitions. [2022-11-03 02:36:36,025 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 539 transitions. Word has length 106 [2022-11-03 02:36:36,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:36:36,028 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 539 transitions. [2022-11-03 02:36:36,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2022-11-03 02:36:36,029 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 539 transitions. [2022-11-03 02:36:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-03 02:36:36,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:36:36,031 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:36:36,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:36:36,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:36:36,246 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:36:36,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:36:36,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1268150453, now seen corresponding path program 3 times [2022-11-03 02:36:36,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:36:36,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697465625] [2022-11-03 02:36:36,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:36:36,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:36:36,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:36:36,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986865063] [2022-11-03 02:36:36,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:36:36,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:36:36,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:36:36,258 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:36:36,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 02:36:36,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:36:36,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:36:36,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-03 02:36:36,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:36:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 100 proven. 118 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-11-03 02:36:37,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:36:52,984 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_981| Int) (|v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_873| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_1033| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1084| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_990| Int) (|v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_864| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1083| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_990| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1083|)) (.cse1 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1084| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_981|)) (.cse2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1084| |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_1033|))) (let ((.cse4 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_990| |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_873|)) (.cse3 (+ .cse0 .cse1 .cse2))) (or (= (mod (+ (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_990| (- 1) |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_873|) .cse0 .cse1 (* (- 1) |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_1033|) .cse2) |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_981|) 0) (= .cse3 (+ .cse4 |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_1033|)) (not (= (+ .cse4 (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_981| |v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_864|) |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_1033|) .cse3)))))))) is different from true [2022-11-03 02:37:29,205 WARN L234 SmtUtils]: Spent 14.07s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:37:39,247 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_981| Int) (|v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_873| Int) (|v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_1033| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1084| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_990| Int) (|v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_864| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1083| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_990| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1083|)) (.cse1 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1084| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_981|)) (.cse2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1084| |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_1033|))) (let ((.cse4 (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_990| |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_873|)) (.cse3 (+ .cse0 .cse1 .cse2))) (or (= (mod (+ (* |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_990| (- 1) |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_873|) .cse0 .cse1 (* (- 1) |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_1033|) .cse2) |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_981|) 0) (= .cse3 (+ .cse4 |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_1033|)) (not (= (+ .cse4 (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_981| |v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_864|) |v_ULTIMATE.start_main_~b~0#1_BEFORE_CALL_1033|) .cse3))))))) is different from true [2022-11-03 02:37:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 161 proven. 26 refuted. 6 times theorem prover too weak. 250 trivial. 7 not checked. [2022-11-03 02:37:44,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:37:44,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697465625] [2022-11-03 02:37:44,297 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:37:44,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986865063] [2022-11-03 02:37:44,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986865063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:37:44,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1057352003] [2022-11-03 02:37:44,299 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 02:37:44,299 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:37:44,300 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:37:44,300 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:37:44,300 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:37:56,468 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2022-11-03 02:37:56,472 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 60 for LOIs [2022-11-03 02:37:56,489 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:38:08,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18284#(and (<= ~counter~0 101) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:38:08,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:38:08,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:38:08,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2022-11-03 02:38:08,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185913396] [2022-11-03 02:38:08,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:38:08,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-03 02:38:08,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:38:08,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-03 02:38:08,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1731, Unknown=8, NotChecked=174, Total=2162 [2022-11-03 02:38:08,076 INFO L87 Difference]: Start difference. First operand 446 states and 539 transitions. Second operand has 27 states, 23 states have (on average 2.391304347826087) internal successors, (55), 18 states have internal predecessors, (55), 12 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 14 states have call predecessors, (30), 12 states have call successors, (30) [2022-11-03 02:38:56,589 WARN L234 SmtUtils]: Spent 40.14s on a formula simplification. DAG size of input: 40 DAG size of output: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:39:15,108 WARN L234 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:39:43,231 WARN L234 SmtUtils]: Spent 26.06s on a formula simplification. DAG size of input: 42 DAG size of output: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:39:55,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:39:55,900 INFO L93 Difference]: Finished difference Result 477 states and 566 transitions. [2022-11-03 02:39:55,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-03 02:39:55,901 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 2.391304347826087) internal successors, (55), 18 states have internal predecessors, (55), 12 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 14 states have call predecessors, (30), 12 states have call successors, (30) Word has length 110 [2022-11-03 02:39:55,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:39:55,904 INFO L225 Difference]: With dead ends: 477 [2022-11-03 02:39:55,904 INFO L226 Difference]: Without dead ends: 471 [2022-11-03 02:39:55,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 282 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 144.8s TimeCoverageRelationStatistics Valid=391, Invalid=2906, Unknown=17, NotChecked=226, Total=3540 [2022-11-03 02:39:55,906 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 47 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:39:55,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 347 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 729 Invalid, 0 Unknown, 272 Unchecked, 3.4s Time] [2022-11-03 02:39:55,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-11-03 02:39:56,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 463. [2022-11-03 02:39:56,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 297 states have (on average 1.1178451178451179) internal successors, (332), 302 states have internal predecessors, (332), 110 states have call successors, (110), 56 states have call predecessors, (110), 55 states have return successors, (107), 104 states have call predecessors, (107), 107 states have call successors, (107) [2022-11-03 02:39:56,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 549 transitions. [2022-11-03 02:39:56,147 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 549 transitions. Word has length 110 [2022-11-03 02:39:56,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:39:56,148 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 549 transitions. [2022-11-03 02:39:56,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 2.391304347826087) internal successors, (55), 18 states have internal predecessors, (55), 12 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 14 states have call predecessors, (30), 12 states have call successors, (30) [2022-11-03 02:39:56,148 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 549 transitions. [2022-11-03 02:39:56,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 02:39:56,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:39:56,151 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:39:56,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-03 02:39:56,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:56,378 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:39:56,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:39:56,379 INFO L85 PathProgramCache]: Analyzing trace with hash -600095698, now seen corresponding path program 2 times [2022-11-03 02:39:56,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:39:56,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561784388] [2022-11-03 02:39:56,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:39:56,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:39:56,390 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-03 02:39:56,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529953867] [2022-11-03 02:39:56,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:39:56,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:39:56,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:39:56,392 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:39:56,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59665c7f-19f9-4f75-9554-146e8bf46c6c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 02:39:56,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 02:39:56,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:39:56,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-03 02:39:56,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:39:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 107 proven. 94 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2022-11-03 02:39:57,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:40:38,039 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_1149| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_1140| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_983| Int) (|v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_975| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1254| Int) (|v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_993| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_983| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_1133| Int)) (let ((.cse15 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1254| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_1133| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_1149|)) (.cse14 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_1133| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_1140|))) (let ((.cse12 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1254| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_983|)) (.cse13 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_983|)) (.cse6 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1254| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_1149|)) (.cse7 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_1140|)) (.cse16 (* 2 .cse14)) (.cse17 (* 2 .cse15))) (let ((.cse5 (+ .cse6 (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1254| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_983|)) .cse7 (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_983|)) .cse16 .cse17)) (.cse0 (* .cse13 2)) (.cse1 (* (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_1133| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_1140|) 2)) (.cse2 (* (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1254| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_1133| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_1149|) 2)) (.cse3 (* |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_993| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_1149|)) (.cse4 (* .cse12 2))) (or (not (= (+ .cse0 .cse1 .cse2 .cse3 (* |v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_975| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_1140|) .cse4) .cse5)) (= (mod (let ((.cse10 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_983| 2)) (.cse11 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| (- 2) |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_1133| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_1140|)) (.cse8 (* (- 2) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1254| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_1133| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_1149|)) (.cse9 (* 2 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1254| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_983|))) (+ .cse6 .cse7 (* (- 1) |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_993| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_1149|) (* (- 1) .cse8) (* (- 1) .cse9) (* .cse10 (- 1)) (* (- 1) .cse11) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| (+ .cse10 .cse11 .cse8 .cse9)))) |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_1140|) 0) (<= (+ .cse12 .cse13) (+ .cse14 .cse15)) (= (+ .cse6 .cse7 .cse16 .cse17) (+ .cse0 .cse4)) (= .cse5 (+ .cse0 .cse1 .cse2 .cse3 .cse4))))))))) is different from true [2022-11-03 02:41:34,359 WARN L234 SmtUtils]: Spent 14.14s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:41:53,310 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_1149| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_1140| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_983| Int) (|v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_975| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1254| Int) (|v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_993| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_983| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_1133| Int)) (let ((.cse15 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1254| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_1133| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_1149|)) (.cse14 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_1133| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_1140|))) (let ((.cse12 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1254| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_983|)) (.cse13 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_983|)) (.cse6 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1254| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_1149|)) (.cse7 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_1140|)) (.cse16 (* 2 .cse14)) (.cse17 (* 2 .cse15))) (let ((.cse5 (+ .cse6 (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1254| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_983|)) .cse7 (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_983|)) .cse16 .cse17)) (.cse0 (* .cse13 2)) (.cse1 (* (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_1133| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_1140|) 2)) (.cse2 (* (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1254| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_1133| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_1149|) 2)) (.cse3 (* |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_993| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_1149|)) (.cse4 (* .cse12 2))) (or (not (= (+ .cse0 .cse1 .cse2 .cse3 (* |v_ULTIMATE.start_main_~yy~0#1_BEFORE_CALL_975| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_1140|) .cse4) .cse5)) (= (mod (let ((.cse10 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_983| 2)) (.cse11 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| (- 2) |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_1133| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_1140|)) (.cse8 (* (- 2) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1254| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_1133| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_1149|)) (.cse9 (* 2 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_1254| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_983|))) (+ .cse6 .cse7 (* (- 1) |v_ULTIMATE.start_main_~xy~0#1_BEFORE_CALL_993| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_1149|) (* (- 1) .cse8) (* (- 1) .cse9) (* .cse10 (- 1)) (* (- 1) .cse11) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_1255| (+ .cse10 .cse11 .cse8 .cse9)))) |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_1140|) 0) (<= (+ .cse12 .cse13) (+ .cse14 .cse15)) (= (+ .cse6 .cse7 .cse16 .cse17) (+ .cse0 .cse4)) (= .cse5 (+ .cse0 .cse1 .cse2 .cse3 .cse4)))))))) is different from true [2022-11-03 02:41:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 109 proven. 74 refuted. 34 times theorem prover too weak. 354 trivial. 5 not checked. [2022-11-03 02:41:56,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:41:56,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561784388] [2022-11-03 02:41:56,965 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-03 02:41:56,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529953867] [2022-11-03 02:41:56,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529953867] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:41:56,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [678195645] [2022-11-03 02:41:56,967 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-03 02:41:56,967 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:41:56,967 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:41:56,968 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:41:56,968 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs