./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/divmul_diverge.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/float-benchs/divmul_diverge.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS --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 6ffdc119181aa2456330d740041ecbf5eb23a58830499150b547bc21d0f8f549 --- 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-8393723 [2022-11-19 08:23:31,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:23:31,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:23:31,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:23:31,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:23:31,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:23:31,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:23:31,235 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:23:31,237 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:23:31,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:23:31,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:23:31,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:23:31,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:23:31,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:23:31,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:23:31,252 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:23:31,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:23:31,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:23:31,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:23:31,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:23:31,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:23:31,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:23:31,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:23:31,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:23:31,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:23:31,281 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:23:31,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:23:31,283 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:23:31,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:23:31,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:23:31,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:23:31,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:23:31,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:23:31,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:23:31,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:23:31,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:23:31,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:23:31,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:23:31,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:23:31,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:23:31,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:23:31,292 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:23:31,331 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:23:31,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:23:31,334 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:23:31,334 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:23:31,335 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:23:31,336 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:23:31,336 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:23:31,336 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:23:31,336 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:23:31,336 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:23:31,337 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:23:31,338 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:23:31,338 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:23:31,338 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:23:31,338 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:23:31,338 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:23:31,339 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:23:31,339 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:23:31,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:23:31,340 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:23:31,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:23:31,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:23:31,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:23:31,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:23:31,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:23:31,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:23:31,341 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:23:31,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:23:31,342 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:23:31,342 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:23:31,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:23:31,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:23:31,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:23:31,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:23:31,343 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:23:31,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:23:31,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:23:31,344 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:23:31,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:23:31,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:23:31,345 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:23:31,345 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_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ffdc119181aa2456330d740041ecbf5eb23a58830499150b547bc21d0f8f549 [2022-11-19 08:23:31,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:23:31,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:23:31,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:23:31,716 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:23:31,717 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:23:31,718 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/float-benchs/divmul_diverge.c [2022-11-19 08:23:31,807 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/data/f15960a2c/69a70a97203d44378c9697f9f00503ff/FLAGe02ef3aad [2022-11-19 08:23:32,339 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:23:32,340 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/sv-benchmarks/c/float-benchs/divmul_diverge.c [2022-11-19 08:23:32,346 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/data/f15960a2c/69a70a97203d44378c9697f9f00503ff/FLAGe02ef3aad [2022-11-19 08:23:32,713 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/data/f15960a2c/69a70a97203d44378c9697f9f00503ff [2022-11-19 08:23:32,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:23:32,720 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:23:32,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:23:32,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:23:32,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:23:32,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:23:32" (1/1) ... [2022-11-19 08:23:32,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fd4273a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:32, skipping insertion in model container [2022-11-19 08:23:32,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:23:32" (1/1) ... [2022-11-19 08:23:32,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:23:32,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:23:32,997 WARN L234 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_e6d10270-5283-4d6e-a656-915726e10c47/sv-benchmarks/c/float-benchs/divmul_diverge.c[613,626] [2022-11-19 08:23:33,018 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:23:33,029 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:23:33,044 WARN L234 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_e6d10270-5283-4d6e-a656-915726e10c47/sv-benchmarks/c/float-benchs/divmul_diverge.c[613,626] [2022-11-19 08:23:33,049 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:23:33,065 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:23:33,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:33 WrapperNode [2022-11-19 08:23:33,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:23:33,067 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:23:33,068 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:23:33,068 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:23:33,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:33" (1/1) ... [2022-11-19 08:23:33,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:33" (1/1) ... [2022-11-19 08:23:33,103 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 43 [2022-11-19 08:23:33,104 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:23:33,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:23:33,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:23:33,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:23:33,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:33" (1/1) ... [2022-11-19 08:23:33,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:33" (1/1) ... [2022-11-19 08:23:33,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:33" (1/1) ... [2022-11-19 08:23:33,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:33" (1/1) ... [2022-11-19 08:23:33,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:33" (1/1) ... [2022-11-19 08:23:33,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:33" (1/1) ... [2022-11-19 08:23:33,142 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:33" (1/1) ... [2022-11-19 08:23:33,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:33" (1/1) ... [2022-11-19 08:23:33,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:23:33,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:23:33,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:23:33,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:23:33,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:33" (1/1) ... [2022-11-19 08:23:33,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:23:33,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:23:33,183 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:23:33,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:23:33,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:23:33,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:23:33,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:23:33,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:23:33,303 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:23:33,305 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:23:33,464 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:23:33,502 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:23:33,503 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 08:23:33,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:23:33 BoogieIcfgContainer [2022-11-19 08:23:33,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:23:33,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:23:33,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:23:33,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:23:33,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:23:32" (1/3) ... [2022-11-19 08:23:33,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@423a6d7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:23:33, skipping insertion in model container [2022-11-19 08:23:33,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:33" (2/3) ... [2022-11-19 08:23:33,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@423a6d7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:23:33, skipping insertion in model container [2022-11-19 08:23:33,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:23:33" (3/3) ... [2022-11-19 08:23:33,514 INFO L112 eAbstractionObserver]: Analyzing ICFG divmul_diverge.c [2022-11-19 08:23:33,532 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:23:33,533 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:23:33,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:23:33,589 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@fa506a9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:23:33,589 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:23:33,594 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:33,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 08:23:33,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:33,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 08:23:33,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:23:33,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:33,611 INFO L85 PathProgramCache]: Analyzing trace with hash 2435335, now seen corresponding path program 1 times [2022-11-19 08:23:33,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:33,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290125208] [2022-11-19 08:23:33,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:33,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:33,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:33,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290125208] [2022-11-19 08:23:33,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290125208] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:33,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:33,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:23:33,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678843907] [2022-11-19 08:23:33,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:33,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:23:33,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:33,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:23:33,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:23:33,907 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:33,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:33,937 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2022-11-19 08:23:33,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:23:33,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 08:23:33,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:33,959 INFO L225 Difference]: With dead ends: 13 [2022-11-19 08:23:33,960 INFO L226 Difference]: Without dead ends: 6 [2022-11-19 08:23:33,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:23:33,967 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:33,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:23:34,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2022-11-19 08:23:34,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2022-11-19 08:23:34,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:34,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2022-11-19 08:23:34,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2022-11-19 08:23:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:34,042 INFO L495 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2022-11-19 08:23:34,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:34,043 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2022-11-19 08:23:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 08:23:34,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:34,044 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 08:23:34,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:23:34,044 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:23:34,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:34,045 INFO L85 PathProgramCache]: Analyzing trace with hash 75691404, now seen corresponding path program 1 times [2022-11-19 08:23:34,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:34,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112629466] [2022-11-19 08:23:34,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:34,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:34,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:34,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:34,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112629466] [2022-11-19 08:23:34,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112629466] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:23:34,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595472755] [2022-11-19 08:23:34,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:34,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:34,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:23:34,129 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:23:34,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:23:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:34,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:23:34,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:23:34,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:34,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:23:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:34,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595472755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:23:34,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [610206012] [2022-11-19 08:23:34,320 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-19 08:23:34,320 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:23:34,324 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:23:34,330 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:23:34,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:23:34,752 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:23:34,835 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '69#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 3000000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:23:34,835 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:23:34,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:23:34,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-19 08:23:34,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920563189] [2022-11-19 08:23:34,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:23:34,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:23:34,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:34,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:23:34,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:23:34,839 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:34,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:34,863 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2022-11-19 08:23:34,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:23:34,864 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 08:23:34,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:34,865 INFO L225 Difference]: With dead ends: 12 [2022-11-19 08:23:34,865 INFO L226 Difference]: Without dead ends: 9 [2022-11-19 08:23:34,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:23:34,868 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:34,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:23:34,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-19 08:23:34,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-19 08:23:34,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:34,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-19 08:23:34,876 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2022-11-19 08:23:34,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:34,876 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-19 08:23:34,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:34,877 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-19 08:23:34,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:23:34,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:34,878 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2022-11-19 08:23:34,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 08:23:35,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:35,084 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:23:35,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:35,084 INFO L85 PathProgramCache]: Analyzing trace with hash 259433031, now seen corresponding path program 2 times [2022-11-19 08:23:35,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:35,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452205180] [2022-11-19 08:23:35,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:35,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:35,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:35,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452205180] [2022-11-19 08:23:35,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452205180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:23:35,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940331631] [2022-11-19 08:23:35,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:23:35,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:35,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:23:35,285 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:23:35,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:23:35,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 08:23:35,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:23:35,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:23:35,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:23:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:35,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:23:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:35,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940331631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:23:35,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [213987210] [2022-11-19 08:23:35,455 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-19 08:23:35,459 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:23:35,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:23:35,460 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:23:35,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:23:35,714 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:23:35,804 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '158#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 3000000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:23:35,805 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:23:35,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:23:35,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-19 08:23:35,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610022745] [2022-11-19 08:23:35,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:23:35,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 08:23:35,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:35,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 08:23:35,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:23:35,809 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:35,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:35,849 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2022-11-19 08:23:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:23:35,850 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 08:23:35,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:35,851 INFO L225 Difference]: With dead ends: 18 [2022-11-19 08:23:35,851 INFO L226 Difference]: Without dead ends: 15 [2022-11-19 08:23:35,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:23:35,856 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:35,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:23:35,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-19 08:23:35,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-19 08:23:35,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:35,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-11-19 08:23:35,870 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2022-11-19 08:23:35,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:35,871 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-11-19 08:23:35,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:35,872 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-11-19 08:23:35,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:23:35,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:35,873 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2022-11-19 08:23:35,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:23:36,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:36,079 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:23:36,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:36,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1495765977, now seen corresponding path program 3 times [2022-11-19 08:23:36,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:36,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557528731] [2022-11-19 08:23:36,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:36,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:36,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:36,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557528731] [2022-11-19 08:23:36,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557528731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:23:36,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218442370] [2022-11-19 08:23:36,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:23:36,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:36,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:23:36,472 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:23:36,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:23:36,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:23:36,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:23:36,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:23:36,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:23:36,602 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:36,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:23:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:36,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218442370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:23:36,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1493606271] [2022-11-19 08:23:36,901 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-19 08:23:36,902 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:23:36,902 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:23:36,902 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:23:36,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:23:37,055 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:23:37,173 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '319#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 3000000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:23:37,175 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:23:37,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:23:37,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-19 08:23:37,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627962183] [2022-11-19 08:23:37,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:23:37,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 08:23:37,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:37,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 08:23:37,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2022-11-19 08:23:37,187 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:37,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:37,247 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2022-11-19 08:23:37,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 08:23:37,247 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-19 08:23:37,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:37,249 INFO L225 Difference]: With dead ends: 30 [2022-11-19 08:23:37,249 INFO L226 Difference]: Without dead ends: 27 [2022-11-19 08:23:37,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2022-11-19 08:23:37,257 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:37,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:23:37,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-19 08:23:37,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-19 08:23:37,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:37,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-11-19 08:23:37,272 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2022-11-19 08:23:37,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:37,272 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-11-19 08:23:37,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:37,273 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-11-19 08:23:37,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:23:37,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:37,274 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2022-11-19 08:23:37,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:23:37,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:37,480 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:23:37,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:37,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1609218073, now seen corresponding path program 4 times [2022-11-19 08:23:37,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:37,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430062149] [2022-11-19 08:23:37,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:37,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:38,292 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:38,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:38,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430062149] [2022-11-19 08:23:38,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430062149] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:23:38,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328285016] [2022-11-19 08:23:38,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:23:38,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:38,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:23:38,300 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:23:38,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:23:38,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:38,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:23:38,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:23:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:38,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:23:39,471 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:39,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328285016] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:23:39,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1026483813] [2022-11-19 08:23:39,473 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-19 08:23:39,474 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:23:39,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:23:39,474 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:23:39,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:23:39,600 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:23:39,713 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '624#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 3000000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:23:39,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:23:39,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:23:39,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-19 08:23:39,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385525197] [2022-11-19 08:23:39,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:23:39,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-19 08:23:39,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:39,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-19 08:23:39,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1185, Invalid=1467, Unknown=0, NotChecked=0, Total=2652 [2022-11-19 08:23:39,716 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:39,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:39,809 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2022-11-19 08:23:39,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-19 08:23:39,810 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-19 08:23:39,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:39,811 INFO L225 Difference]: With dead ends: 54 [2022-11-19 08:23:39,811 INFO L226 Difference]: Without dead ends: 51 [2022-11-19 08:23:39,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1185, Invalid=1467, Unknown=0, NotChecked=0, Total=2652 [2022-11-19 08:23:39,813 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:39,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:23:39,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-19 08:23:39,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-19 08:23:39,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:39,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-11-19 08:23:39,821 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2022-11-19 08:23:39,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:39,821 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-11-19 08:23:39,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:39,822 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-11-19 08:23:39,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-19 08:23:39,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:39,823 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2022-11-19 08:23:39,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:23:40,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:40,029 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:23:40,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:40,030 INFO L85 PathProgramCache]: Analyzing trace with hash 326901607, now seen corresponding path program 5 times [2022-11-19 08:23:40,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:40,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342497307] [2022-11-19 08:23:40,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:40,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:42,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:42,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342497307] [2022-11-19 08:23:42,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342497307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:23:42,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922909525] [2022-11-19 08:23:42,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:23:42,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:42,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:23:42,683 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:23:42,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:23:42,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-19 08:23:42,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:23:42,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-19 08:23:42,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:23:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:43,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:23:46,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:46,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922909525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:23:46,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1560185217] [2022-11-19 08:23:46,219 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-19 08:23:46,219 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:23:46,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:23:46,219 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:23:46,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:23:46,328 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:23:46,470 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1217#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 3000000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:23:46,470 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:23:46,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:23:46,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2022-11-19 08:23:46,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661046672] [2022-11-19 08:23:46,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:23:46,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-19 08:23:46,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:46,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-19 08:23:46,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4665, Invalid=5235, Unknown=0, NotChecked=0, Total=9900 [2022-11-19 08:23:46,479 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:46,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:46,726 INFO L93 Difference]: Finished difference Result 102 states and 149 transitions. [2022-11-19 08:23:46,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-19 08:23:46,727 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-19 08:23:46,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:46,728 INFO L225 Difference]: With dead ends: 102 [2022-11-19 08:23:46,729 INFO L226 Difference]: Without dead ends: 99 [2022-11-19 08:23:46,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4665, Invalid=5235, Unknown=0, NotChecked=0, Total=9900 [2022-11-19 08:23:46,732 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:46,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:23:46,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-19 08:23:46,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-19 08:23:46,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:46,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-11-19 08:23:46,744 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2022-11-19 08:23:46,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:46,745 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-11-19 08:23:46,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:46,745 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-11-19 08:23:46,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-19 08:23:46,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:46,748 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1] [2022-11-19 08:23:46,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-19 08:23:46,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 08:23:46,955 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:23:46,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:46,955 INFO L85 PathProgramCache]: Analyzing trace with hash 37637735, now seen corresponding path program 6 times [2022-11-19 08:23:46,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:46,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587222470] [2022-11-19 08:23:46,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:46,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:54,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:54,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587222470] [2022-11-19 08:23:54,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587222470] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:23:54,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25090117] [2022-11-19 08:23:54,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:23:54,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:54,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:23:54,793 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:23:54,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:23:55,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:23:55,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:23:55,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-19 08:23:55,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:23:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:55,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:24:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:24:06,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25090117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:24:06,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [191494020] [2022-11-19 08:24:06,534 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-19 08:24:06,535 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:24:06,535 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:24:06,535 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:24:06,535 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:24:06,637 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:24:06,871 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2386#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 3000000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:24:06,871 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:24:06,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:24:06,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-11-19 08:24:06,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351870912] [2022-11-19 08:24:06,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:24:06,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-11-19 08:24:06,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:24:06,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-11-19 08:24:06,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18537, Invalid=19683, Unknown=0, NotChecked=0, Total=38220 [2022-11-19 08:24:06,890 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 193 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 192 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:24:07,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:24:07,476 INFO L93 Difference]: Finished difference Result 198 states and 293 transitions. [2022-11-19 08:24:07,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-19 08:24:07,477 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 192 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2022-11-19 08:24:07,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:24:07,478 INFO L225 Difference]: With dead ends: 198 [2022-11-19 08:24:07,479 INFO L226 Difference]: Without dead ends: 195 [2022-11-19 08:24:07,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=18537, Invalid=19683, Unknown=0, NotChecked=0, Total=38220 [2022-11-19 08:24:07,483 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:24:07,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:24:07,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-19 08:24:07,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-11-19 08:24:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:24:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2022-11-19 08:24:07,506 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 98 [2022-11-19 08:24:07,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:24:07,507 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2022-11-19 08:24:07,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0155440414507773) internal successors, (196), 192 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:24:07,508 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2022-11-19 08:24:07,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-19 08:24:07,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:24:07,511 INFO L195 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1] [2022-11-19 08:24:07,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:24:07,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:24:07,715 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:24:07,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:24:07,716 INFO L85 PathProgramCache]: Analyzing trace with hash -510350233, now seen corresponding path program 7 times [2022-11-19 08:24:07,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:24:07,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059819616] [2022-11-19 08:24:07,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:24:07,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:24:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:24:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:24:32,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:24:32,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059819616] [2022-11-19 08:24:32,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059819616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:24:32,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810739965] [2022-11-19 08:24:32,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 08:24:32,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:24:32,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:24:32,495 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:24:32,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:24:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:24:33,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-19 08:24:33,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:24:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:24:33,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:25:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:17,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810739965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:25:17,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1513394769] [2022-11-19 08:25:17,336 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-19 08:25:17,336 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:25:17,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:25:17,337 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:25:17,337 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:25:17,436 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:25:17,863 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4707#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 3000000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:25:17,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:25:17,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:25:17,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2022-11-19 08:25:17,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755111447] [2022-11-19 08:25:17,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:25:17,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-11-19 08:25:17,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:17,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-11-19 08:25:17,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73929, Invalid=76227, Unknown=0, NotChecked=0, Total=150156 [2022-11-19 08:25:17,895 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 385 states, 385 states have (on average 1.0077922077922077) internal successors, (388), 384 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:20,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:20,159 INFO L93 Difference]: Finished difference Result 390 states and 581 transitions. [2022-11-19 08:25:20,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-11-19 08:25:20,160 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0077922077922077) internal successors, (388), 384 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2022-11-19 08:25:20,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:20,162 INFO L225 Difference]: With dead ends: 390 [2022-11-19 08:25:20,163 INFO L226 Difference]: Without dead ends: 387 [2022-11-19 08:25:20,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 58.1s TimeCoverageRelationStatistics Valid=73929, Invalid=76227, Unknown=0, NotChecked=0, Total=150156 [2022-11-19 08:25:20,173 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:20,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:25:20,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-11-19 08:25:20,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2022-11-19 08:25:20,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0025906735751295) internal successors, (387), 386 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:20,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2022-11-19 08:25:20,207 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 194 [2022-11-19 08:25:20,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:20,207 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2022-11-19 08:25:20,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0077922077922077) internal successors, (388), 384 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:25:20,208 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2022-11-19 08:25:20,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2022-11-19 08:25:20,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:20,214 INFO L195 NwaCegarLoop]: trace histogram [382, 1, 1, 1, 1] [2022-11-19 08:25:20,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:25:20,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:25:20,428 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:25:20,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:20,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1215731609, now seen corresponding path program 8 times [2022-11-19 08:25:20,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:20,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596555794] [2022-11-19 08:25:20,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:20,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:27:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:27:02,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:27:02,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596555794] [2022-11-19 08:27:02,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596555794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:27:02,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405604215] [2022-11-19 08:27:02,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:27:02,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:27:02,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:27:02,035 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:27:02,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:27:05,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 192 check-sat command(s) [2022-11-19 08:27:05,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:27:05,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 2327 conjuncts, 384 conjunts are in the unsatisfiable core [2022-11-19 08:27:05,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:27:06,361 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:27:06,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:30:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:30:07,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405604215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:30:07,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [100336259] [2022-11-19 08:30:07,478 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-19 08:30:07,478 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:30:07,479 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:30:07,479 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:30:07,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:30:07,574 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:30:08,375 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9332#(and (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 3000000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 08:30:08,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:30:08,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:30:08,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 768 [2022-11-19 08:30:08,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104062948] [2022-11-19 08:30:08,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:30:08,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2022-11-19 08:30:08,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:30:08,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2022-11-19 08:30:08,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295305, Invalid=299907, Unknown=0, NotChecked=0, Total=595212 [2022-11-19 08:30:08,448 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand has 769 states, 769 states have (on average 1.0039011703511054) internal successors, (772), 768 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:27,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:30:27,493 INFO L93 Difference]: Finished difference Result 774 states and 1157 transitions. [2022-11-19 08:30:27,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2022-11-19 08:30:27,495 INFO L78 Accepts]: Start accepts. Automaton has has 769 states, 769 states have (on average 1.0039011703511054) internal successors, (772), 768 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 386 [2022-11-19 08:30:27,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:30:27,499 INFO L225 Difference]: With dead ends: 774 [2022-11-19 08:30:27,499 INFO L226 Difference]: Without dead ends: 771 [2022-11-19 08:30:27,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1540 GetRequests, 770 SyntacticMatches, 0 SemanticMatches, 770 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4975 ImplicationChecksByTransitivity, 241.0s TimeCoverageRelationStatistics Valid=295305, Invalid=299907, Unknown=0, NotChecked=0, Total=595212 [2022-11-19 08:30:27,525 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 386 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 386 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:30:27,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [386 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 08:30:27,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-11-19 08:30:27,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771. [2022-11-19 08:30:27,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 1.0012987012987014) internal successors, (771), 770 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:27,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 771 transitions. [2022-11-19 08:30:27,575 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 771 transitions. Word has length 386 [2022-11-19 08:30:27,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:30:27,576 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 771 transitions. [2022-11-19 08:30:27,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 769 states, 769 states have (on average 1.0039011703511054) internal successors, (772), 768 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:30:27,577 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 771 transitions. [2022-11-19 08:30:27,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2022-11-19 08:30:27,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:30:27,604 INFO L195 NwaCegarLoop]: trace histogram [766, 1, 1, 1, 1] [2022-11-19 08:30:27,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:30:27,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6d10270-5283-4d6e-a656-915726e10c47/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:30:27,823 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:30:27,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:30:27,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1083367527, now seen corresponding path program 9 times [2022-11-19 08:30:27,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:30:27,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107502462] [2022-11-19 08:30:27,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:30:27,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:30:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat