./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9 --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 cfe6fce904e7772b92437e018e53dfef745de1dd85f6147cfc72edd062333cfd --- 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-6b4ec56 [2022-11-20 20:16:22,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:16:22,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:16:22,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:16:22,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:16:22,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:16:22,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:16:22,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:16:22,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:16:22,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:16:22,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:16:22,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:16:22,150 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:16:22,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:16:22,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:16:22,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:16:22,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:16:22,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:16:22,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:16:22,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:16:22,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:16:22,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:16:22,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:16:22,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:16:22,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:16:22,196 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:16:22,196 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:16:22,198 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:16:22,200 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:16:22,201 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:16:22,201 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:16:22,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:16:22,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:16:22,206 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:16:22,208 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:16:22,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:16:22,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:16:22,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:16:22,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:16:22,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:16:22,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:16:22,218 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:16:22,263 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:16:22,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:16:22,275 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:16:22,275 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:16:22,276 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:16:22,277 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:16:22,277 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:16:22,277 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:16:22,278 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:16:22,278 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:16:22,279 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:16:22,280 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:16:22,280 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:16:22,280 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:16:22,280 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:16:22,281 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:16:22,281 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:16:22,281 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:16:22,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:16:22,282 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:16:22,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:16:22,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:16:22,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:16:22,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:16:22,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:16:22,284 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:16:22,284 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:16:22,285 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:16:22,285 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:16:22,285 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:16:22,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:16:22,286 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:16:22,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:16:22,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:16:22,287 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:16:22,287 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:16:22,287 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:16:22,288 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:16:22,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:16:22,288 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:16:22,288 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:16:22,289 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_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cfe6fce904e7772b92437e018e53dfef745de1dd85f6147cfc72edd062333cfd [2022-11-20 20:16:22,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:16:22,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:16:22,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:16:22,678 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:16:22,679 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:16:22,680 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/loops-crafted-1/in-de20.c [2022-11-20 20:16:26,232 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:16:26,493 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:16:26,493 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/sv-benchmarks/c/loops-crafted-1/in-de20.c [2022-11-20 20:16:26,501 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/data/a0ee834c3/49aa787dbf214681849846324fada8c8/FLAG1b842507b [2022-11-20 20:16:26,525 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/data/a0ee834c3/49aa787dbf214681849846324fada8c8 [2022-11-20 20:16:26,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:16:26,532 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:16:26,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:16:26,535 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:16:26,540 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:16:26,541 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:16:26" (1/1) ... [2022-11-20 20:16:26,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17e89478 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:26, skipping insertion in model container [2022-11-20 20:16:26,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:16:26" (1/1) ... [2022-11-20 20:16:26,552 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:16:26,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:16:26,726 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/sv-benchmarks/c/loops-crafted-1/in-de20.c[368,381] [2022-11-20 20:16:26,741 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:16:26,753 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:16:26,764 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/sv-benchmarks/c/loops-crafted-1/in-de20.c[368,381] [2022-11-20 20:16:26,767 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:16:26,782 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:16:26,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:26 WrapperNode [2022-11-20 20:16:26,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:16:26,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:16:26,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:16:26,784 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:16:26,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:26" (1/1) ... [2022-11-20 20:16:26,802 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:26" (1/1) ... [2022-11-20 20:16:26,824 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2022-11-20 20:16:26,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:16:26,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:16:26,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:16:26,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:16:26,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:26" (1/1) ... [2022-11-20 20:16:26,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:26" (1/1) ... [2022-11-20 20:16:26,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:26" (1/1) ... [2022-11-20 20:16:26,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:26" (1/1) ... [2022-11-20 20:16:26,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:26" (1/1) ... [2022-11-20 20:16:26,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:26" (1/1) ... [2022-11-20 20:16:26,860 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:26" (1/1) ... [2022-11-20 20:16:26,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:26" (1/1) ... [2022-11-20 20:16:26,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:16:26,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:16:26,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:16:26,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:16:26,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:26" (1/1) ... [2022-11-20 20:16:26,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:16:26,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:16:26,902 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:16:26,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:16:26,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:16:26,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:16:26,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:16:26,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:16:27,044 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:16:27,047 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:16:27,183 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:16:27,221 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:16:27,222 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 20:16:27,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:16:27 BoogieIcfgContainer [2022-11-20 20:16:27,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:16:27,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:16:27,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:16:27,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:16:27,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:16:26" (1/3) ... [2022-11-20 20:16:27,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f002451 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:16:27, skipping insertion in model container [2022-11-20 20:16:27,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:16:26" (2/3) ... [2022-11-20 20:16:27,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f002451 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:16:27, skipping insertion in model container [2022-11-20 20:16:27,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:16:27" (3/3) ... [2022-11-20 20:16:27,236 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de20.c [2022-11-20 20:16:27,261 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:16:27,261 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 20:16:27,321 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:16:27,328 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;@60895fd3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:16:27,328 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 20:16:27,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) [2022-11-20 20:16:27,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 20:16:27,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:27,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 20:16:27,342 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:16:27,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:27,348 INFO L85 PathProgramCache]: Analyzing trace with hash 70769995, now seen corresponding path program 1 times [2022-11-20 20:16:27,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:16:27,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872397702] [2022-11-20 20:16:27,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:16:27,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:16:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:27,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:16:27,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872397702] [2022-11-20 20:16:27,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872397702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:16:27,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:16:27,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:16:27,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443218305] [2022-11-20 20:16:27,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:16:28,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:16:28,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:16:28,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:16:28,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:16:28,047 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 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) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-20 20:16:28,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:28,113 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2022-11-20 20:16:28,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:16:28,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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 [2022-11-20 20:16:28,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:28,126 INFO L225 Difference]: With dead ends: 17 [2022-11-20 20:16:28,126 INFO L226 Difference]: Without dead ends: 8 [2022-11-20 20:16:28,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:16:28,133 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:28,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 6 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:16:28,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-11-20 20:16:28,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-11-20 20:16:28,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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) [2022-11-20 20:16:28,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2022-11-20 20:16:28,171 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2022-11-20 20:16:28,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:28,171 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2022-11-20 20:16:28,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-20 20:16:28,172 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2022-11-20 20:16:28,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:16:28,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:28,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 20:16:28,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:16:28,174 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:16:28,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:28,175 INFO L85 PathProgramCache]: Analyzing trace with hash -2101767297, now seen corresponding path program 1 times [2022-11-20 20:16:28,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:16:28,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670130563] [2022-11-20 20:16:28,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:16:28,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:16:28,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:28,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:16:28,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670130563] [2022-11-20 20:16:28,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670130563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:16:28,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:16:28,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:16:28,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296908557] [2022-11-20 20:16:28,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:16:28,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:16:28,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:16:28,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:16:28,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:16:28,283 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 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) [2022-11-20 20:16:28,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:28,316 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2022-11-20 20:16:28,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:16:28,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 20:16:28,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:28,318 INFO L225 Difference]: With dead ends: 12 [2022-11-20 20:16:28,318 INFO L226 Difference]: Without dead ends: 7 [2022-11-20 20:16:28,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:16:28,321 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:28,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:16:28,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2022-11-20 20:16:28,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2022-11-20 20:16:28,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) 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) [2022-11-20 20:16:28,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2022-11-20 20:16:28,326 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 6 [2022-11-20 20:16:28,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:28,327 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2022-11-20 20:16:28,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 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) [2022-11-20 20:16:28,327 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2022-11-20 20:16:28,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 20:16:28,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:28,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 20:16:28,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 20:16:28,329 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:16:28,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:28,330 INFO L85 PathProgramCache]: Analyzing trace with hash -2136116320, now seen corresponding path program 1 times [2022-11-20 20:16:28,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:16:28,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670733126] [2022-11-20 20:16:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:16:28,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:16:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:28,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:16:28,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670733126] [2022-11-20 20:16:28,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670733126] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:16:28,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220928347] [2022-11-20 20:16:28,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:16:28,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:28,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:16:28,542 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:16:28,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 20:16:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:28,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 20:16:28,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:28,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:16:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:28,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220928347] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:16:28,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1925677588] [2022-11-20 20:16:28,909 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:16:28,910 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:16:28,915 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:16:28,923 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:16:28,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:16:29,189 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:16:29,353 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '125#(and (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:16:29,353 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:16:29,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:16:29,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-20 20:16:29,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687937002] [2022-11-20 20:16:29,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:16:29,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 20:16:29,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:16:29,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 20:16:29,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-20 20:16:29,357 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 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) [2022-11-20 20:16:29,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:29,499 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-11-20 20:16:29,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 20:16:29,500 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 20:16:29,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:29,501 INFO L225 Difference]: With dead ends: 28 [2022-11-20 20:16:29,501 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 20:16:29,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-20 20:16:29,504 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 36 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:29,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 13 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:16:29,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 20:16:29,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 11. [2022-11-20 20:16:29,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 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) [2022-11-20 20:16:29,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2022-11-20 20:16:29,511 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 6 [2022-11-20 20:16:29,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:29,512 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2022-11-20 20:16:29,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 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) [2022-11-20 20:16:29,513 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2022-11-20 20:16:29,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 20:16:29,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:29,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:16:29,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 20:16:29,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:29,720 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:16:29,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:29,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1795766326, now seen corresponding path program 1 times [2022-11-20 20:16:29,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:16:29,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401986461] [2022-11-20 20:16:29,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:16:29,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:16:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:29,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:16:29,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401986461] [2022-11-20 20:16:29,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401986461] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:16:29,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033853383] [2022-11-20 20:16:29,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:16:29,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:29,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:16:29,942 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:16:29,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 20:16:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:30,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 20:16:30,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:30,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:16:30,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:30,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033853383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:16:30,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [265852276] [2022-11-20 20:16:30,157 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:16:30,157 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:16:30,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:16:30,159 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:16:30,159 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:16:30,336 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:16:30,457 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '239#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:16:30,457 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:16:30,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:16:30,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-20 20:16:30,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737936646] [2022-11-20 20:16:30,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:16:30,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:16:30,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:16:30,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:16:30,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-20 20:16:30,460 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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) [2022-11-20 20:16:30,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:30,533 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2022-11-20 20:16:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:16:30,534 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 20:16:30,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:30,536 INFO L225 Difference]: With dead ends: 16 [2022-11-20 20:16:30,536 INFO L226 Difference]: Without dead ends: 13 [2022-11-20 20:16:30,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-20 20:16:30,538 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:30,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:16:30,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-20 20:16:30,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-11-20 20:16:30,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:30,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2022-11-20 20:16:30,549 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 7 [2022-11-20 20:16:30,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:30,549 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2022-11-20 20:16:30,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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) [2022-11-20 20:16:30,552 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2022-11-20 20:16:30,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 20:16:30,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:30,553 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-20 20:16:30,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:16:30,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:30,764 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:16:30,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:30,765 INFO L85 PathProgramCache]: Analyzing trace with hash 165148896, now seen corresponding path program 2 times [2022-11-20 20:16:30,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:16:30,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771441927] [2022-11-20 20:16:30,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:16:30,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:16:30,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:30,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:16:30,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771441927] [2022-11-20 20:16:30,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771441927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:16:30,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777215062] [2022-11-20 20:16:30,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:16:30,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:30,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:16:30,882 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:16:30,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 20:16:30,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:16:30,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:30,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 20:16:30,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:31,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:16:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:31,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777215062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:16:31,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1714581801] [2022-11-20 20:16:31,117 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:16:31,117 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:16:31,117 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:16:31,118 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:16:31,118 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:16:31,225 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:16:31,342 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '343#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:16:31,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:16:31,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:16:31,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-11-20 20:16:31,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075729248] [2022-11-20 20:16:31,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:16:31,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 20:16:31,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:16:31,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 20:16:31,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-11-20 20:16:31,345 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:31,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:31,693 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-11-20 20:16:31,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 20:16:31,695 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 20:16:31,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:31,696 INFO L225 Difference]: With dead ends: 29 [2022-11-20 20:16:31,696 INFO L226 Difference]: Without dead ends: 23 [2022-11-20 20:16:31,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-11-20 20:16:31,698 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 33 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:31,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 20 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:16:31,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-20 20:16:31,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2022-11-20 20:16:31,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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) [2022-11-20 20:16:31,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2022-11-20 20:16:31,732 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 8 [2022-11-20 20:16:31,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:31,732 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2022-11-20 20:16:31,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:31,733 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2022-11-20 20:16:31,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:16:31,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:31,733 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2022-11-20 20:16:31,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:16:31,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:31,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:16:31,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:31,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2120661397, now seen corresponding path program 3 times [2022-11-20 20:16:31,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:16:31,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935344096] [2022-11-20 20:16:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:16:31,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:16:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:32,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:16:32,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935344096] [2022-11-20 20:16:32,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935344096] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:16:32,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327089195] [2022-11-20 20:16:32,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:16:32,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:32,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:16:32,300 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:16:32,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:16:32,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:16:32,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:32,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 20:16:32,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:32,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:32,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:16:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:32,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327089195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:16:32,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [510663394] [2022-11-20 20:16:32,501 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:16:32,501 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:16:32,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:16:32,503 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:16:32,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:16:32,619 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:16:32,731 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '494#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:16:32,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:16:32,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:16:32,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-11-20 20:16:32,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460350047] [2022-11-20 20:16:32,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:16:32,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 20:16:32,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:16:32,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 20:16:32,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:16:32,734 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:32,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:32,838 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2022-11-20 20:16:32,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:16:32,845 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 20:16:32,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:32,845 INFO L225 Difference]: With dead ends: 19 [2022-11-20 20:16:32,846 INFO L226 Difference]: Without dead ends: 16 [2022-11-20 20:16:32,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-11-20 20:16:32,847 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:32,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 14 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:16:32,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-20 20:16:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-11-20 20:16:32,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:32,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-11-20 20:16:32,855 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 9 [2022-11-20 20:16:32,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:32,855 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-11-20 20:16:32,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-11-20 20:16:32,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 20:16:32,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:32,856 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-20 20:16:32,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 20:16:33,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:33,057 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:16:33,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:33,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1109486186, now seen corresponding path program 4 times [2022-11-20 20:16:33,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:16:33,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024220496] [2022-11-20 20:16:33,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:16:33,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:16:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:33,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:16:33,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024220496] [2022-11-20 20:16:33,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024220496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:16:33,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725188587] [2022-11-20 20:16:33,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:16:33,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:33,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:16:33,204 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:16:33,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 20:16:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:33,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 20:16:33,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:33,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:33,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:16:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:33,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725188587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:16:33,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [275410747] [2022-11-20 20:16:33,476 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:16:33,476 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:16:33,477 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:16:33,477 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:16:33,477 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:16:33,572 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:16:33,689 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '619#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:16:33,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:16:33,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:16:33,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-20 20:16:33,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102504702] [2022-11-20 20:16:33,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:16:33,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 20:16:33,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:16:33,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 20:16:33,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-11-20 20:16:33,692 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 15 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 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) [2022-11-20 20:16:34,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:34,771 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2022-11-20 20:16:34,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 20:16:34,772 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 20:16:34,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:34,773 INFO L225 Difference]: With dead ends: 55 [2022-11-20 20:16:34,773 INFO L226 Difference]: Without dead ends: 52 [2022-11-20 20:16:34,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=341, Invalid=1141, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 20:16:34,774 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 113 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:34,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 35 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:16:34,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-20 20:16:34,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 18. [2022-11-20 20:16:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:34,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2022-11-20 20:16:34,793 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 9 [2022-11-20 20:16:34,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:34,794 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2022-11-20 20:16:34,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 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) [2022-11-20 20:16:34,794 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2022-11-20 20:16:34,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 20:16:34,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:34,795 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2022-11-20 20:16:34,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:16:35,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:35,001 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:16:35,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:35,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1316663713, now seen corresponding path program 5 times [2022-11-20 20:16:35,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:16:35,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808458521] [2022-11-20 20:16:35,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:16:35,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:16:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:35,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:35,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:16:35,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808458521] [2022-11-20 20:16:35,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808458521] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:16:35,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538918703] [2022-11-20 20:16:35,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:16:35,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:35,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:16:35,191 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:16:35,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 20:16:35,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:16:35,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:35,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 20:16:35,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:35,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:35,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:16:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:35,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538918703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:16:35,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1999023221] [2022-11-20 20:16:35,516 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:16:35,516 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:16:35,516 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:16:35,516 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:16:35,517 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:16:35,631 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:16:35,771 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '851#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:16:35,771 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:16:35,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:16:35,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2022-11-20 20:16:35,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277772404] [2022-11-20 20:16:35,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:16:35,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 20:16:35,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:16:35,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 20:16:35,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-11-20 20:16:35,773 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:36,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:36,710 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2022-11-20 20:16:36,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 20:16:36,711 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 20:16:36,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:36,711 INFO L225 Difference]: With dead ends: 47 [2022-11-20 20:16:36,711 INFO L226 Difference]: Without dead ends: 40 [2022-11-20 20:16:36,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=229, Invalid=1253, Unknown=0, NotChecked=0, Total=1482 [2022-11-20 20:16:36,713 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 70 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:36,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 50 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:16:36,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-20 20:16:36,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 21. [2022-11-20 20:16:36,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2022-11-20 20:16:36,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2022-11-20 20:16:36,724 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 10 [2022-11-20 20:16:36,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:36,724 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2022-11-20 20:16:36,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:36,725 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2022-11-20 20:16:36,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 20:16:36,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:36,725 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2022-11-20 20:16:36,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 20:16:36,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:36,931 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:16:36,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:36,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1042900266, now seen corresponding path program 6 times [2022-11-20 20:16:36,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:16:36,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607442237] [2022-11-20 20:16:36,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:16:36,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:16:36,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:37,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:16:37,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607442237] [2022-11-20 20:16:37,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607442237] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:16:37,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182012854] [2022-11-20 20:16:37,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:16:37,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:37,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:16:37,555 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:16:37,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 20:16:37,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:16:37,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:37,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 20:16:37,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:37,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:16:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:37,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182012854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:16:37,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1350538741] [2022-11-20 20:16:37,934 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:16:37,934 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:16:37,935 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:16:37,935 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:16:37,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:16:38,014 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:16:38,138 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1087#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:16:38,138 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:16:38,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:16:38,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 16 [2022-11-20 20:16:38,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590887813] [2022-11-20 20:16:38,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:16:38,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 20:16:38,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:16:38,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 20:16:38,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-11-20 20:16:38,140 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2022-11-20 20:16:38,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:38,306 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2022-11-20 20:16:38,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 20:16:38,307 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 11 [2022-11-20 20:16:38,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:38,307 INFO L225 Difference]: With dead ends: 28 [2022-11-20 20:16:38,308 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 20:16:38,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-11-20 20:16:38,309 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:38,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 23 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:16:38,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 20:16:38,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2022-11-20 20:16:38,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2022-11-20 20:16:38,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2022-11-20 20:16:38,325 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 11 [2022-11-20 20:16:38,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:38,325 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2022-11-20 20:16:38,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2022-11-20 20:16:38,326 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2022-11-20 20:16:38,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:16:38,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:38,327 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2022-11-20 20:16:38,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 20:16:38,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 20:16:38,533 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:16:38,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:38,533 INFO L85 PathProgramCache]: Analyzing trace with hash -2030499968, now seen corresponding path program 7 times [2022-11-20 20:16:38,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:16:38,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103672857] [2022-11-20 20:16:38,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:16:38,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:16:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:38,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:16:38,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103672857] [2022-11-20 20:16:38,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103672857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:16:38,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605905882] [2022-11-20 20:16:38,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:16:38,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:38,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:16:38,728 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:16:38,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 20:16:38,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:38,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:16:38,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:38,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:16:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:39,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605905882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:16:39,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2023418388] [2022-11-20 20:16:39,091 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:16:39,091 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:16:39,092 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:16:39,092 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:16:39,092 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:16:39,184 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:16:39,323 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1265#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:16:39,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:16:39,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:16:39,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 19 [2022-11-20 20:16:39,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380086774] [2022-11-20 20:16:39,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:16:39,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 20:16:39,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:16:39,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 20:16:39,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-11-20 20:16:39,325 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand has 20 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:41,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:41,877 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-11-20 20:16:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 20:16:41,879 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:16:41,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:41,879 INFO L225 Difference]: With dead ends: 57 [2022-11-20 20:16:41,880 INFO L226 Difference]: Without dead ends: 49 [2022-11-20 20:16:41,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=418, Invalid=2444, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 20:16:41,882 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 129 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:41,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 56 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:16:41,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-20 20:16:41,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 26. [2022-11-20 20:16:41,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 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) [2022-11-20 20:16:41,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2022-11-20 20:16:41,901 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 12 [2022-11-20 20:16:41,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:41,901 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-11-20 20:16:41,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:41,902 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2022-11-20 20:16:41,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 20:16:41,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:41,903 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1] [2022-11-20 20:16:41,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 20:16:42,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 20:16:42,109 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:16:42,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:42,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1426098112, now seen corresponding path program 2 times [2022-11-20 20:16:42,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:16:42,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866283559] [2022-11-20 20:16:42,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:16:42,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:16:42,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:42,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:16:42,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866283559] [2022-11-20 20:16:42,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866283559] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:16:42,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307095608] [2022-11-20 20:16:42,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:16:42,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:42,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:16:42,311 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:16:42,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 20:16:42,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 20:16:42,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:42,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 20:16:42,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:42,495 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:42,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:16:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:42,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307095608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:16:42,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [588511956] [2022-11-20 20:16:42,748 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:16:42,748 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:16:42,749 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:16:42,749 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:16:42,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:16:42,796 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:16:43,000 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1560#(and (= |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~z~0#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~x~0#1| 4294967296))) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:16:43,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:16:43,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:16:43,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-11-20 20:16:43,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418410793] [2022-11-20 20:16:43,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:16:43,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 20:16:43,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:16:43,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 20:16:43,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2022-11-20 20:16:43,003 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:46,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:46,886 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2022-11-20 20:16:46,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 20:16:46,887 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 20:16:46,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:46,888 INFO L225 Difference]: With dead ends: 100 [2022-11-20 20:16:46,888 INFO L226 Difference]: Without dead ends: 97 [2022-11-20 20:16:46,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=506, Invalid=1474, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 20:16:46,890 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 360 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:46,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 89 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:16:46,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-20 20:16:46,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 34. [2022-11-20 20:16:46,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:46,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 50 transitions. [2022-11-20 20:16:46,912 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 50 transitions. Word has length 12 [2022-11-20 20:16:46,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:46,913 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 50 transitions. [2022-11-20 20:16:46,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:46,913 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 50 transitions. [2022-11-20 20:16:46,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:16:46,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:46,914 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-20 20:16:46,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 20:16:47,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:47,120 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:16:47,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:47,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2062718859, now seen corresponding path program 8 times [2022-11-20 20:16:47,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:16:47,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436375932] [2022-11-20 20:16:47,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:16:47,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:16:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:47,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:16:47,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436375932] [2022-11-20 20:16:47,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436375932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:16:47,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927366696] [2022-11-20 20:16:47,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:16:47,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:47,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:16:47,776 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:16:47,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 20:16:47,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 20:16:47,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:47,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 20:16:47,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:47,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:16:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:48,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927366696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:16:48,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [129555208] [2022-11-20 20:16:48,282 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:16:48,282 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:16:48,283 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:16:48,283 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:16:48,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:16:48,387 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:16:48,538 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1918#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:16:48,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:16:48,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:16:48,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 20 [2022-11-20 20:16:48,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877973955] [2022-11-20 20:16:48,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:16:48,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 20:16:48,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:16:48,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 20:16:48,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-11-20 20:16:48,540 INFO L87 Difference]: Start difference. First operand 34 states and 50 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:48,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:48,802 INFO L93 Difference]: Finished difference Result 42 states and 58 transitions. [2022-11-20 20:16:48,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 20:16:48,803 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:16:48,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:48,803 INFO L225 Difference]: With dead ends: 42 [2022-11-20 20:16:48,803 INFO L226 Difference]: Without dead ends: 39 [2022-11-20 20:16:48,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-11-20 20:16:48,805 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:48,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:16:48,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-20 20:16:48,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2022-11-20 20:16:48,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 33 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:48,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 50 transitions. [2022-11-20 20:16:48,828 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 50 transitions. Word has length 13 [2022-11-20 20:16:48,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:48,829 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 50 transitions. [2022-11-20 20:16:48,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:48,829 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 50 transitions. [2022-11-20 20:16:48,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 20:16:48,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:48,830 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1] [2022-11-20 20:16:48,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 20:16:49,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:49,036 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:16:49,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:49,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1971448917, now seen corresponding path program 9 times [2022-11-20 20:16:49,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:16:49,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376347160] [2022-11-20 20:16:49,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:16:49,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:16:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:49,322 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:49,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:16:49,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376347160] [2022-11-20 20:16:49,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376347160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:16:49,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138811429] [2022-11-20 20:16:49,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:16:49,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:49,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:16:49,324 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:16:49,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 20:16:49,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:16:49,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:16:49,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 20:16:49,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:49,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:16:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:49,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138811429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:16:49,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1271945639] [2022-11-20 20:16:49,717 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:16:49,717 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:16:49,718 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:16:49,718 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:16:49,718 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:16:49,788 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:16:49,959 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2159#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:16:49,959 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:16:49,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:16:49,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-11-20 20:16:49,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538990605] [2022-11-20 20:16:49,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:16:49,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 20:16:49,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:16:49,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 20:16:49,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-11-20 20:16:49,962 INFO L87 Difference]: Start difference. First operand 34 states and 50 transitions. Second operand has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:59,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:16:59,406 INFO L93 Difference]: Finished difference Result 105 states and 133 transitions. [2022-11-20 20:16:59,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-20 20:16:59,406 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 20:16:59,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:16:59,407 INFO L225 Difference]: With dead ends: 105 [2022-11-20 20:16:59,407 INFO L226 Difference]: Without dead ends: 102 [2022-11-20 20:16:59,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1656 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1432, Invalid=4574, Unknown=0, NotChecked=0, Total=6006 [2022-11-20 20:16:59,410 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 399 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:16:59,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 71 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:16:59,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-20 20:16:59,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 32. [2022-11-20 20:16:59,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:59,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2022-11-20 20:16:59,434 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 13 [2022-11-20 20:16:59,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:16:59,434 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2022-11-20 20:16:59,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:16:59,435 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2022-11-20 20:16:59,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 20:16:59,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:16:59,436 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2022-11-20 20:16:59,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 20:16:59,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 20:16:59,641 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:16:59,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:16:59,642 INFO L85 PathProgramCache]: Analyzing trace with hash -480894657, now seen corresponding path program 10 times [2022-11-20 20:16:59,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:16:59,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994822781] [2022-11-20 20:16:59,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:16:59,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:16:59,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:59,830 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:59,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:16:59,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994822781] [2022-11-20 20:16:59,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994822781] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:16:59,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549097621] [2022-11-20 20:16:59,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:16:59,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:16:59,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:16:59,832 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:16:59,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 20:16:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:16:59,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 20:16:59,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:16:59,964 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:16:59,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:17:00,215 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:17:00,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549097621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:17:00,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1472062568] [2022-11-20 20:17:00,217 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:17:00,217 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:17:00,218 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:17:00,218 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:17:00,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:17:00,301 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:17:00,436 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2601#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:17:00,436 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:17:00,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:17:00,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 23 [2022-11-20 20:17:00,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513234609] [2022-11-20 20:17:00,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:17:00,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 20:17:00,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:17:00,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 20:17:00,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2022-11-20 20:17:00,438 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 23 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) [2022-11-20 20:17:07,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:17:07,352 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2022-11-20 20:17:07,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-20 20:17:07,353 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 23 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 [2022-11-20 20:17:07,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:17:07,353 INFO L225 Difference]: With dead ends: 85 [2022-11-20 20:17:07,353 INFO L226 Difference]: Without dead ends: 76 [2022-11-20 20:17:07,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=706, Invalid=4264, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 20:17:07,356 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 200 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:17:07,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 58 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 20:17:07,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-20 20:17:07,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 38. [2022-11-20 20:17:07,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 37 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:17:07,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 53 transitions. [2022-11-20 20:17:07,414 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 53 transitions. Word has length 14 [2022-11-20 20:17:07,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:17:07,414 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 53 transitions. [2022-11-20 20:17:07,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 23 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) [2022-11-20 20:17:07,415 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 53 transitions. [2022-11-20 20:17:07,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 20:17:07,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:17:07,421 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2022-11-20 20:17:07,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 20:17:07,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 20:17:07,623 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:17:07,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:17:07,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1087645046, now seen corresponding path program 11 times [2022-11-20 20:17:07,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:17:07,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075239048] [2022-11-20 20:17:07,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:17:07,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:17:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:17:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:17:08,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:17:08,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075239048] [2022-11-20 20:17:08,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075239048] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:17:08,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264401828] [2022-11-20 20:17:08,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:17:08,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:17:08,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:17:08,412 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:17:08,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 20:17:08,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 20:17:08,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:17:08,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 20:17:08,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:17:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:17:08,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:17:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:17:09,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264401828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:17:09,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [529892970] [2022-11-20 20:17:09,086 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:17:09,087 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:17:09,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:17:09,087 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:17:09,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:17:09,151 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:17:09,301 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3021#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:17:09,301 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:17:09,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:17:09,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 24 [2022-11-20 20:17:09,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876315117] [2022-11-20 20:17:09,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:17:09,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 20:17:09,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:17:09,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 20:17:09,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-11-20 20:17:09,305 INFO L87 Difference]: Start difference. First operand 38 states and 53 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 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) [2022-11-20 20:17:09,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:17:09,676 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-11-20 20:17:09,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 20:17:09,677 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 20:17:09,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:17:09,678 INFO L225 Difference]: With dead ends: 47 [2022-11-20 20:17:09,678 INFO L226 Difference]: Without dead ends: 44 [2022-11-20 20:17:09,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2022-11-20 20:17:09,679 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:17:09,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:17:09,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-20 20:17:09,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2022-11-20 20:17:09,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 37 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:17:09,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 53 transitions. [2022-11-20 20:17:09,707 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 53 transitions. Word has length 15 [2022-11-20 20:17:09,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:17:09,708 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 53 transitions. [2022-11-20 20:17:09,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 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) [2022-11-20 20:17:09,708 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 53 transitions. [2022-11-20 20:17:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 20:17:09,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:17:09,709 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2022-11-20 20:17:09,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 20:17:09,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:17:09,917 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:17:09,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:17:09,918 INFO L85 PathProgramCache]: Analyzing trace with hash 642072096, now seen corresponding path program 12 times [2022-11-20 20:17:09,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:17:09,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596410690] [2022-11-20 20:17:09,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:17:09,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:17:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:17:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:17:10,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:17:10,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596410690] [2022-11-20 20:17:10,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596410690] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:17:10,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165032781] [2022-11-20 20:17:10,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:17:10,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:17:10,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:17:10,194 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:17:10,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 20:17:10,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:17:10,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:17:10,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 20:17:10,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:17:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:17:10,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:17:10,824 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:17:10,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165032781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:17:10,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1491858742] [2022-11-20 20:17:10,825 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:17:10,826 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:17:10,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:17:10,826 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:17:10,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:17:10,887 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:17:11,056 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3303#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:17:11,056 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:17:11,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:17:11,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 27 [2022-11-20 20:17:11,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550683156] [2022-11-20 20:17:11,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:17:11,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 20:17:11,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:17:11,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 20:17:11,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-11-20 20:17:11,058 INFO L87 Difference]: Start difference. First operand 38 states and 53 transitions. Second operand has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:17:27,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:17:27,717 INFO L93 Difference]: Finished difference Result 102 states and 129 transitions. [2022-11-20 20:17:27,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-20 20:17:27,732 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 20:17:27,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:17:27,733 INFO L225 Difference]: With dead ends: 102 [2022-11-20 20:17:27,733 INFO L226 Difference]: Without dead ends: 92 [2022-11-20 20:17:27,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=1122, Invalid=6888, Unknown=0, NotChecked=0, Total=8010 [2022-11-20 20:17:27,737 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 313 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:17:27,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 70 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 20:17:27,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-20 20:17:27,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 45. [2022-11-20 20:17:27,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 44 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:17:27,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2022-11-20 20:17:27,776 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 16 [2022-11-20 20:17:27,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:17:27,776 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2022-11-20 20:17:27,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:17:27,777 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2022-11-20 20:17:27,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 20:17:27,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:17:27,778 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2022-11-20 20:17:27,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 20:17:27,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 20:17:27,981 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:17:27,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:17:27,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1670500523, now seen corresponding path program 13 times [2022-11-20 20:17:27,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:17:27,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787828452] [2022-11-20 20:17:27,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:17:27,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:17:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:17:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:17:28,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:17:28,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787828452] [2022-11-20 20:17:28,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787828452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:17:28,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327402802] [2022-11-20 20:17:28,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:17:28,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:17:28,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:17:28,868 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:17:28,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 20:17:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:17:28,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 20:17:28,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:17:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:17:29,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:17:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:17:29,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327402802] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:17:29,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [719470334] [2022-11-20 20:17:29,674 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:17:29,674 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:17:29,675 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:17:29,675 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:17:29,675 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:17:29,742 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:17:29,916 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3814#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:17:29,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:17:29,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:17:29,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 28 [2022-11-20 20:17:29,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569522278] [2022-11-20 20:17:29,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:17:29,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 20:17:29,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:17:29,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 20:17:29,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-11-20 20:17:29,918 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:17:30,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:17:30,394 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2022-11-20 20:17:30,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 20:17:30,395 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 20:17:30,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:17:30,396 INFO L225 Difference]: With dead ends: 55 [2022-11-20 20:17:30,396 INFO L226 Difference]: Without dead ends: 52 [2022-11-20 20:17:30,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 20:17:30,397 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:17:30,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 39 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:17:30,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-20 20:17:30,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2022-11-20 20:17:30,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 44 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:17:30,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2022-11-20 20:17:30,438 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 17 [2022-11-20 20:17:30,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:17:30,439 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2022-11-20 20:17:30,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:17:30,439 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2022-11-20 20:17:30,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 20:17:30,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:17:30,440 INFO L195 NwaCegarLoop]: trace histogram [9, 3, 1, 1, 1, 1, 1] [2022-11-20 20:17:30,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 20:17:30,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 20:17:30,646 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:17:30,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:17:30,646 INFO L85 PathProgramCache]: Analyzing trace with hash 2101208330, now seen corresponding path program 14 times [2022-11-20 20:17:30,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:17:30,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350866300] [2022-11-20 20:17:30,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:17:30,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:17:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:17:30,995 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:17:30,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:17:30,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350866300] [2022-11-20 20:17:30,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350866300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:17:30,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120081729] [2022-11-20 20:17:30,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:17:30,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:17:30,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:17:31,000 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:17:31,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 20:17:31,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 20:17:31,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:17:31,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 20:17:31,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:17:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:17:31,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:17:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:17:31,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120081729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:17:31,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [65556364] [2022-11-20 20:17:31,705 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:17:31,706 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:17:31,706 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:17:31,706 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:17:31,706 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:17:31,769 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:17:31,953 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4135#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:17:31,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:17:31,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:17:31,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2022-11-20 20:17:31,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391798880] [2022-11-20 20:17:31,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:17:31,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-20 20:17:31,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:17:31,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-20 20:17:31,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 20:17:31,956 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:18:40,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:18:40,388 INFO L93 Difference]: Finished difference Result 160 states and 206 transitions. [2022-11-20 20:18:40,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-11-20 20:18:40,388 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 20:18:40,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:18:40,390 INFO L225 Difference]: With dead ends: 160 [2022-11-20 20:18:40,390 INFO L226 Difference]: Without dead ends: 157 [2022-11-20 20:18:40,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4771 ImplicationChecksByTransitivity, 68.1s TimeCoverageRelationStatistics Valid=3572, Invalid=11434, Unknown=0, NotChecked=0, Total=15006 [2022-11-20 20:18:40,394 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 770 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:18:40,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [770 Valid, 139 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 20:18:40,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-20 20:18:40,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 48. [2022-11-20 20:18:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 47 states have internal predecessors, (69), 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) [2022-11-20 20:18:40,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 69 transitions. [2022-11-20 20:18:40,451 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 69 transitions. Word has length 17 [2022-11-20 20:18:40,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:18:40,451 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 69 transitions. [2022-11-20 20:18:40,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:18:40,452 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 69 transitions. [2022-11-20 20:18:40,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 20:18:40,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:18:40,453 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2022-11-20 20:18:40,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 20:18:40,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 20:18:40,654 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:18:40,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:18:40,654 INFO L85 PathProgramCache]: Analyzing trace with hash 245238815, now seen corresponding path program 15 times [2022-11-20 20:18:40,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:18:40,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139008030] [2022-11-20 20:18:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:18:40,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:18:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:18:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:18:41,004 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:18:41,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139008030] [2022-11-20 20:18:41,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139008030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:18:41,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565379771] [2022-11-20 20:18:41,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:18:41,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:18:41,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:18:41,012 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:18:41,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 20:18:41,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:18:41,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:18:41,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-20 20:18:41,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:18:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:18:41,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:18:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:18:41,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565379771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:18:41,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [397221385] [2022-11-20 20:18:41,641 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:18:41,641 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:18:41,643 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:18:41,643 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:18:41,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:18:41,713 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:18:41,891 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4811#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:18:41,892 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:18:41,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:18:41,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2022-11-20 20:18:41,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152842891] [2022-11-20 20:18:41,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:18:41,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 20:18:41,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:18:41,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 20:18:41,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=974, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 20:18:41,894 INFO L87 Difference]: Start difference. First operand 48 states and 69 transitions. Second operand has 30 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 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) [2022-11-20 20:18:42,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:18:42,367 INFO L93 Difference]: Finished difference Result 59 states and 80 transitions. [2022-11-20 20:18:42,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 20:18:42,370 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-20 20:18:42,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:18:42,371 INFO L225 Difference]: With dead ends: 59 [2022-11-20 20:18:42,371 INFO L226 Difference]: Without dead ends: 48 [2022-11-20 20:18:42,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=124, Invalid=1436, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 20:18:42,372 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:18:42,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 43 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:18:42,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-20 20:18:42,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-20 20:18:42,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.446808510638298) internal successors, (68), 47 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:18:42,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2022-11-20 20:18:42,436 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 18 [2022-11-20 20:18:42,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:18:42,437 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2022-11-20 20:18:42,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1) internal successors, (33), 29 states have internal predecessors, (33), 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) [2022-11-20 20:18:42,437 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2022-11-20 20:18:42,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 20:18:42,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:18:42,438 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1] [2022-11-20 20:18:42,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-20 20:18:42,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:18:42,644 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:18:42,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:18:42,645 INFO L85 PathProgramCache]: Analyzing trace with hash 722479082, now seen corresponding path program 16 times [2022-11-20 20:18:42,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:18:42,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363160044] [2022-11-20 20:18:42,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:18:42,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:18:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:18:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:18:43,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:18:43,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363160044] [2022-11-20 20:18:43,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363160044] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:18:43,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697779721] [2022-11-20 20:18:43,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:18:43,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:18:43,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:18:43,593 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:18:43,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 20:18:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:18:43,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 20:18:43,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:18:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:18:43,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:18:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:18:44,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697779721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:18:44,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [905174254] [2022-11-20 20:18:44,503 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:18:44,503 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:18:44,503 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:18:44,504 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:18:44,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:18:44,571 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:18:44,767 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5172#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:18:44,767 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:18:44,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:18:44,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 32 [2022-11-20 20:18:44,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692988381] [2022-11-20 20:18:44,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:18:44,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 20:18:44,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:18:44,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 20:18:44,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1147, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 20:18:44,769 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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) [2022-11-20 20:18:45,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:18:45,405 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2022-11-20 20:18:45,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 20:18:45,405 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 19 [2022-11-20 20:18:45,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:18:45,406 INFO L225 Difference]: With dead ends: 59 [2022-11-20 20:18:45,406 INFO L226 Difference]: Without dead ends: 56 [2022-11-20 20:18:45,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 20:18:45,408 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:18:45,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 37 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 20:18:45,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-20 20:18:45,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2022-11-20 20:18:45,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.446808510638298) internal successors, (68), 47 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:18:45,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 68 transitions. [2022-11-20 20:18:45,449 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 68 transitions. Word has length 19 [2022-11-20 20:18:45,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:18:45,449 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 68 transitions. [2022-11-20 20:18:45,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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) [2022-11-20 20:18:45,450 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2022-11-20 20:18:45,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 20:18:45,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:18:45,450 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1] [2022-11-20 20:18:45,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 20:18:45,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:18:45,655 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:18:45,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:18:45,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1189519211, now seen corresponding path program 17 times [2022-11-20 20:18:45,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:18:45,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353657083] [2022-11-20 20:18:45,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:18:45,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:18:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:18:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:18:46,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:18:46,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353657083] [2022-11-20 20:18:46,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353657083] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:18:46,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850722008] [2022-11-20 20:18:46,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:18:46,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:18:46,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:18:46,088 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:18:46,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 20:18:46,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 20:18:46,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:18:46,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 20:18:46,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:18:46,425 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:18:46,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:18:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:18:47,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850722008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:18:47,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1713540413] [2022-11-20 20:18:47,021 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:18:47,022 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:18:47,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:18:47,022 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:18:47,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:18:47,087 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:18:47,281 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5523#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:18:47,281 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:18:47,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:18:47,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-11-20 20:18:47,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217445924] [2022-11-20 20:18:47,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:18:47,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 20:18:47,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:18:47,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 20:18:47,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1171, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 20:18:47,283 INFO L87 Difference]: Start difference. First operand 48 states and 68 transitions. Second operand has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 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) [2022-11-20 20:19:03,247 WARN L233 SmtUtils]: Spent 6.59s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:19:26,068 WARN L233 SmtUtils]: Spent 5.96s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:20:52,873 WARN L233 SmtUtils]: Spent 5.78s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:21:27,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:21:27,271 INFO L93 Difference]: Finished difference Result 183 states and 230 transitions. [2022-11-20 20:21:27,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-11-20 20:21:27,272 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-20 20:21:27,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:21:27,273 INFO L225 Difference]: With dead ends: 183 [2022-11-20 20:21:27,273 INFO L226 Difference]: Without dead ends: 180 [2022-11-20 20:21:27,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7719 ImplicationChecksByTransitivity, 159.4s TimeCoverageRelationStatistics Valid=5495, Invalid=17457, Unknown=0, NotChecked=0, Total=22952 [2022-11-20 20:21:27,276 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1031 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:21:27,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1031 Valid, 135 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 20:21:27,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-20 20:21:27,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 53. [2022-11-20 20:21:27,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 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) [2022-11-20 20:21:27,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 79 transitions. [2022-11-20 20:21:27,332 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 79 transitions. Word has length 19 [2022-11-20 20:21:27,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:21:27,332 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 79 transitions. [2022-11-20 20:21:27,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 34 states have internal predecessors, (38), 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) [2022-11-20 20:21:27,333 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 79 transitions. [2022-11-20 20:21:27,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 20:21:27,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:21:27,333 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1] [2022-11-20 20:21:27,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 20:21:27,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:21:27,534 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:21:27,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:21:27,534 INFO L85 PathProgramCache]: Analyzing trace with hash 921345216, now seen corresponding path program 18 times [2022-11-20 20:21:27,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:21:27,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878721847] [2022-11-20 20:21:27,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:27,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:21:27,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:21:27,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:21:27,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878721847] [2022-11-20 20:21:27,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878721847] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:21:27,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872562177] [2022-11-20 20:21:27,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:21:27,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:21:27,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:21:27,917 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:21:27,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 20:21:27,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:21:27,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:21:27,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 20:21:27,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:28,060 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:21:28,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:21:28,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872562177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:21:28,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [76322164] [2022-11-20 20:21:28,617 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:21:28,618 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:21:28,618 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:21:28,618 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:21:28,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:21:28,687 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:21:28,840 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6318#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:21:28,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:21:28,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:21:28,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-11-20 20:21:28,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672830108] [2022-11-20 20:21:28,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:21:28,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 20:21:28,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:21:28,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 20:21:28,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1240, Unknown=0, NotChecked=0, Total=1332 [2022-11-20 20:21:28,842 INFO L87 Difference]: Start difference. First operand 53 states and 79 transitions. Second operand has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 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) [2022-11-20 20:21:29,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:21:29,363 INFO L93 Difference]: Finished difference Result 65 states and 91 transitions. [2022-11-20 20:21:29,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 20:21:29,363 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 20:21:29,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:21:29,364 INFO L225 Difference]: With dead ends: 65 [2022-11-20 20:21:29,364 INFO L226 Difference]: Without dead ends: 53 [2022-11-20 20:21:29,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=140, Invalid=1840, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 20:21:29,366 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 18 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:21:29,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 45 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:21:29,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-20 20:21:29,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-20 20:21:29,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.5) internal successors, (78), 52 states have internal predecessors, (78), 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) [2022-11-20 20:21:29,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 78 transitions. [2022-11-20 20:21:29,415 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 78 transitions. Word has length 20 [2022-11-20 20:21:29,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:21:29,416 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 78 transitions. [2022-11-20 20:21:29,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 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) [2022-11-20 20:21:29,416 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 78 transitions. [2022-11-20 20:21:29,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 20:21:29,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:21:29,417 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1] [2022-11-20 20:21:29,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 20:21:29,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:21:29,623 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:21:29,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:21:29,624 INFO L85 PathProgramCache]: Analyzing trace with hash -12258869, now seen corresponding path program 19 times [2022-11-20 20:21:29,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:21:29,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524981077] [2022-11-20 20:21:29,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:29,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:21:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:21:30,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:21:30,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524981077] [2022-11-20 20:21:30,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524981077] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:21:30,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948202552] [2022-11-20 20:21:30,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:21:30,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:21:30,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:21:30,700 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:21:30,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 20:21:30,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:30,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-20 20:21:30,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:21:31,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:21:31,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948202552] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:21:31,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1241972888] [2022-11-20 20:21:31,778 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:21:31,778 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:21:31,779 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:21:31,779 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:21:31,779 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:21:31,843 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:21:32,050 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6719#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:21:32,050 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:21:32,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:21:32,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 11] total 36 [2022-11-20 20:21:32,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331615865] [2022-11-20 20:21:32,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:21:32,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-20 20:21:32,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:21:32,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-20 20:21:32,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1433, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 20:21:32,053 INFO L87 Difference]: Start difference. First operand 53 states and 78 transitions. Second operand has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 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) [2022-11-20 20:21:32,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:21:32,795 INFO L93 Difference]: Finished difference Result 65 states and 90 transitions. [2022-11-20 20:21:32,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 20:21:32,795 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 20:21:32,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:21:32,796 INFO L225 Difference]: With dead ends: 65 [2022-11-20 20:21:32,796 INFO L226 Difference]: Without dead ends: 62 [2022-11-20 20:21:32,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 20:21:32,797 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 20:21:32,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 40 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 20:21:32,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-20 20:21:32,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2022-11-20 20:21:32,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.5) internal successors, (78), 52 states have internal predecessors, (78), 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) [2022-11-20 20:21:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 78 transitions. [2022-11-20 20:21:32,849 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 78 transitions. Word has length 21 [2022-11-20 20:21:32,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:21:32,850 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 78 transitions. [2022-11-20 20:21:32,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 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) [2022-11-20 20:21:32,850 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 78 transitions. [2022-11-20 20:21:32,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-20 20:21:32,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:21:32,850 INFO L195 NwaCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1] [2022-11-20 20:21:32,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 20:21:33,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:21:33,055 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:21:33,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:21:33,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1581083242, now seen corresponding path program 20 times [2022-11-20 20:21:33,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:21:33,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467092927] [2022-11-20 20:21:33,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:21:33,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:21:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:21:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:21:33,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:21:33,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467092927] [2022-11-20 20:21:33,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467092927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:21:33,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430748072] [2022-11-20 20:21:33,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:21:33,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:21:33,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:21:33,485 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:21:33,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 20:21:33,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-20 20:21:33,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:21:33,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 20:21:33,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:21:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:21:33,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:21:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:21:34,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430748072] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:21:34,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [818127078] [2022-11-20 20:21:34,518 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:21:34,518 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:21:34,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:21:34,518 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:21:34,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:21:34,575 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:21:34,758 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7108#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:21:34,758 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:21:34,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:21:34,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2022-11-20 20:21:34,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531484761] [2022-11-20 20:21:34,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:21:34,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-20 20:21:34,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:21:34,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-20 20:21:34,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1442, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 20:21:34,760 INFO L87 Difference]: Start difference. First operand 53 states and 78 transitions. Second operand has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:22:09,070 WARN L233 SmtUtils]: Spent 18.38s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:22:29,932 WARN L233 SmtUtils]: Spent 9.90s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:22:50,793 WARN L233 SmtUtils]: Spent 13.22s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:23:06,995 WARN L233 SmtUtils]: Spent 8.98s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:23:17,320 WARN L233 SmtUtils]: Spent 6.91s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:23:29,508 WARN L233 SmtUtils]: Spent 7.61s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:23:43,897 WARN L233 SmtUtils]: Spent 5.06s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:23:55,961 WARN L233 SmtUtils]: Spent 6.62s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:24:05,560 WARN L233 SmtUtils]: Spent 5.69s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:24:28,387 WARN L233 SmtUtils]: Spent 7.52s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:26:10,336 WARN L233 SmtUtils]: Spent 13.19s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:26:37,847 WARN L233 SmtUtils]: Spent 8.25s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:26:57,131 WARN L233 SmtUtils]: Spent 7.21s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:27:24,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:27:24,652 INFO L93 Difference]: Finished difference Result 208 states and 261 transitions. [2022-11-20 20:27:24,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-11-20 20:27:24,652 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-20 20:27:24,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:27:24,654 INFO L225 Difference]: With dead ends: 208 [2022-11-20 20:27:24,654 INFO L226 Difference]: Without dead ends: 205 [2022-11-20 20:27:24,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11032 ImplicationChecksByTransitivity, 348.8s TimeCoverageRelationStatistics Valid=7507, Invalid=24352, Unknown=3, NotChecked=0, Total=31862 [2022-11-20 20:27:24,657 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1335 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1335 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:27:24,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1335 Valid, 171 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-20 20:27:24,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-20 20:27:24,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 56. [2022-11-20 20:27:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.6) internal successors, (88), 55 states have internal predecessors, (88), 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) [2022-11-20 20:27:24,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 88 transitions. [2022-11-20 20:27:24,704 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 88 transitions. Word has length 21 [2022-11-20 20:27:24,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:27:24,704 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 88 transitions. [2022-11-20 20:27:24,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 20:27:24,704 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 88 transitions. [2022-11-20 20:27:24,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 20:27:24,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:27:24,705 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2022-11-20 20:27:24,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 20:27:24,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 20:27:24,905 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:27:24,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:27:24,906 INFO L85 PathProgramCache]: Analyzing trace with hash -380694785, now seen corresponding path program 21 times [2022-11-20 20:27:24,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:27:24,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960134142] [2022-11-20 20:27:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:27:24,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:27:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:27:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:27:25,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:27:25,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960134142] [2022-11-20 20:27:25,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960134142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:27:25,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247357414] [2022-11-20 20:27:25,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 20:27:25,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:27:25,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:27:25,291 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:27:25,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 20:27:25,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 20:27:25,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:27:25,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-20 20:27:25,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:27:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:27:25,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:27:26,146 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:27:26,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247357414] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:27:26,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1597433718] [2022-11-20 20:27:26,147 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:27:26,147 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:27:26,147 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:27:26,147 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:27:26,148 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:27:26,200 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:27:26,379 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8020#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:27:26,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:27:26,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:27:26,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 39 [2022-11-20 20:27:26,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816583995] [2022-11-20 20:27:26,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:27:26,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 20:27:26,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:27:26,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 20:27:26,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1538, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 20:27:26,384 INFO L87 Difference]: Start difference. First operand 56 states and 88 transitions. Second operand has 40 states, 40 states have (on average 1.1) internal successors, (44), 39 states have internal predecessors, (44), 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) [2022-11-20 20:27:42,703 WARN L233 SmtUtils]: Spent 8.96s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:28:09,308 WARN L233 SmtUtils]: Spent 6.74s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:28:11,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:28:22,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-20 20:28:25,484 WARN L837 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967287) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967289) 4294967296)) (< 0 (mod (+ 4294967292 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967293) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~z~0#1| 4294967293) 4294967296)) (< 0 (mod (+ 4294967288 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ 4294967294 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967294) 4294967296)) (< 0 (mod (+ 4294967291 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967288) 4294967296)) (< 0 (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967289) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967292) 4294967296)) (< 0 (mod (+ 4294967290 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967291) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967290) 4294967296))) is different from false [2022-11-20 20:30:12,992 WARN L233 SmtUtils]: Spent 12.98s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:30:38,312 WARN L233 SmtUtils]: Spent 5.29s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:30:51,264 WARN L233 SmtUtils]: Spent 7.03s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 20:31:07,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:31:07,220 INFO L93 Difference]: Finished difference Result 186 states and 242 transitions. [2022-11-20 20:31:07,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-11-20 20:31:07,221 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 20:31:07,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:31:07,222 INFO L225 Difference]: With dead ends: 186 [2022-11-20 20:31:07,222 INFO L226 Difference]: Without dead ends: 173 [2022-11-20 20:31:07,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6723 ImplicationChecksByTransitivity, 209.4s TimeCoverageRelationStatistics Valid=3117, Invalid=21066, Unknown=1, NotChecked=308, Total=24492 [2022-11-20 20:31:07,229 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 615 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:31:07,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 114 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 521 Invalid, 0 Unknown, 1 Unchecked, 12.0s Time] [2022-11-20 20:31:07,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-20 20:31:07,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 74. [2022-11-20 20:31:07,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.4383561643835616) internal successors, (105), 73 states have internal predecessors, (105), 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) [2022-11-20 20:31:07,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 105 transitions. [2022-11-20 20:31:07,375 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 105 transitions. Word has length 22 [2022-11-20 20:31:07,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:31:07,375 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 105 transitions. [2022-11-20 20:31:07,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 39 states have internal predecessors, (44), 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) [2022-11-20 20:31:07,375 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 105 transitions. [2022-11-20 20:31:07,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 20:31:07,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:31:07,375 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1] [2022-11-20 20:31:07,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 20:31:07,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 20:31:07,579 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:31:07,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:31:07,580 INFO L85 PathProgramCache]: Analyzing trace with hash 73944394, now seen corresponding path program 22 times [2022-11-20 20:31:07,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:31:07,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606060167] [2022-11-20 20:31:07,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:31:07,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:31:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:31:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:31:08,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:31:08,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606060167] [2022-11-20 20:31:08,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606060167] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:31:08,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573201663] [2022-11-20 20:31:08,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 20:31:08,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:31:08,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:31:08,856 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:31:08,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 20:31:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:31:08,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-20 20:31:08,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:31:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:31:09,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:31:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:31:10,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573201663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:31:10,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1313430138] [2022-11-20 20:31:10,096 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:31:10,097 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:31:10,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:31:10,097 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:31:10,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:31:10,155 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:31:10,372 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8909#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:31:10,373 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:31:10,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:31:10,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 12] total 40 [2022-11-20 20:31:10,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585749717] [2022-11-20 20:31:10,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:31:10,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 20:31:10,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:31:10,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 20:31:10,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1751, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 20:31:10,374 INFO L87 Difference]: Start difference. First operand 74 states and 105 transitions. Second operand has 41 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 40 states have internal predecessors, (64), 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) [2022-11-20 20:31:11,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:31:11,340 INFO L93 Difference]: Finished difference Result 87 states and 118 transitions. [2022-11-20 20:31:11,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 20:31:11,340 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 40 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 20:31:11,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:31:11,341 INFO L225 Difference]: With dead ends: 87 [2022-11-20 20:31:11,341 INFO L226 Difference]: Without dead ends: 84 [2022-11-20 20:31:11,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=147, Invalid=1833, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 20:31:11,342 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 20:31:11,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 41 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 20:31:11,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-20 20:31:11,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2022-11-20 20:31:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.4383561643835616) internal successors, (105), 73 states have internal predecessors, (105), 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) [2022-11-20 20:31:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 105 transitions. [2022-11-20 20:31:11,470 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 105 transitions. Word has length 23 [2022-11-20 20:31:11,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:31:11,471 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 105 transitions. [2022-11-20 20:31:11,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 40 states have internal predecessors, (64), 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) [2022-11-20 20:31:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 105 transitions. [2022-11-20 20:31:11,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 20:31:11,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:31:11,472 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1] [2022-11-20 20:31:11,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-20 20:31:11,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:31:11,673 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:31:11,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:31:11,673 INFO L85 PathProgramCache]: Analyzing trace with hash -2003360928, now seen corresponding path program 23 times [2022-11-20 20:31:11,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:31:11,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643038824] [2022-11-20 20:31:11,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:31:11,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:31:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:31:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:31:12,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:31:12,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643038824] [2022-11-20 20:31:12,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643038824] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:31:12,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947787660] [2022-11-20 20:31:12,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:31:12,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:31:12,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:31:12,172 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:31:12,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2925579-e77f-4b0a-a562-ca45108a5400/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 20:31:12,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 20:31:12,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:31:12,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-20 20:31:12,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:31:12,574 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:31:12,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 20:31:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:31:13,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947787660] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 20:31:13,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [280937164] [2022-11-20 20:31:13,560 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-20 20:31:13,561 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 20:31:13,561 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 20:31:13,562 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 20:31:13,562 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 20:31:13,638 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 20:31:13,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9407#(and (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= (mod |ULTIMATE.start_main_~n~0#1| 4294967296) (mod |ULTIMATE.start_main_~x~0#1| 4294967296)) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (not (< 0 (mod |ULTIMATE.start_main_~z~0#1| 4294967296))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 20:31:13,901 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 20:31:13,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 20:31:13,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 43 [2022-11-20 20:31:13,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535729984] [2022-11-20 20:31:13,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 20:31:13,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-20 20:31:13,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:31:13,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-20 20:31:13,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1846, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 20:31:13,903 INFO L87 Difference]: Start difference. First operand 74 states and 105 transitions. Second operand has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 43 states have internal predecessors, (48), 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)