./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/deep-nested.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-simple/deep-nested.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur --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 abddf9ff39262b7e56b56d5272c2d316261bfefbe98fc5849d87d962ab5f7694 --- 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-38b53e6 [2022-11-25 23:23:09,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:23:09,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:23:09,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:23:09,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:23:09,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:23:09,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:23:09,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:23:09,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:23:09,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:23:09,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:23:09,825 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:23:09,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:23:09,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:23:09,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:23:09,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:23:09,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:23:09,830 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:23:09,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:23:09,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:23:09,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:23:09,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:23:09,848 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:23:09,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:23:09,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:23:09,860 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:23:09,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:23:09,862 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:23:09,862 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:23:09,863 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:23:09,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:23:09,864 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:23:09,866 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:23:09,867 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:23:09,868 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:23:09,869 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:23:09,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:23:09,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:23:09,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:23:09,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:23:09,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:23:09,873 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-25 23:23:09,913 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:23:09,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:23:09,914 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:23:09,914 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:23:09,915 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:23:09,915 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:23:09,915 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:23:09,915 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:23:09,916 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:23:09,916 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:23:09,917 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:23:09,917 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:23:09,917 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:23:09,917 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:23:09,918 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:23:09,918 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:23:09,918 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:23:09,918 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:23:09,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:23:09,920 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:23:09,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:23:09,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:23:09,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:23:09,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:23:09,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:23:09,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:23:09,921 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:23:09,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:23:09,922 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:23:09,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:23:09,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:23:09,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:23:09,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:23:09,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:23:09,923 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:23:09,924 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:23:09,924 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:23:09,924 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:23:09,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:23:09,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:23:09,925 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:23:09,925 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_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> abddf9ff39262b7e56b56d5272c2d316261bfefbe98fc5849d87d962ab5f7694 [2022-11-25 23:23:10,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:23:10,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:23:10,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:23:10,315 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:23:10,315 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:23:10,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/loop-simple/deep-nested.c [2022-11-25 23:23:13,257 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:23:13,432 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:23:13,432 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/sv-benchmarks/c/loop-simple/deep-nested.c [2022-11-25 23:23:13,445 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/data/915283281/25481ec721df4049a1d09e8f52bb999b/FLAGfac0d23b2 [2022-11-25 23:23:13,828 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/data/915283281/25481ec721df4049a1d09e8f52bb999b [2022-11-25 23:23:13,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:23:13,838 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:23:13,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:23:13,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:23:13,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:23:13,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:23:13" (1/1) ... [2022-11-25 23:23:13,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7768caf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:13, skipping insertion in model container [2022-11-25 23:23:13,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:23:13" (1/1) ... [2022-11-25 23:23:13,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:23:13,873 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:23:14,055 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_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/sv-benchmarks/c/loop-simple/deep-nested.c[625,638] [2022-11-25 23:23:14,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:23:14,071 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:23:14,086 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_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/sv-benchmarks/c/loop-simple/deep-nested.c[625,638] [2022-11-25 23:23:14,087 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:23:14,099 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:23:14,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:14 WrapperNode [2022-11-25 23:23:14,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:23:14,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:23:14,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:23:14,101 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:23:14,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:14" (1/1) ... [2022-11-25 23:23:14,115 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:14" (1/1) ... [2022-11-25 23:23:14,131 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 61 [2022-11-25 23:23:14,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:23:14,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:23:14,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:23:14,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:23:14,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:14" (1/1) ... [2022-11-25 23:23:14,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:14" (1/1) ... [2022-11-25 23:23:14,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:14" (1/1) ... [2022-11-25 23:23:14,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:14" (1/1) ... [2022-11-25 23:23:14,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:14" (1/1) ... [2022-11-25 23:23:14,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:14" (1/1) ... [2022-11-25 23:23:14,151 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:14" (1/1) ... [2022-11-25 23:23:14,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:14" (1/1) ... [2022-11-25 23:23:14,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:23:14,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:23:14,154 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:23:14,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:23:14,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:14" (1/1) ... [2022-11-25 23:23:14,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:23:14,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:23:14,183 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:23:14,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:23:14,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:23:14,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:23:14,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:23:14,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:23:14,309 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:23:14,311 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:23:14,493 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:23:14,557 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:23:14,557 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-25 23:23:14,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:23:14 BoogieIcfgContainer [2022-11-25 23:23:14,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:23:14,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:23:14,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:23:14,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:23:14,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:23:13" (1/3) ... [2022-11-25 23:23:14,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b867c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:23:14, skipping insertion in model container [2022-11-25 23:23:14,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:23:14" (2/3) ... [2022-11-25 23:23:14,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b867c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:23:14, skipping insertion in model container [2022-11-25 23:23:14,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:23:14" (3/3) ... [2022-11-25 23:23:14,590 INFO L112 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2022-11-25 23:23:14,608 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:23:14,627 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 23:23:14,692 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:23:14,699 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;@53e5275f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:23:14,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 23:23:14,704 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 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) [2022-11-25 23:23:14,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:23:14,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:23:14,711 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:23:14,712 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:23:14,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:23:14,718 INFO L85 PathProgramCache]: Analyzing trace with hash 879794961, now seen corresponding path program 1 times [2022-11-25 23:23:14,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:23:14,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354803949] [2022-11-25 23:23:14,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:14,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:23:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:23:15,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:23:15,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354803949] [2022-11-25 23:23:15,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354803949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:23:15,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:23:15,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:23:15,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038090314] [2022-11-25 23:23:15,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:23:15,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:23:15,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:23:15,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:23:15,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:23:15,238 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 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) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 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) [2022-11-25 23:23:15,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:23:15,326 INFO L93 Difference]: Finished difference Result 24 states and 36 transitions. [2022-11-25 23:23:15,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:23:15,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 [2022-11-25 23:23:15,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:23:15,336 INFO L225 Difference]: With dead ends: 24 [2022-11-25 23:23:15,337 INFO L226 Difference]: Without dead ends: 13 [2022-11-25 23:23:15,339 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 [2022-11-25 23:23:15,343 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 15 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:23:15,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 2 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:23:15,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-25 23:23:15,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2022-11-25 23:23:15,389 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) [2022-11-25 23:23:15,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2022-11-25 23:23:15,391 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2022-11-25 23:23:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:23:15,392 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2022-11-25 23:23:15,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-25 23:23:15,393 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2022-11-25 23:23:15,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 23:23:15,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:23:15,394 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:23:15,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:23:15,396 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:23:15,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:23:15,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2085127801, now seen corresponding path program 1 times [2022-11-25 23:23:15,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:23:15,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136422362] [2022-11-25 23:23:15,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:15,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:23:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:23:15,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:23:15,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136422362] [2022-11-25 23:23:15,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136422362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:23:15,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:23:15,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:23:15,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759993705] [2022-11-25 23:23:15,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:23:15,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:23:15,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:23:15,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:23:15,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:23:15,922 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) [2022-11-25 23:23:15,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:23:15,994 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2022-11-25 23:23:15,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:23:15,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 23:23:15,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:23:15,996 INFO L225 Difference]: With dead ends: 23 [2022-11-25 23:23:15,996 INFO L226 Difference]: Without dead ends: 21 [2022-11-25 23:23:15,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:23:16,000 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:23:16,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:23:16,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-25 23:23:16,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-11-25 23:23:16,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 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) [2022-11-25 23:23:16,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2022-11-25 23:23:16,009 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2022-11-25 23:23:16,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:23:16,010 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2022-11-25 23:23:16,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) [2022-11-25 23:23:16,010 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2022-11-25 23:23:16,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 23:23:16,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:23:16,015 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:23:16,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:23:16,023 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:23:16,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:23:16,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1421280196, now seen corresponding path program 1 times [2022-11-25 23:23:16,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:23:16,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099634030] [2022-11-25 23:23:16,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:16,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:23:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:23:16,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:23:16,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099634030] [2022-11-25 23:23:16,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099634030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:23:16,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726792981] [2022-11-25 23:23:16,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:16,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:16,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:23:16,397 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:23:16,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:23:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:16,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:23:16,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:23:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:23:16,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:23:16,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726792981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:23:16,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:23:16,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-11-25 23:23:16,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79656586] [2022-11-25 23:23:16,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:23:16,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:23:16,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:23:16,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:23:16,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:23:16,527 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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) [2022-11-25 23:23:16,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:23:16,632 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2022-11-25 23:23:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:23:16,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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 13 [2022-11-25 23:23:16,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:23:16,634 INFO L225 Difference]: With dead ends: 48 [2022-11-25 23:23:16,634 INFO L226 Difference]: Without dead ends: 37 [2022-11-25 23:23:16,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:23:16,639 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 37 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:23:16,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 6 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:23:16,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-25 23:23:16,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2022-11-25 23:23:16,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 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) [2022-11-25 23:23:16,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2022-11-25 23:23:16,665 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2022-11-25 23:23:16,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:23:16,665 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2022-11-25 23:23:16,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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) [2022-11-25 23:23:16,666 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2022-11-25 23:23:16,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 23:23:16,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:23:16,667 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:23:16,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:23:16,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:16,873 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:23:16,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:23:16,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1913796903, now seen corresponding path program 1 times [2022-11-25 23:23:16,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:23:16,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796854375] [2022-11-25 23:23:16,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:16,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:23:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:23:17,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:23:17,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796854375] [2022-11-25 23:23:17,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796854375] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:23:17,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267686263] [2022-11-25 23:23:17,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:17,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:17,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:23:17,096 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:23:17,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:23:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:17,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:23:17,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:23:17,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:23:17,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:23:17,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267686263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:23:17,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:23:17,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-25 23:23:17,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132236340] [2022-11-25 23:23:17,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:23:17,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:23:17,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:23:17,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:23:17,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:23:17,221 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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) [2022-11-25 23:23:17,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:23:17,340 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2022-11-25 23:23:17,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:23:17,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 [2022-11-25 23:23:17,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:23:17,342 INFO L225 Difference]: With dead ends: 56 [2022-11-25 23:23:17,342 INFO L226 Difference]: Without dead ends: 37 [2022-11-25 23:23:17,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:23:17,343 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 68 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:23:17,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 6 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:23:17,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-25 23:23:17,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2022-11-25 23:23:17,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 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) [2022-11-25 23:23:17,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-11-25 23:23:17,353 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 15 [2022-11-25 23:23:17,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:23:17,353 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-11-25 23:23:17,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-11-25 23:23:17,354 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-11-25 23:23:17,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 23:23:17,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:23:17,354 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:23:17,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:23:17,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:17,555 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:23:17,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:23:17,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1798734434, now seen corresponding path program 1 times [2022-11-25 23:23:17,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:23:17,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126744891] [2022-11-25 23:23:17,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:17,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:23:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 23:23:17,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:23:17,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126744891] [2022-11-25 23:23:17,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126744891] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:23:17,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444980480] [2022-11-25 23:23:17,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:17,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:17,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:23:17,734 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:23:17,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:23:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:17,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:23:17,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:23:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:23:17,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:23:17,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444980480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:23:17,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:23:17,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-25 23:23:17,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666362538] [2022-11-25 23:23:17,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:23:17,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:23:17,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:23:17,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:23:17,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:23:17,878 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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) [2022-11-25 23:23:18,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:23:18,004 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2022-11-25 23:23:18,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:23:18,005 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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 17 [2022-11-25 23:23:18,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:23:18,007 INFO L225 Difference]: With dead ends: 58 [2022-11-25 23:23:18,007 INFO L226 Difference]: Without dead ends: 37 [2022-11-25 23:23:18,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:23:18,008 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 46 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:23:18,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 6 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:23:18,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-25 23:23:18,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2022-11-25 23:23:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 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) [2022-11-25 23:23:18,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2022-11-25 23:23:18,025 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 17 [2022-11-25 23:23:18,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:23:18,026 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2022-11-25 23:23:18,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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) [2022-11-25 23:23:18,026 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2022-11-25 23:23:18,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-25 23:23:18,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:23:18,028 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:23:18,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:23:18,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:18,233 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:23:18,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:23:18,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1475056415, now seen corresponding path program 1 times [2022-11-25 23:23:18,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:23:18,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719775276] [2022-11-25 23:23:18,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:18,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:23:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:23:18,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:23:18,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719775276] [2022-11-25 23:23:18,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719775276] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:23:18,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568904357] [2022-11-25 23:23:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:18,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:18,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:23:18,509 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:23:18,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:23:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:18,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:23:18,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:23:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:23:18,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:23:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:23:18,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568904357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:23:18,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [162691310] [2022-11-25 23:23:18,862 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-25 23:23:18,862 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:23:18,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:23:18,871 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:23:18,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:23:21,024 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:23:21,771 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '826#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (<= |#NULL.base| 0) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-25 23:23:21,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:23:21,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:23:21,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2022-11-25 23:23:21,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959416267] [2022-11-25 23:23:21,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:23:21,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 23:23:21,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:23:21,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 23:23:21,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-25 23:23:21,775 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:23:23,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:23:23,630 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2022-11-25 23:23:23,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 23:23:23,631 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-25 23:23:23,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:23:23,632 INFO L225 Difference]: With dead ends: 134 [2022-11-25 23:23:23,632 INFO L226 Difference]: Without dead ends: 90 [2022-11-25 23:23:23,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=472, Invalid=1978, Unknown=0, NotChecked=0, Total=2450 [2022-11-25 23:23:23,634 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 295 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:23:23,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 5 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:23:23,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-25 23:23:23,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 57. [2022-11-25 23:23:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 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) [2022-11-25 23:23:23,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 72 transitions. [2022-11-25 23:23:23,656 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 72 transitions. Word has length 22 [2022-11-25 23:23:23,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:23:23,657 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 72 transitions. [2022-11-25 23:23:23,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:23:23,657 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 72 transitions. [2022-11-25 23:23:23,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-25 23:23:23,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:23:23,658 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-11-25 23:23:23,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:23:23,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:23,864 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:23:23,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:23:23,864 INFO L85 PathProgramCache]: Analyzing trace with hash 868760348, now seen corresponding path program 2 times [2022-11-25 23:23:23,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:23:23,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080549102] [2022-11-25 23:23:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:23,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:23:23,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:24,278 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-25 23:23:24,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:23:24,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080549102] [2022-11-25 23:23:24,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080549102] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:23:24,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832853292] [2022-11-25 23:23:24,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:23:24,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:24,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:23:24,285 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:23:24,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:23:24,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 23:23:24,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:23:24,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:23:24,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:23:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-25 23:23:24,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:23:24,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832853292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:23:24,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:23:24,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-11-25 23:23:24,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237465392] [2022-11-25 23:23:24,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:23:24,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:23:24,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:23:24,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:23:24,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:23:24,485 INFO L87 Difference]: Start difference. First operand 57 states and 72 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 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) [2022-11-25 23:23:24,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:23:24,554 INFO L93 Difference]: Finished difference Result 97 states and 121 transitions. [2022-11-25 23:23:24,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:23:24,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 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 40 [2022-11-25 23:23:24,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:23:24,556 INFO L225 Difference]: With dead ends: 97 [2022-11-25 23:23:24,556 INFO L226 Difference]: Without dead ends: 95 [2022-11-25 23:23:24,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:23:24,558 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:23:24,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 4 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:23:24,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-25 23:23:24,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2022-11-25 23:23:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 74 states have internal predecessors, (94), 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) [2022-11-25 23:23:24,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2022-11-25 23:23:24,601 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 40 [2022-11-25 23:23:24,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:23:24,602 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2022-11-25 23:23:24,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 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) [2022-11-25 23:23:24,602 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2022-11-25 23:23:24,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-25 23:23:24,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:23:24,603 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-25 23:23:24,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:23:24,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:24,809 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:23:24,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:23:24,810 INFO L85 PathProgramCache]: Analyzing trace with hash -208931846, now seen corresponding path program 3 times [2022-11-25 23:23:24,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:23:24,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074860390] [2022-11-25 23:23:24,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:24,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:23:24,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:25,300 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 15 proven. 64 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-25 23:23:25,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:23:25,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074860390] [2022-11-25 23:23:25,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074860390] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:23:25,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625132052] [2022-11-25 23:23:25,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:23:25,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:25,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:23:25,305 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:23:25,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:23:25,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:23:25,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:23:25,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:23:25,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:23:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 98 proven. 20 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 23:23:25,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:23:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 91 proven. 27 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 23:23:25,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625132052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:23:25,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1881266333] [2022-11-25 23:23:25,716 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-25 23:23:25,716 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:23:25,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:23:25,717 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:23:25,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:23:26,924 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:23:27,847 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1921#(and (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~e~0#1|) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:23:27,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:23:27,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:23:27,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2022-11-25 23:23:27,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045513216] [2022-11-25 23:23:27,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:23:27,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 23:23:27,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:23:27,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 23:23:27,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-11-25 23:23:27,850 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 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) [2022-11-25 23:23:28,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:23:28,496 INFO L93 Difference]: Finished difference Result 223 states and 301 transitions. [2022-11-25 23:23:28,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:23:28,496 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-25 23:23:28,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:23:28,497 INFO L225 Difference]: With dead ends: 223 [2022-11-25 23:23:28,497 INFO L226 Difference]: Without dead ends: 122 [2022-11-25 23:23:28,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 120 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 23:23:28,499 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 59 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:23:28,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 10 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:23:28,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-25 23:23:28,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 111. [2022-11-25 23:23:28,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1818181818181819) internal successors, (130), 110 states have internal predecessors, (130), 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) [2022-11-25 23:23:28,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2022-11-25 23:23:28,531 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 50 [2022-11-25 23:23:28,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:23:28,531 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2022-11-25 23:23:28,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 21 states have internal predecessors, (73), 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) [2022-11-25 23:23:28,532 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2022-11-25 23:23:28,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 23:23:28,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:23:28,533 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-25 23:23:28,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:23:28,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:28,743 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:23:28,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:23:28,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1423124666, now seen corresponding path program 4 times [2022-11-25 23:23:28,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:23:28,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299841639] [2022-11-25 23:23:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:28,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:23:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 15 proven. 209 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-11-25 23:23:29,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:23:29,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299841639] [2022-11-25 23:23:29,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299841639] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:23:29,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101087475] [2022-11-25 23:23:29,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:23:29,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:29,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:23:29,332 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:23:29,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:23:29,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:29,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:23:29,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:23:29,662 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 262 proven. 87 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-25 23:23:29,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:23:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 260 proven. 89 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-25 23:23:29,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101087475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:23:29,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2004289181] [2022-11-25 23:23:29,942 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-25 23:23:29,942 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:23:29,942 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:23:29,942 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:23:29,943 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:23:31,172 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:23:32,240 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2931#(and (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~e~0#1|) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:23:32,240 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:23:32,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:23:32,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-11-25 23:23:32,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363011967] [2022-11-25 23:23:32,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:23:32,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 23:23:32,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:23:32,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 23:23:32,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:23:32,246 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 24 states have internal predecessors, (97), 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) [2022-11-25 23:23:39,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:23:39,432 INFO L93 Difference]: Finished difference Result 644 states and 814 transitions. [2022-11-25 23:23:39,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-25 23:23:39,435 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 24 states have internal predecessors, (97), 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 74 [2022-11-25 23:23:39,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:23:39,439 INFO L225 Difference]: With dead ends: 644 [2022-11-25 23:23:39,440 INFO L226 Difference]: Without dead ends: 537 [2022-11-25 23:23:39,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 194 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2470 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1149, Invalid=6507, Unknown=0, NotChecked=0, Total=7656 [2022-11-25 23:23:39,449 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 437 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:23:39,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 13 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 23:23:39,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-11-25 23:23:39,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 335. [2022-11-25 23:23:39,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.122754491017964) internal successors, (375), 334 states have internal predecessors, (375), 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) [2022-11-25 23:23:39,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 375 transitions. [2022-11-25 23:23:39,555 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 375 transitions. Word has length 74 [2022-11-25 23:23:39,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:23:39,555 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 375 transitions. [2022-11-25 23:23:39,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.041666666666667) internal successors, (97), 24 states have internal predecessors, (97), 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) [2022-11-25 23:23:39,556 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 375 transitions. [2022-11-25 23:23:39,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-11-25 23:23:39,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:23:39,563 INFO L195 NwaCegarLoop]: trace histogram [85, 84, 84, 13, 13, 12, 12, 12, 11, 2, 1, 1, 1, 1] [2022-11-25 23:23:39,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:23:39,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 23:23:39,774 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:23:39,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:23:39,774 INFO L85 PathProgramCache]: Analyzing trace with hash 32824799, now seen corresponding path program 5 times [2022-11-25 23:23:39,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:23:39,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341711537] [2022-11-25 23:23:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:39,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:23:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12367 backedges. 60 proven. 1944 refuted. 0 times theorem prover too weak. 10363 trivial. 0 not checked. [2022-11-25 23:23:42,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:23:42,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341711537] [2022-11-25 23:23:42,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341711537] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:23:42,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126011143] [2022-11-25 23:23:42,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:23:42,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:42,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:23:42,168 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:23:42,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:23:42,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 23:23:42,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:23:42,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:23:42,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:23:42,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12367 backedges. 1668 proven. 0 refuted. 0 times theorem prover too weak. 10699 trivial. 0 not checked. [2022-11-25 23:23:42,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:23:42,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126011143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:23:42,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:23:42,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 14 [2022-11-25 23:23:42,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919541507] [2022-11-25 23:23:42,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:23:42,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:23:42,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:23:42,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:23:42,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:23:42,841 INFO L87 Difference]: Start difference. First operand 335 states and 375 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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) [2022-11-25 23:23:43,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:23:43,034 INFO L93 Difference]: Finished difference Result 603 states and 656 transitions. [2022-11-25 23:23:43,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:23:43,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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 332 [2022-11-25 23:23:43,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:23:43,042 INFO L225 Difference]: With dead ends: 603 [2022-11-25 23:23:43,042 INFO L226 Difference]: Without dead ends: 601 [2022-11-25 23:23:43,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:23:43,044 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:23:43,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:23:43,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-11-25 23:23:43,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 354. [2022-11-25 23:23:43,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 1.1189801699716715) internal successors, (395), 353 states have internal predecessors, (395), 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) [2022-11-25 23:23:43,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 395 transitions. [2022-11-25 23:23:43,184 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 395 transitions. Word has length 332 [2022-11-25 23:23:43,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:23:43,185 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 395 transitions. [2022-11-25 23:23:43,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 3 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) [2022-11-25 23:23:43,185 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 395 transitions. [2022-11-25 23:23:43,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2022-11-25 23:23:43,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:23:43,191 INFO L195 NwaCegarLoop]: trace histogram [91, 90, 90, 14, 13, 13, 12, 12, 11, 2, 1, 1, 1, 1] [2022-11-25 23:23:43,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:23:43,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 23:23:43,396 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:23:43,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:23:43,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2045133972, now seen corresponding path program 6 times [2022-11-25 23:23:43,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:23:43,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119641677] [2022-11-25 23:23:43,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:43,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:23:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 14136 backedges. 61 proven. 2090 refuted. 0 times theorem prover too weak. 11985 trivial. 0 not checked. [2022-11-25 23:23:45,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:23:45,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119641677] [2022-11-25 23:23:45,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119641677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:23:45,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049916190] [2022-11-25 23:23:45,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:23:45,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:45,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:23:45,801 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:23:45,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:23:46,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:23:46,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:23:46,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 23:23:46,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:23:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 14136 backedges. 9336 proven. 344 refuted. 0 times theorem prover too weak. 4456 trivial. 0 not checked. [2022-11-25 23:23:46,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:23:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 14136 backedges. 9177 proven. 503 refuted. 0 times theorem prover too weak. 4456 trivial. 0 not checked. [2022-11-25 23:23:47,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049916190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:23:47,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [469698635] [2022-11-25 23:23:47,247 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-25 23:23:47,249 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:23:47,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:23:47,250 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:23:47,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:23:48,756 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:23:49,690 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9056#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (<= |#NULL.base| 0) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-25 23:23:49,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:23:49,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:23:49,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 42 [2022-11-25 23:23:49,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024288099] [2022-11-25 23:23:49,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:23:49,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-25 23:23:49,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:23:49,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-25 23:23:49,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=2004, Unknown=0, NotChecked=0, Total=2256 [2022-11-25 23:23:49,695 INFO L87 Difference]: Start difference. First operand 354 states and 395 transitions. Second operand has 42 states, 42 states have (on average 3.642857142857143) internal successors, (153), 42 states have internal predecessors, (153), 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) [2022-11-25 23:23:51,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:23:51,757 INFO L93 Difference]: Finished difference Result 836 states and 969 transitions. [2022-11-25 23:23:51,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:23:51,757 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.642857142857143) internal successors, (153), 42 states have internal predecessors, (153), 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 352 [2022-11-25 23:23:51,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:23:51,759 INFO L225 Difference]: With dead ends: 836 [2022-11-25 23:23:51,759 INFO L226 Difference]: Without dead ends: 448 [2022-11-25 23:23:51,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1081 GetRequests, 1023 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=381, Invalid=3159, Unknown=0, NotChecked=0, Total=3540 [2022-11-25 23:23:51,762 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 52 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:23:51,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 21 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:23:51,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-25 23:23:51,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 420. [2022-11-25 23:23:51,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.100238663484487) internal successors, (461), 419 states have internal predecessors, (461), 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) [2022-11-25 23:23:51,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 461 transitions. [2022-11-25 23:23:51,857 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 461 transitions. Word has length 352 [2022-11-25 23:23:51,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:23:51,857 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 461 transitions. [2022-11-25 23:23:51,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.642857142857143) internal successors, (153), 42 states have internal predecessors, (153), 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) [2022-11-25 23:23:51,858 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 461 transitions. [2022-11-25 23:23:51,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2022-11-25 23:23:51,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:23:51,865 INFO L195 NwaCegarLoop]: trace histogram [113, 112, 112, 14, 13, 13, 12, 12, 11, 2, 1, 1, 1, 1] [2022-11-25 23:23:51,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:23:52,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:52,072 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:23:52,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:23:52,072 INFO L85 PathProgramCache]: Analyzing trace with hash -723087710, now seen corresponding path program 7 times [2022-11-25 23:23:52,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:23:52,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949027127] [2022-11-25 23:23:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:23:52,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:23:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:54,769 INFO L134 CoverageAnalysis]: Checked inductivity of 21099 backedges. 61 proven. 2921 refuted. 0 times theorem prover too weak. 18117 trivial. 0 not checked. [2022-11-25 23:23:54,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:23:54,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949027127] [2022-11-25 23:23:54,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949027127] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:23:54,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259693770] [2022-11-25 23:23:54,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:23:54,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:23:54,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:23:54,784 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:23:54,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 23:23:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:23:55,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-25 23:23:55,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:23:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 21099 backedges. 10437 proven. 3365 refuted. 0 times theorem prover too weak. 7297 trivial. 0 not checked. [2022-11-25 23:23:56,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:23:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 21099 backedges. 10435 proven. 3367 refuted. 0 times theorem prover too weak. 7297 trivial. 0 not checked. [2022-11-25 23:23:57,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259693770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:23:57,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1051862403] [2022-11-25 23:23:57,067 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-25 23:23:57,067 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:23:57,067 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:23:57,067 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:23:57,068 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:23:58,416 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:23:59,495 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13480#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (<= |#NULL.base| 0) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-25 23:23:59,496 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:23:59,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:23:59,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 44 [2022-11-25 23:23:59,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256373544] [2022-11-25 23:23:59,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:23:59,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-25 23:23:59,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:23:59,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-25 23:23:59,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2239, Unknown=0, NotChecked=0, Total=2450 [2022-11-25 23:23:59,501 INFO L87 Difference]: Start difference. First operand 420 states and 461 transitions. Second operand has 44 states, 44 states have (on average 4.681818181818182) internal successors, (206), 44 states have internal predecessors, (206), 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) [2022-11-25 23:26:21,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:26:21,451 INFO L93 Difference]: Finished difference Result 2487 states and 2927 transitions. [2022-11-25 23:26:21,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2022-11-25 23:26:21,452 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.681818181818182) internal successors, (206), 44 states have internal predecessors, (206), 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 418 [2022-11-25 23:26:21,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:26:21,458 INFO L225 Difference]: With dead ends: 2487 [2022-11-25 23:26:21,458 INFO L226 Difference]: Without dead ends: 2071 [2022-11-25 23:26:21,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1479 GetRequests, 1218 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26571 ImplicationChecksByTransitivity, 134.5s TimeCoverageRelationStatistics Valid=6881, Invalid=62025, Unknown=0, NotChecked=0, Total=68906 [2022-11-25 23:26:21,469 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1192 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 6936 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1192 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 7257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 6936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:26:21,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1192 Valid, 23 Invalid, 7257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 6936 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2022-11-25 23:26:21,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2022-11-25 23:26:21,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1290. [2022-11-25 23:26:21,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1289 states have (on average 1.0698215671062838) internal successors, (1379), 1289 states have internal predecessors, (1379), 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) [2022-11-25 23:26:21,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1379 transitions. [2022-11-25 23:26:21,712 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1379 transitions. Word has length 418 [2022-11-25 23:26:21,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:26:21,713 INFO L495 AbstractCegarLoop]: Abstraction has 1290 states and 1379 transitions. [2022-11-25 23:26:21,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.681818181818182) internal successors, (206), 44 states have internal predecessors, (206), 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) [2022-11-25 23:26:21,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1379 transitions. [2022-11-25 23:26:21,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1289 [2022-11-25 23:26:21,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:26:21,748 INFO L195 NwaCegarLoop]: trace histogram [371, 370, 370, 30, 29, 29, 28, 28, 27, 2, 1, 1, 1, 1] [2022-11-25 23:26:21,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 23:26:21,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 23:26:21,949 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:26:21,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:26:21,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1384058732, now seen corresponding path program 8 times [2022-11-25 23:26:21,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:26:21,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428605167] [2022-11-25 23:26:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:26:21,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:26:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:26:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 220300 backedges. 141 proven. 17494 refuted. 0 times theorem prover too weak. 202665 trivial. 0 not checked. [2022-11-25 23:26:30,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:26:30,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428605167] [2022-11-25 23:26:30,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428605167] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:26:30,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140757275] [2022-11-25 23:26:30,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:26:30,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:26:30,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:26:30,992 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:26:31,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 23:26:31,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 23:26:31,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:26:31,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:26:31,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:26:36,323 INFO L134 CoverageAnalysis]: Checked inductivity of 220300 backedges. 0 proven. 110139 refuted. 0 times theorem prover too weak. 110161 trivial. 0 not checked. [2022-11-25 23:26:36,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:26:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 220300 backedges. 0 proven. 110139 refuted. 0 times theorem prover too weak. 110161 trivial. 0 not checked. [2022-11-25 23:26:39,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140757275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:26:39,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2014106347] [2022-11-25 23:26:39,328 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-25 23:26:39,328 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:26:39,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:26:39,329 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:26:39,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:26:40,600 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:26:41,426 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27047#(and (<= 0 |ULTIMATE.start_main_~b~0#1|) (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (<= |#NULL.base| 0) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-11-25 23:26:41,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:26:41,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:26:41,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 3, 3] total 24 [2022-11-25 23:26:41,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63373621] [2022-11-25 23:26:41,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:26:41,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 23:26:41,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:26:41,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 23:26:41,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:26:41,430 INFO L87 Difference]: Start difference. First operand 1290 states and 1379 transitions. Second operand has 25 states, 25 states have (on average 4.44) internal successors, (111), 24 states have internal predecessors, (111), 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) [2022-11-25 23:26:50,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:26:50,952 INFO L93 Difference]: Finished difference Result 5992 states and 6845 transitions. [2022-11-25 23:26:50,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-25 23:26:50,953 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.44) internal successors, (111), 24 states have internal predecessors, (111), 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 1288 [2022-11-25 23:26:50,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:26:50,966 INFO L225 Difference]: With dead ends: 5992 [2022-11-25 23:26:50,966 INFO L226 Difference]: Without dead ends: 4439 [2022-11-25 23:26:50,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3977 GetRequests, 3854 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4903 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1465, Invalid=14035, Unknown=0, NotChecked=0, Total=15500 [2022-11-25 23:26:50,971 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 274 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1960 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:26:50,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 8 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1960 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-25 23:26:50,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4439 states. [2022-11-25 23:26:52,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4439 to 3978. [2022-11-25 23:26:52,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3977 states have (on average 1.0550666331405583) internal successors, (4196), 3977 states have internal predecessors, (4196), 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) [2022-11-25 23:26:52,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 4196 transitions. [2022-11-25 23:26:52,085 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 4196 transitions. Word has length 1288 [2022-11-25 23:26:52,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:26:52,085 INFO L495 AbstractCegarLoop]: Abstraction has 3978 states and 4196 transitions. [2022-11-25 23:26:52,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.44) internal successors, (111), 24 states have internal predecessors, (111), 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) [2022-11-25 23:26:52,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 4196 transitions. [2022-11-25 23:26:52,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3977 [2022-11-25 23:26:52,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:26:52,194 INFO L195 NwaCegarLoop]: trace histogram [1181, 1180, 1180, 72, 71, 71, 70, 70, 69, 5, 4, 1, 1, 1] [2022-11-25 23:26:52,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 23:26:52,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:26:52,395 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:26:52,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:26:52,395 INFO L85 PathProgramCache]: Analyzing trace with hash -194255029, now seen corresponding path program 9 times [2022-11-25 23:26:52,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:26:52,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409428028] [2022-11-25 23:26:52,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:26:52,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:27:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:27:34,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2197978 backedges. 357 proven. 63359 refuted. 0 times theorem prover too weak. 2134262 trivial. 0 not checked. [2022-11-25 23:27:34,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:27:34,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409428028] [2022-11-25 23:27:34,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409428028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:27:34,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457991890] [2022-11-25 23:27:34,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:27:34,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:27:34,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:27:34,046 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:27:34,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 23:27:35,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:27:35,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:27:35,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 6057 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-25 23:27:35,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:27:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2197978 backedges. 1156213 proven. 30862 refuted. 0 times theorem prover too weak. 1010903 trivial. 0 not checked. [2022-11-25 23:27:40,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:27:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2197978 backedges. 1126806 proven. 60269 refuted. 0 times theorem prover too weak. 1010903 trivial. 0 not checked. [2022-11-25 23:27:49,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457991890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:27:49,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [653020044] [2022-11-25 23:27:49,004 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-25 23:27:49,004 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:27:49,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-25 23:27:49,005 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-25 23:27:49,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-25 23:27:50,033 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-25 23:28:09,079 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '65301#(and (= (mod |ULTIMATE.start_main_~c~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~a~0#1| 4294967296)) (= (mod (+ 4294967294 |ULTIMATE.start_main_~uint32_max~0#1|) 4294967296) (mod |ULTIMATE.start_main_~e~0#1| 4294967296)) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~c~0#1|) (= (mod |ULTIMATE.start_main_~e~0#1| 4294967296) (mod |ULTIMATE.start_main_~d~0#1| 4294967296)) (= (mod |ULTIMATE.start_main_~b~0#1| 4294967296) (mod |ULTIMATE.start_main_~c~0#1| 4294967296)) (<= 0 |ULTIMATE.start_main_~e~0#1|) (<= 0 |ULTIMATE.start_main_~a~0#1|) (<= 4294967295 |ULTIMATE.start_main_~uint32_max~0#1|) (<= |ULTIMATE.start_main_~uint32_max~0#1| 4294967295) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-25 23:28:09,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-25 23:28:09,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:28:09,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 37, 37] total 92 [2022-11-25 23:28:09,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660182345] [2022-11-25 23:28:09,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:28:09,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-11-25 23:28:09,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:28:09,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-11-25 23:28:09,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=927, Invalid=8775, Unknown=0, NotChecked=0, Total=9702 [2022-11-25 23:28:09,090 INFO L87 Difference]: Start difference. First operand 3978 states and 4196 transitions. Second operand has 92 states, 92 states have (on average 3.3152173913043477) internal successors, (305), 92 states have internal predecessors, (305), 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) [2022-11-25 23:28:32,288 WARN L233 SmtUtils]: Spent 5.66s on a formula simplification. DAG size of input: 101 DAG size of output: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:29:10,455 WARN L233 SmtUtils]: Spent 11.55s on a formula simplification. DAG size of input: 96 DAG size of output: 21 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:29:40,441 WARN L233 SmtUtils]: Spent 7.96s on a formula simplification. DAG size of input: 95 DAG size of output: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:30:40,741 WARN L233 SmtUtils]: Spent 9.19s on a formula simplification. DAG size of input: 87 DAG size of output: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:31:10,965 WARN L233 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 82 DAG size of output: 21 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:31:38,883 WARN L233 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 77 DAG size of output: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:35:42,734 WARN L233 SmtUtils]: Spent 1.09m on a formula simplification. DAG size of input: 76 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:35:45,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 23:35:47,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 23:35:48,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 23:35:53,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 23:35:55,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 23:35:57,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 23:36:00,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 23:36:02,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 23:36:04,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 23:36:08,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 23:36:10,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 23:36:13,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 23:36:15,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 23:36:18,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 23:36:20,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 23:36:22,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-25 23:37:59,211 WARN L233 SmtUtils]: Spent 57.05s on a formula simplification. DAG size of input: 76 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 23:37:59,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:37:59,694 INFO L93 Difference]: Finished difference Result 12188 states and 14055 transitions. [2022-11-25 23:37:59,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-25 23:37:59,695 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.3152173913043477) internal successors, (305), 92 states have internal predecessors, (305), 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 3976 [2022-11-25 23:37:59,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:37:59,719 INFO L225 Difference]: With dead ends: 12188 [2022-11-25 23:37:59,719 INFO L226 Difference]: Without dead ends: 8214 [2022-11-25 23:37:59,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11990 GetRequests, 11711 SyntacticMatches, 142 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13199 ImplicationChecksByTransitivity, 569.3s TimeCoverageRelationStatistics Valid=2280, Invalid=16862, Unknown=40, NotChecked=0, Total=19182 [2022-11-25 23:37:59,728 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 305 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 2237 mSolverCounterSat, 88 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 2335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 2237 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:37:59,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 24 Invalid, 2335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 2237 Invalid, 10 Unknown, 0 Unchecked, 42.6s Time] [2022-11-25 23:37:59,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8214 states. [2022-11-25 23:38:01,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8214 to 8213. [2022-11-25 23:38:01,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8213 states, 8212 states have (on average 1.026668290306868) internal successors, (8431), 8212 states have internal predecessors, (8431), 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) [2022-11-25 23:38:01,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8213 states to 8213 states and 8431 transitions. [2022-11-25 23:38:01,908 INFO L78 Accepts]: Start accepts. Automaton has 8213 states and 8431 transitions. Word has length 3976 [2022-11-25 23:38:01,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:38:01,909 INFO L495 AbstractCegarLoop]: Abstraction has 8213 states and 8431 transitions. [2022-11-25 23:38:01,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.3152173913043477) internal successors, (305), 92 states have internal predecessors, (305), 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) [2022-11-25 23:38:01,909 INFO L276 IsEmpty]: Start isEmpty. Operand 8213 states and 8431 transitions. [2022-11-25 23:38:02,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8210 [2022-11-25 23:38:02,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:38:02,351 INFO L195 NwaCegarLoop]: trace histogram [2592, 2591, 2591, 72, 71, 71, 70, 70, 69, 5, 4, 1, 1, 1] [2022-11-25 23:38:02,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 23:38:02,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cbe3209c-5bf8-4a76-bbc8-40cf92aed4c4/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 23:38:02,552 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 23:38:02,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:38:02,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1640657653, now seen corresponding path program 10 times [2022-11-25 23:38:02,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:38:02,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548887817] [2022-11-25 23:38:02,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:38:02,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms